diff --git a/ChangeLog b/ChangeLog
index 685fad5a8e..9e7c455c56 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,150 @@
 2015-10-20  Joseph Myers  <joseph@codesourcery.com>
 
+	* crypt/md5-crypt.c (__md5_crypt_r): Convert to prototype-style
+	function definition.
+	* crypt/sha256-crypt.c (__sha256_crypt_r): Likewise.
+	* crypt/sha512-crypt.c (__sha512_crypt_r): Likewise.
+	* debug/backtracesyms.c (__backtrace_symbols): Likewise.
+	* elf/dl-minimal.c (_itoa): Likewise.
+	* hurd/hurdmalloc.c (malloc): Likewise.
+	(free): Likewise.
+	(realloc): Likewise.
+	* inet/inet6_option.c (inet6_option_space): Likewise.
+	(inet6_option_init): Likewise.
+	(inet6_option_append): Likewise.
+	(inet6_option_alloc): Likewise.
+	(inet6_option_next): Likewise.
+	(inet6_option_find): Likewise.
+	* io/ftw.c (FTW_NAME): Likewise.
+	(NFTW_NAME): Likewise.
+	(NFTW_NEW_NAME): Likewise.
+	(NFTW_OLD_NAME): Likewise.
+	* libio/iofwide.c (_IO_fwide): Likewise.
+	* libio/strops.c (_IO_str_init_static_internal): Likewise.
+	(_IO_str_init_static): Likewise.
+	(_IO_str_init_readonly): Likewise.
+	(_IO_str_overflow): Likewise.
+	(_IO_str_underflow): Likewise.
+	(_IO_str_count): Likewise.
+	(_IO_str_seekoff): Likewise.
+	(_IO_str_pbackfail): Likewise.
+	(_IO_str_finish): Likewise.
+	* libio/wstrops.c (_IO_wstr_init_static): Likewise.
+	(_IO_wstr_overflow): Likewise.
+	(_IO_wstr_underflow): Likewise.
+	(_IO_wstr_count): Likewise.
+	(_IO_wstr_seekoff): Likewise.
+	(_IO_wstr_pbackfail): Likewise.
+	(_IO_wstr_finish): Likewise.
+	* locale/programs/localedef.c (normalize_codeset): Likewise.
+	* locale/programs/locarchive.c (add_locale_to_archive): Likewise.
+	(add_locales_to_archive): Likewise.
+	(delete_locales_from_archive): Likewise.
+	* malloc/malloc.c (__libc_mallinfo): Likewise.
+	* math/gen-auto-libm-tests.c (init_fp_formats): Likewise.
+	* misc/tsearch.c (__tfind): Likewise.
+	* nptl/pthread_attr_destroy.c (__pthread_attr_destroy): Likewise.
+	* nptl/pthread_attr_getdetachstate.c
+	(__pthread_attr_getdetachstate): Likewise.
+	* nptl/pthread_attr_getguardsize.c (pthread_attr_getguardsize):
+	Likewise.
+	* nptl/pthread_attr_getinheritsched.c
+	(__pthread_attr_getinheritsched): Likewise.
+	* nptl/pthread_attr_getschedparam.c
+	(__pthread_attr_getschedparam): Likewise.
+	* nptl/pthread_attr_getschedpolicy.c
+	(__pthread_attr_getschedpolicy): Likewise.
+	* nptl/pthread_attr_getscope.c (__pthread_attr_getscope):
+	Likewise.
+	* nptl/pthread_attr_getstack.c (__pthread_attr_getstack):
+	Likewise.
+	* nptl/pthread_attr_getstackaddr.c (__pthread_attr_getstackaddr):
+	Likewise.
+	* nptl/pthread_attr_getstacksize.c (__pthread_attr_getstacksize):
+	Likewise.
+	* nptl/pthread_attr_init.c (__pthread_attr_init_2_1): Likewise.
+	(__pthread_attr_init_2_0): Likewise.
+	* nptl/pthread_attr_setdetachstate.c
+	(__pthread_attr_setdetachstate): Likewise.
+	* nptl/pthread_attr_setguardsize.c (pthread_attr_setguardsize):
+	Likewise.
+	* nptl/pthread_attr_setinheritsched.c
+	(__pthread_attr_setinheritsched): Likewise.
+	* nptl/pthread_attr_setschedparam.c
+	(__pthread_attr_setschedparam): Likewise.
+	* nptl/pthread_attr_setschedpolicy.c
+	(__pthread_attr_setschedpolicy): Likewise.
+	* nptl/pthread_attr_setscope.c (__pthread_attr_setscope):
+	Likewise.
+	* nptl/pthread_attr_setstack.c (__pthread_attr_setstack):
+	Likewise.
+	* nptl/pthread_attr_setstackaddr.c (__pthread_attr_setstackaddr):
+	Likewise.
+	* nptl/pthread_attr_setstacksize.c (__pthread_attr_setstacksize):
+	Likewise.
+	* nptl/pthread_condattr_setclock.c (pthread_condattr_setclock):
+	Likewise.
+	* nptl/pthread_create.c (__find_in_stack_list): Likewise.
+	* nptl/pthread_getattr_np.c (pthread_getattr_np): Likewise.
+	* nptl/pthread_mutex_cond_lock.c (__pthread_mutex_lock): Define to
+	use internal_function.
+	* nptl/pthread_mutex_init.c (__pthread_mutex_init): Convert to
+	prototype-style function definition.
+	* nptl/pthread_mutex_lock.c (__pthread_mutex_lock): Likewise.
+	(__pthread_mutex_cond_lock_adjust): Likewise.  Use
+	internal_function.
+	* nptl/pthread_mutex_timedlock.c (pthread_mutex_timedlock):
+	Convert to prototype-style function definition.
+	* nptl/pthread_mutex_trylock.c (__pthread_mutex_trylock):
+	Likewise.
+	* nptl/pthread_mutex_unlock.c (__pthread_mutex_unlock_usercnt):
+	Likewise.
+	(__pthread_mutex_unlock): Likewise.
+	* nptl_db/td_ta_clear_event.c (td_ta_clear_event): Likewise.
+	* nptl_db/td_ta_set_event.c (td_ta_set_event): Likewise.
+	* nptl_db/td_thr_clear_event.c (td_thr_clear_event): Likewise.
+	* nptl_db/td_thr_event_enable.c (td_thr_event_enable): Likewise.
+	* nptl_db/td_thr_set_event.c (td_thr_set_event): Likewise.
+	* nss/makedb.c (process_input): Likewise.
+	* posix/fnmatch.c (__strchrnul): Likewise.
+	(__wcschrnul): Likewise.
+	(fnmatch): Likewise.
+	* posix/fnmatch_loop.c (FCT): Likewise.
+	* posix/glob.c (globfree): Likewise.
+	(__glob_pattern_type): Likewise.
+	(__glob_pattern_p): Likewise.
+	* posix/regcomp.c (re_compile_pattern): Likewise.
+	(re_set_syntax): Likewise.
+	(re_compile_fastmap): Likewise.
+	(regcomp): Likewise.
+	(regerror): Likewise.
+	(regfree): Likewise.
+	* posix/regexec.c (regexec): Likewise.
+	(re_match): Likewise.
+	(re_search): Likewise.
+	(re_match_2): Likewise.
+	(re_search_2): Likewise.
+	(re_search_stub): Likewise.  Use internal_function
+	(re_copy_regs): Likewise.
+	(re_set_registers): Convert to prototype-style function
+	definition.
+	(prune_impossible_nodes): Likewise.  Use internal_function.
+	* resolv/inet_net_pton.c (inet_net_pton): Convert to
+	prototype-style function definition.
+	(inet_net_pton_ipv4): Likewise.
+	* stdlib/strtod_l.c (____STRTOF_INTERNAL): Likewise.
+	* sysdeps/pthread/aio_cancel.c (aio_cancel): Likewise.
+	* sysdeps/pthread/aio_suspend.c (aio_suspend): Likewise.
+	* sysdeps/pthread/timer_delete.c (timer_delete): Likewise.
+	* sysdeps/unix/sysv/linux/dl-openat64.c (openat64): Likewise.
+	Make variadic.
+	* time/strptime_l.c (localtime_r): Convert to prototype-style
+	function definition.
+	* wcsmbs/mbsnrtowcs.c (__mbsnrtowcs): Likewise.
+	* wcsmbs/mbsrtowcs_l.c (__mbsrtowcs_l): Likewise.
+	* wcsmbs/wcsnrtombs.c (__wcsnrtombs): Likewise.
+	* wcsmbs/wcsrtombs.c (__wcsrtombs): Likewise.
+
 	* crypt/crypt.c (_ufc_doit_r): Convert to prototype-style function
 	definition.
 	(_ufc_doit_r): Likewise.
diff --git a/crypt/md5-crypt.c b/crypt/md5-crypt.c
index 1b890bc49a..dad5942dba 100644
--- a/crypt/md5-crypt.c
+++ b/crypt/md5-crypt.c
@@ -89,11 +89,7 @@ extern char *__md5_crypt (const char *key, const char *salt);
 /* This entry point is equivalent to the `crypt' function in Unix
    libcs.  */
 char *
-__md5_crypt_r (key, salt, buffer, buflen)
-     const char *key;
-     const char *salt;
-     char *buffer;
-     int buflen;
+__md5_crypt_r (const char *key, const char *salt, char *buffer, int buflen)
 {
   unsigned char alt_result[16]
     __attribute__ ((__aligned__ (__alignof__ (md5_uint32))));
diff --git a/crypt/sha256-crypt.c b/crypt/sha256-crypt.c
index d90e291aa7..96102e96c0 100644
--- a/crypt/sha256-crypt.c
+++ b/crypt/sha256-crypt.c
@@ -99,11 +99,7 @@ extern char *__sha256_crypt (const char *key, const char *salt);
 
 
 char *
-__sha256_crypt_r (key, salt, buffer, buflen)
-     const char *key;
-     const char *salt;
-     char *buffer;
-     int buflen;
+__sha256_crypt_r (const char *key, const char *salt, char *buffer, int buflen)
 {
   unsigned char alt_result[32]
     __attribute__ ((__aligned__ (__alignof__ (uint32_t))));
diff --git a/crypt/sha512-crypt.c b/crypt/sha512-crypt.c
index 9c581abb00..925749277a 100644
--- a/crypt/sha512-crypt.c
+++ b/crypt/sha512-crypt.c
@@ -99,11 +99,7 @@ extern char *__sha512_crypt (const char *key, const char *salt);
 
 
 char *
-__sha512_crypt_r (key, salt, buffer, buflen)
-     const char *key;
-     const char *salt;
-     char *buffer;
-     int buflen;
+__sha512_crypt_r (const char *key, const char *salt, char *buffer, int buflen)
 {
   unsigned char alt_result[64]
     __attribute__ ((__aligned__ (__alignof__ (uint64_t))));
diff --git a/debug/backtracesyms.c b/debug/backtracesyms.c
index 2c7305c81b..c25681b416 100644
--- a/debug/backtracesyms.c
+++ b/debug/backtracesyms.c
@@ -34,9 +34,7 @@
 
 
 char **
-__backtrace_symbols (array, size)
-     void *const *array;
-     int size;
+__backtrace_symbols (void *const *array, int size)
 {
   Dl_info info[size];
   int status[size];
diff --git a/elf/dl-minimal.c b/elf/dl-minimal.c
index ec7fe88d30..9129e5b5f6 100644
--- a/elf/dl-minimal.c
+++ b/elf/dl-minimal.c
@@ -324,11 +324,8 @@ __strtoul_internal (const char *nptr, char **endptr, int base, int group)
    also has to be present and it is never about speed when these
    functions are used.  */
 char *
-_itoa (value, buflim, base, upper_case)
-     unsigned long long int value;
-     char *buflim;
-     unsigned int base;
-     int upper_case;
+_itoa (unsigned long long int value, char *buflim, unsigned int base,
+       int upper_case)
 {
   assert (! upper_case);
 
diff --git a/hurd/hurdmalloc.c b/hurd/hurdmalloc.c
index 071abeb718..58c29fa07d 100644
--- a/hurd/hurdmalloc.c
+++ b/hurd/hurdmalloc.c
@@ -202,8 +202,7 @@ more_memory(int size, free_list_t fl)
 
 /* Declaration changed to standard one for GNU.  */
 void *
-malloc(size)
-	size_t size;
+malloc (size_t size)
 {
 	int i, n;
 	free_list_t fl;
@@ -269,8 +268,7 @@ malloc(size)
 
 /* Declaration changed to standard one for GNU.  */
 void
-free(base)
-	void *base;
+free (void *base)
 {
 	header_t h;
 	free_list_t fl;
@@ -318,9 +316,7 @@ free(base)
 
 /* Declaration changed to standard one for GNU.  */
 void *
-realloc(old_base, new_size)
-        void *old_base;
-        size_t new_size;
+realloc (void *old_base, size_t new_size)
 {
 	header_t h;
 	free_list_t fl;
diff --git a/inet/inet6_option.c b/inet/inet6_option.c
index 47ca82ffdc..070be3f9a6 100644
--- a/inet/inet6_option.c
+++ b/inet/inet6_option.c
@@ -88,8 +88,7 @@ static uint8_t *option_alloc (struct cmsghdr *cmsg, int datalen, int multx,
    beginning (the value y in the alignment term "xn + y"), the type
    byte, the length byte, and the option data.  */
 int
-inet6_option_space (nbytes)
-     int nbytes;
+inet6_option_space (int nbytes)
 {
   /* Add room for the extension header.  */
   nbytes += sizeof (struct ip6_ext);
@@ -106,10 +105,7 @@ link_warning (inet6_option_space,
    contain either Hop-by-Hop or Destination options.  It returns 0 on
    success or -1 on an error.  */
 int
-inet6_option_init (bp, cmsgp, type)
-     void *bp;
-     struct cmsghdr **cmsgp;
-     int type;
+inet6_option_init (void *bp, struct cmsghdr **cmsgp, int type)
 {
   /* Only Hop-by-Hop or Destination options allowed.  */
   if (type != IPV6_HOPOPTS && type != IPV6_DSTOPTS)
@@ -143,11 +139,8 @@ link_warning (inet6_option_init,
    inet6_option_init().  This function returns 0 if it succeeds or -1 on
    an error.  */
 int
-inet6_option_append (cmsg, typep, multx, plusy)
-     struct cmsghdr *cmsg;
-     const uint8_t *typep;
-     int multx;
-     int plusy;
+inet6_option_append (struct cmsghdr *cmsg, const uint8_t *typep, int multx,
+		     int plusy)
 {
   /* typep is a pointer to the 8-bit option type.  It is assumed that this
      field is immediately followed by the 8-bit option data length field,
@@ -223,11 +216,7 @@ option_alloc (struct cmsghdr *cmsg, int datalen, int multx, int plusy)
 
 
 uint8_t *
-inet6_option_alloc (cmsg, datalen, multx, plusy)
-     struct cmsghdr *cmsg;
-     int datalen;
-     int multx;
-     int plusy;
+inet6_option_alloc (struct cmsghdr *cmsg, int datalen, int multx, int plusy)
 {
   return option_alloc (cmsg, datalen, multx, plusy);
 }
@@ -245,9 +234,7 @@ link_warning (inet6_option_alloc,
    to be processed, the return value is -1 and *tptrp is NULL.  If an
    error occurs, the return value is -1 and *tptrp is not NULL.  */
 int
-inet6_option_next (cmsg, tptrp)
-     const struct cmsghdr *cmsg;
-     uint8_t **tptrp;
+inet6_option_next (const struct cmsghdr *cmsg, uint8_t **tptrp)
 {
   /* Make sure it is an option of the right type.  */
   if (cmsg->cmsg_level != IPPROTO_IPV6
@@ -303,10 +290,7 @@ link_warning (inet6_option_next,
    pointer to cmsghdr structure of which cmsg_level equals IPPROTO_IPV6
    and cmsg_type equals either IPV6_HOPOPTS or IPV6_DSTOPTS.  */
 int
-inet6_option_find (cmsg, tptrp, type)
-     const struct cmsghdr *cmsg;
-     uint8_t **tptrp;
-     int type;
+inet6_option_find (const struct cmsghdr *cmsg, uint8_t **tptrp, int type)
 {
   /* Make sure it is an option of the right type.  */
   if (cmsg->cmsg_level != IPPROTO_IPV6
diff --git a/io/ftw.c b/io/ftw.c
index b95da60bb0..beffba4630 100644
--- a/io/ftw.c
+++ b/io/ftw.c
@@ -817,21 +817,14 @@ ftw_startup (const char *dir, int is_nftw, void *func, int descriptors,
 /* Entry points.  */
 
 int
-FTW_NAME (path, func, descriptors)
-     const char *path;
-     FTW_FUNC_T func;
-     int descriptors;
+FTW_NAME (const char *path, FTW_FUNC_T func, int descriptors)
 {
   return ftw_startup (path, 0, func, descriptors, 0);
 }
 
 #ifndef _LIBC
 int
-NFTW_NAME (path, func, descriptors, flags)
-     const char *path;
-     NFTW_FUNC_T func;
-     int descriptors;
-     int flags;
+NFTW_NAME (const char *path, NFTW_FUNC_T func, int descriptors, int flags)
 {
   return ftw_startup (path, 1, func, descriptors, flags);
 }
@@ -842,11 +835,7 @@ NFTW_NAME (path, func, descriptors, flags)
 int NFTW_NEW_NAME (const char *, NFTW_FUNC_T, int, int);
 
 int
-NFTW_NEW_NAME (path, func, descriptors, flags)
-     const char *path;
-     NFTW_FUNC_T func;
-     int descriptors;
-     int flags;
+NFTW_NEW_NAME (const char *path, NFTW_FUNC_T func, int descriptors, int flags)
 {
   if (flags
       & ~(FTW_PHYS | FTW_MOUNT | FTW_CHDIR | FTW_DEPTH | FTW_ACTIONRETVAL))
@@ -867,11 +856,7 @@ int NFTW_OLD_NAME (const char *, NFTW_FUNC_T, int, int);
 
 int
 attribute_compat_text_section
-NFTW_OLD_NAME (path, func, descriptors, flags)
-     const char *path;
-     NFTW_FUNC_T func;
-     int descriptors;
-     int flags;
+NFTW_OLD_NAME (const char *path, NFTW_FUNC_T func, int descriptors, int flags)
 {
   flags &= (FTW_PHYS | FTW_MOUNT | FTW_CHDIR | FTW_DEPTH);
   return ftw_startup (path, 1, func, descriptors, flags);
diff --git a/libio/iofwide.c b/libio/iofwide.c
index 0c175d19d1..f48ebe1e2f 100644
--- a/libio/iofwide.c
+++ b/libio/iofwide.c
@@ -85,9 +85,7 @@ const struct _IO_codecvt __libio_codecvt =
    the orientation first.  */
 #undef _IO_fwide
 int
-_IO_fwide (fp, mode)
-     _IO_FILE *fp;
-     int mode;
+_IO_fwide (_IO_FILE *fp, int mode)
 {
   /* Normalize the value.  */
   mode = mode < 0 ? -1 : (mode == 0 ? 0 : 1);
diff --git a/libio/strops.c b/libio/strops.c
index 730dfc4ae1..aa5e700222 100644
--- a/libio/strops.c
+++ b/libio/strops.c
@@ -31,11 +31,8 @@
 #include <stdio_ext.h>
 
 void
-_IO_str_init_static_internal (sf, ptr, size, pstart)
-     _IO_strfile *sf;
-     char *ptr;
-     _IO_size_t size;
-     char *pstart;
+_IO_str_init_static_internal (_IO_strfile *sf, char *ptr, _IO_size_t size,
+			      char *pstart)
 {
   _IO_FILE *fp = &sf->_sbf._f;
   char *end;
@@ -68,29 +65,20 @@ _IO_str_init_static_internal (sf, ptr, size, pstart)
 }
 
 void
-_IO_str_init_static (sf, ptr, size, pstart)
-     _IO_strfile *sf;
-     char *ptr;
-     int size;
-     char *pstart;
+_IO_str_init_static (_IO_strfile *sf, char *ptr, int size, char *pstart)
 {
   return _IO_str_init_static_internal (sf, ptr, size < 0 ? -1 : size, pstart);
 }
 
 void
-_IO_str_init_readonly (sf, ptr, size)
-     _IO_strfile *sf;
-     const char *ptr;
-     int size;
+_IO_str_init_readonly (_IO_strfile *sf, const char *ptr, int size)
 {
   _IO_str_init_static_internal (sf, (char *) ptr, size < 0 ? -1 : size, NULL);
   sf->_sbf._f._IO_file_flags |= _IO_NO_WRITES;
 }
 
 int
-_IO_str_overflow (fp, c)
-     _IO_FILE *fp;
-     int c;
+_IO_str_overflow (_IO_FILE *fp, int c)
 {
   int flush_only = c == EOF;
   _IO_size_t pos;
@@ -151,8 +139,7 @@ _IO_str_overflow (fp, c)
 libc_hidden_def (_IO_str_overflow)
 
 int
-_IO_str_underflow (fp)
-     _IO_FILE *fp;
+_IO_str_underflow (_IO_FILE *fp)
 {
   if (fp->_IO_write_ptr > fp->_IO_read_end)
     fp->_IO_read_end = fp->_IO_write_ptr;
@@ -172,8 +159,7 @@ libc_hidden_def (_IO_str_underflow)
 /* The size of the valid part of the buffer.  */
 
 _IO_ssize_t
-_IO_str_count (fp)
-     _IO_FILE *fp;
+_IO_str_count (_IO_FILE *fp)
 {
   return ((fp->_IO_write_ptr > fp->_IO_read_end
 	   ? fp->_IO_write_ptr : fp->_IO_read_end)
@@ -246,11 +232,7 @@ enlarge_userbuf (_IO_FILE *fp, _IO_off64_t offset, int reading)
 
 
 _IO_off64_t
-_IO_str_seekoff (fp, offset, dir, mode)
-     _IO_FILE *fp;
-     _IO_off64_t offset;
-     int dir;
-     int mode;
+_IO_str_seekoff (_IO_FILE *fp, _IO_off64_t offset, int dir, int mode)
 {
   _IO_off64_t new_pos;
 
@@ -323,9 +305,7 @@ _IO_str_seekoff (fp, offset, dir, mode)
 libc_hidden_def (_IO_str_seekoff)
 
 int
-_IO_str_pbackfail (fp, c)
-     _IO_FILE *fp;
-     int c;
+_IO_str_pbackfail (_IO_FILE *fp, int c)
 {
   if ((fp->_flags & _IO_NO_WRITES) && c != EOF)
     return EOF;
@@ -334,9 +314,7 @@ _IO_str_pbackfail (fp, c)
 libc_hidden_def (_IO_str_pbackfail)
 
 void
-_IO_str_finish (fp, dummy)
-     _IO_FILE *fp;
-     int dummy;
+_IO_str_finish (_IO_FILE *fp, int dummy)
 {
   if (fp->_IO_buf_base && !(fp->_flags & _IO_USER_BUF))
     (((_IO_strfile *) fp)->_s._free_buffer) (fp->_IO_buf_base);
diff --git a/libio/wstrops.c b/libio/wstrops.c
index 3993579bd1..eeb9fb20d8 100644
--- a/libio/wstrops.c
+++ b/libio/wstrops.c
@@ -32,11 +32,8 @@
 #include <stdio_ext.h>
 
 void
-_IO_wstr_init_static (fp, ptr, size, pstart)
-     _IO_FILE *fp;
-     wchar_t *ptr;
-     _IO_size_t size;
-     wchar_t *pstart;
+_IO_wstr_init_static (_IO_FILE *fp, wchar_t *ptr, _IO_size_t size,
+		      wchar_t *pstart)
 {
   wchar_t *end;
 
@@ -70,9 +67,7 @@ _IO_wstr_init_static (fp, ptr, size, pstart)
 }
 
 _IO_wint_t
-_IO_wstr_overflow (fp, c)
-     _IO_FILE *fp;
-     _IO_wint_t c;
+_IO_wstr_overflow (_IO_FILE *fp, _IO_wint_t c)
 {
   int flush_only = c == WEOF;
   _IO_size_t pos;
@@ -142,8 +137,7 @@ _IO_wstr_overflow (fp, c)
 
 
 _IO_wint_t
-_IO_wstr_underflow (fp)
-     _IO_FILE *fp;
+_IO_wstr_underflow (_IO_FILE *fp)
 {
   if (fp->_wide_data->_IO_write_ptr > fp->_wide_data->_IO_read_end)
     fp->_wide_data->_IO_read_end = fp->_wide_data->_IO_write_ptr;
@@ -162,8 +156,7 @@ _IO_wstr_underflow (fp)
 
 /* The size of the valid part of the buffer.  */
 _IO_ssize_t
-_IO_wstr_count (fp)
-     _IO_FILE *fp;
+_IO_wstr_count (_IO_FILE *fp)
 {
   struct _IO_wide_data *wd = fp->_wide_data;
 
@@ -244,11 +237,7 @@ enlarge_userbuf (_IO_FILE *fp, _IO_off64_t offset, int reading)
 
 
 _IO_off64_t
-_IO_wstr_seekoff (fp, offset, dir, mode)
-     _IO_FILE *fp;
-     _IO_off64_t offset;
-     int dir;
-     int mode;
+_IO_wstr_seekoff (_IO_FILE *fp, _IO_off64_t offset, int dir, int mode)
 {
   _IO_off64_t new_pos;
 
@@ -326,9 +315,7 @@ _IO_wstr_seekoff (fp, offset, dir, mode)
 }
 
 _IO_wint_t
-_IO_wstr_pbackfail (fp, c)
-     _IO_FILE *fp;
-     _IO_wint_t c;
+_IO_wstr_pbackfail (_IO_FILE *fp, _IO_wint_t c)
 {
   if ((fp->_flags & _IO_NO_WRITES) && c != WEOF)
     return WEOF;
@@ -336,9 +323,7 @@ _IO_wstr_pbackfail (fp, c)
 }
 
 void
-_IO_wstr_finish (fp, dummy)
-     _IO_FILE *fp;
-     int dummy;
+_IO_wstr_finish (_IO_FILE *fp, int dummy)
 {
   if (fp->_wide_data->_IO_buf_base && !(fp->_flags2 & _IO_FLAGS2_USER_WBUF))
     (((_IO_strfile *) fp)->_s._free_buffer) (fp->_wide_data->_IO_buf_base);
diff --git a/locale/programs/localedef.c b/locale/programs/localedef.c
index 06fca12094..c8da20b813 100644
--- a/locale/programs/localedef.c
+++ b/locale/programs/localedef.c
@@ -504,9 +504,7 @@ construct_output_path (char *path)
    names.  Normalization allows the user to use any of the common
    names.  */
 static const char *
-normalize_codeset (codeset, name_len)
-     const char *codeset;
-     size_t name_len;
+normalize_codeset (const char *codeset, size_t name_len)
 {
   int len = 0;
   int only_digit = 1;
diff --git a/locale/programs/locarchive.c b/locale/programs/locarchive.c
index 49f7f1b3cf..345f9b70e2 100644
--- a/locale/programs/locarchive.c
+++ b/locale/programs/locarchive.c
@@ -1127,11 +1127,8 @@ add_locale (struct locarhandle *ah,
    of the files if necessary.  Add all the names, possibly overwriting
    old files.  */
 int
-add_locale_to_archive (ah, name, data, replace)
-     struct locarhandle *ah;
-     const char *name;
-     locale_data_t data;
-     bool replace;
+add_locale_to_archive (struct locarhandle *ah, const char *name,
+		       locale_data_t data, bool replace)
 {
   char *normalized_name = NULL;
   uint32_t locrec_offset;
@@ -1329,10 +1326,7 @@ add_locale_to_archive (ah, name, data, replace)
 
 
 int
-add_locales_to_archive (nlist, list, replace)
-     size_t nlist;
-     char *list[];
-     bool replace;
+add_locales_to_archive (size_t nlist, char *list[], bool replace)
 {
   struct locarhandle ah;
   int result = 0;
@@ -1529,9 +1523,7 @@ add_locales_to_archive (nlist, list, replace)
 
 
 int
-delete_locales_from_archive (nlist, list)
-     size_t nlist;
-     char *list[];
+delete_locales_from_archive (size_t nlist, char *list[])
 {
   struct locarhandle ah;
   struct locarhead *head;
diff --git a/malloc/malloc.c b/malloc/malloc.c
index 0eca9ce0e2..9371b5a224 100644
--- a/malloc/malloc.c
+++ b/malloc/malloc.c
@@ -4667,7 +4667,7 @@ int_mallinfo (mstate av, struct mallinfo *m)
 
 
 struct mallinfo
-__libc_mallinfo ()
+__libc_mallinfo (void)
 {
   struct mallinfo m;
   mstate ar_ptr;
diff --git a/math/gen-auto-libm-tests.c b/math/gen-auto-libm-tests.c
index 465f7c602c..03ec6c4987 100644
--- a/math/gen-auto-libm-tests.c
+++ b/math/gen-auto-libm-tests.c
@@ -675,7 +675,7 @@ generic_value_copy (generic_value *dest, const generic_value *src)
 /* Initialize data for floating-point formats.  */
 
 static void
-init_fp_formats ()
+init_fp_formats (void)
 {
   int global_max_exp = 0, global_min_subnorm_exp = 0;
   for (fp_format f = fp_first_format; f < fp_num_formats; f++)
diff --git a/misc/tsearch.c b/misc/tsearch.c
index 869dc9bec7..5b9276c9f2 100644
--- a/misc/tsearch.c
+++ b/misc/tsearch.c
@@ -301,10 +301,7 @@ weak_alias (__tsearch, tsearch)
    KEY is the key to be located, ROOTP is the address of tree root,
    COMPAR the ordering function.  */
 void *
-__tfind (key, vrootp, compar)
-     const void *key;
-     void *const *vrootp;
-     __compar_fn_t compar;
+__tfind (const void *key, void *const *vrootp, __compar_fn_t compar)
 {
   node *rootp = (node *) vrootp;
 
diff --git a/nptl/pthread_attr_destroy.c b/nptl/pthread_attr_destroy.c
index 72ee19eca9..f2701c8bb3 100644
--- a/nptl/pthread_attr_destroy.c
+++ b/nptl/pthread_attr_destroy.c
@@ -24,8 +24,7 @@
 #include <shlib-compat.h>
 
 int
-__pthread_attr_destroy (attr)
-     pthread_attr_t *attr;
+__pthread_attr_destroy (pthread_attr_t *attr)
 {
   struct pthread_attr *iattr;
 
diff --git a/nptl/pthread_attr_getdetachstate.c b/nptl/pthread_attr_getdetachstate.c
index 92d683dc5c..8cc78785de 100644
--- a/nptl/pthread_attr_getdetachstate.c
+++ b/nptl/pthread_attr_getdetachstate.c
@@ -21,9 +21,7 @@
 
 
 int
-__pthread_attr_getdetachstate (attr, detachstate)
-     const pthread_attr_t *attr;
-     int *detachstate;
+__pthread_attr_getdetachstate (const pthread_attr_t *attr, int *detachstate)
 {
   struct pthread_attr *iattr;
 
diff --git a/nptl/pthread_attr_getguardsize.c b/nptl/pthread_attr_getguardsize.c
index 83cb8016ea..b05b36ecfb 100644
--- a/nptl/pthread_attr_getguardsize.c
+++ b/nptl/pthread_attr_getguardsize.c
@@ -21,9 +21,7 @@
 
 
 int
-pthread_attr_getguardsize (attr, guardsize)
-     const pthread_attr_t *attr;
-     size_t *guardsize;
+pthread_attr_getguardsize (const pthread_attr_t *attr, size_t *guardsize)
 {
   struct pthread_attr *iattr;
 
diff --git a/nptl/pthread_attr_getinheritsched.c b/nptl/pthread_attr_getinheritsched.c
index 9a0e8e6b8f..ed3435e020 100644
--- a/nptl/pthread_attr_getinheritsched.c
+++ b/nptl/pthread_attr_getinheritsched.c
@@ -21,9 +21,7 @@
 
 
 int
-__pthread_attr_getinheritsched (attr, inherit)
-     const pthread_attr_t *attr;
-     int *inherit;
+__pthread_attr_getinheritsched (const pthread_attr_t *attr, int *inherit)
 {
   struct pthread_attr *iattr;
 
diff --git a/nptl/pthread_attr_getschedparam.c b/nptl/pthread_attr_getschedparam.c
index 3f38bd711d..3c9dffa6d3 100644
--- a/nptl/pthread_attr_getschedparam.c
+++ b/nptl/pthread_attr_getschedparam.c
@@ -22,9 +22,8 @@
 
 
 int
-__pthread_attr_getschedparam (attr, param)
-     const pthread_attr_t *attr;
-     struct sched_param *param;
+__pthread_attr_getschedparam (const pthread_attr_t *attr,
+			      struct sched_param *param)
 {
   struct pthread_attr *iattr;
 
diff --git a/nptl/pthread_attr_getschedpolicy.c b/nptl/pthread_attr_getschedpolicy.c
index 19996a68de..10728c364d 100644
--- a/nptl/pthread_attr_getschedpolicy.c
+++ b/nptl/pthread_attr_getschedpolicy.c
@@ -21,9 +21,7 @@
 
 
 int
-__pthread_attr_getschedpolicy (attr, policy)
-     const pthread_attr_t *attr;
-     int *policy;
+__pthread_attr_getschedpolicy (const pthread_attr_t *attr, int *policy)
 {
   struct pthread_attr *iattr;
 
diff --git a/nptl/pthread_attr_getscope.c b/nptl/pthread_attr_getscope.c
index e72247a99a..e704161caf 100644
--- a/nptl/pthread_attr_getscope.c
+++ b/nptl/pthread_attr_getscope.c
@@ -21,9 +21,7 @@
 
 
 int
-__pthread_attr_getscope (attr, scope)
-     const pthread_attr_t *attr;
-     int *scope;
+__pthread_attr_getscope (const pthread_attr_t *attr, int *scope)
 {
   struct pthread_attr *iattr;
 
diff --git a/nptl/pthread_attr_getstack.c b/nptl/pthread_attr_getstack.c
index 96c15c58ad..4cedcc5fd2 100644
--- a/nptl/pthread_attr_getstack.c
+++ b/nptl/pthread_attr_getstack.c
@@ -21,10 +21,8 @@
 
 
 int
-__pthread_attr_getstack (attr, stackaddr, stacksize)
-     const pthread_attr_t *attr;
-     void **stackaddr;
-     size_t *stacksize;
+__pthread_attr_getstack (const pthread_attr_t *attr, void **stackaddr,
+			 size_t *stacksize)
 {
   struct pthread_attr *iattr;
 
diff --git a/nptl/pthread_attr_getstackaddr.c b/nptl/pthread_attr_getstackaddr.c
index 9c85cec202..bceab68b58 100644
--- a/nptl/pthread_attr_getstackaddr.c
+++ b/nptl/pthread_attr_getstackaddr.c
@@ -22,9 +22,7 @@
 
 
 int
-__pthread_attr_getstackaddr (attr, stackaddr)
-     const pthread_attr_t *attr;
-     void **stackaddr;
+__pthread_attr_getstackaddr (const pthread_attr_t *attr, void **stackaddr)
 {
   struct pthread_attr *iattr;
 
diff --git a/nptl/pthread_attr_getstacksize.c b/nptl/pthread_attr_getstacksize.c
index ab18c27ae0..b48e1d06af 100644
--- a/nptl/pthread_attr_getstacksize.c
+++ b/nptl/pthread_attr_getstacksize.c
@@ -21,9 +21,7 @@
 
 
 int
-__pthread_attr_getstacksize (attr, stacksize)
-     const pthread_attr_t *attr;
-     size_t *stacksize;
+__pthread_attr_getstacksize (const pthread_attr_t *attr, size_t *stacksize)
 {
   struct pthread_attr *iattr;
 
diff --git a/nptl/pthread_attr_init.c b/nptl/pthread_attr_init.c
index 89bec2959b..3780b625c3 100644
--- a/nptl/pthread_attr_init.c
+++ b/nptl/pthread_attr_init.c
@@ -30,8 +30,7 @@ int __attr_list_lock = LLL_LOCK_INITIALIZER;
 
 
 int
-__pthread_attr_init_2_1 (attr)
-     pthread_attr_t *attr;
+__pthread_attr_init_2_1 (pthread_attr_t *attr)
 {
   struct pthread_attr *iattr;
 
@@ -54,8 +53,7 @@ versioned_symbol (libpthread, __pthread_attr_init_2_1, pthread_attr_init,
 
 #if SHLIB_COMPAT(libpthread, GLIBC_2_0, GLIBC_2_1)
 int
-__pthread_attr_init_2_0 (attr)
-     pthread_attr_t *attr;
+__pthread_attr_init_2_0 (pthread_attr_t *attr)
 {
   /* This code is specific to the old LinuxThread code which has a too
      small pthread_attr_t definition.  The struct looked like
diff --git a/nptl/pthread_attr_setdetachstate.c b/nptl/pthread_attr_setdetachstate.c
index ad0d43135a..c4e085b723 100644
--- a/nptl/pthread_attr_setdetachstate.c
+++ b/nptl/pthread_attr_setdetachstate.c
@@ -22,9 +22,7 @@
 
 
 int
-__pthread_attr_setdetachstate (attr, detachstate)
-     pthread_attr_t *attr;
-     int detachstate;
+__pthread_attr_setdetachstate (pthread_attr_t *attr, int detachstate)
 {
   struct pthread_attr *iattr;
 
diff --git a/nptl/pthread_attr_setguardsize.c b/nptl/pthread_attr_setguardsize.c
index 86df9715d8..9a7a984bd9 100644
--- a/nptl/pthread_attr_setguardsize.c
+++ b/nptl/pthread_attr_setguardsize.c
@@ -21,9 +21,7 @@
 
 
 int
-pthread_attr_setguardsize (attr, guardsize)
-     pthread_attr_t *attr;
-     size_t guardsize;
+pthread_attr_setguardsize (pthread_attr_t *attr, size_t guardsize)
 {
   struct pthread_attr *iattr;
 
diff --git a/nptl/pthread_attr_setinheritsched.c b/nptl/pthread_attr_setinheritsched.c
index 477072d8de..c66a4e3d38 100644
--- a/nptl/pthread_attr_setinheritsched.c
+++ b/nptl/pthread_attr_setinheritsched.c
@@ -22,9 +22,7 @@
 
 
 int
-__pthread_attr_setinheritsched (attr, inherit)
-     pthread_attr_t *attr;
-     int inherit;
+__pthread_attr_setinheritsched (pthread_attr_t *attr, int inherit)
 {
   struct pthread_attr *iattr;
 
diff --git a/nptl/pthread_attr_setschedparam.c b/nptl/pthread_attr_setschedparam.c
index f6347a78c8..d6ac0fffb2 100644
--- a/nptl/pthread_attr_setschedparam.c
+++ b/nptl/pthread_attr_setschedparam.c
@@ -23,9 +23,8 @@
 
 
 int
-__pthread_attr_setschedparam (attr, param)
-     pthread_attr_t *attr;
-     const struct sched_param *param;
+__pthread_attr_setschedparam (pthread_attr_t *attr,
+			      const struct sched_param *param)
 {
   assert (sizeof (*attr) >= sizeof (struct pthread_attr));
   struct pthread_attr *iattr = (struct pthread_attr *) attr;
diff --git a/nptl/pthread_attr_setschedpolicy.c b/nptl/pthread_attr_setschedpolicy.c
index 70f439590f..8bc9ed20fb 100644
--- a/nptl/pthread_attr_setschedpolicy.c
+++ b/nptl/pthread_attr_setschedpolicy.c
@@ -22,9 +22,7 @@
 
 
 int
-__pthread_attr_setschedpolicy (attr, policy)
-     pthread_attr_t *attr;
-     int policy;
+__pthread_attr_setschedpolicy (pthread_attr_t *attr, int policy)
 {
   struct pthread_attr *iattr;
 
diff --git a/nptl/pthread_attr_setscope.c b/nptl/pthread_attr_setscope.c
index 8f510bfec2..7559d105db 100644
--- a/nptl/pthread_attr_setscope.c
+++ b/nptl/pthread_attr_setscope.c
@@ -22,9 +22,7 @@
 
 
 int
-__pthread_attr_setscope (attr, scope)
-     pthread_attr_t *attr;
-     int scope;
+__pthread_attr_setscope (pthread_attr_t *attr, int scope)
 {
   struct pthread_attr *iattr;
 
diff --git a/nptl/pthread_attr_setstack.c b/nptl/pthread_attr_setstack.c
index 6898f72540..c44c383aa7 100644
--- a/nptl/pthread_attr_setstack.c
+++ b/nptl/pthread_attr_setstack.c
@@ -28,10 +28,8 @@
 
 
 int
-__pthread_attr_setstack (attr, stackaddr, stacksize)
-     pthread_attr_t *attr;
-     void *stackaddr;
-     size_t stacksize;
+__pthread_attr_setstack (pthread_attr_t *attr, void *stackaddr,
+			 size_t stacksize)
 {
   struct pthread_attr *iattr;
 
diff --git a/nptl/pthread_attr_setstackaddr.c b/nptl/pthread_attr_setstackaddr.c
index 2c028a54fa..ab0d7d2a33 100644
--- a/nptl/pthread_attr_setstackaddr.c
+++ b/nptl/pthread_attr_setstackaddr.c
@@ -22,9 +22,7 @@
 
 
 int
-__pthread_attr_setstackaddr (attr, stackaddr)
-     pthread_attr_t *attr;
-     void *stackaddr;
+__pthread_attr_setstackaddr (pthread_attr_t *attr, void *stackaddr)
 {
   struct pthread_attr *iattr;
 
diff --git a/nptl/pthread_attr_setstacksize.c b/nptl/pthread_attr_setstacksize.c
index a0cda0cbce..d3d109a232 100644
--- a/nptl/pthread_attr_setstacksize.c
+++ b/nptl/pthread_attr_setstacksize.c
@@ -27,9 +27,7 @@
 
 
 int
-__pthread_attr_setstacksize (attr, stacksize)
-     pthread_attr_t *attr;
-     size_t stacksize;
+__pthread_attr_setstacksize (pthread_attr_t *attr, size_t stacksize)
 {
   struct pthread_attr *iattr;
 
diff --git a/nptl/pthread_condattr_setclock.c b/nptl/pthread_condattr_setclock.c
index 0748d78d05..5300844d06 100644
--- a/nptl/pthread_condattr_setclock.c
+++ b/nptl/pthread_condattr_setclock.c
@@ -25,9 +25,7 @@
 
 
 int
-pthread_condattr_setclock (attr, clock_id)
-     pthread_condattr_t *attr;
-     clockid_t clock_id;
+pthread_condattr_setclock (pthread_condattr_t *attr, clockid_t clock_id)
 {
   /* Only a few clocks are allowed.  */
   if (clock_id != CLOCK_MONOTONIC && clock_id != CLOCK_REALTIME)
diff --git a/nptl/pthread_create.c b/nptl/pthread_create.c
index d10f4ea800..790f46db3f 100644
--- a/nptl/pthread_create.c
+++ b/nptl/pthread_create.c
@@ -80,8 +80,7 @@ static int create_thread (struct pthread *pd, const struct pthread_attr *attr,
 
 struct pthread *
 internal_function
-__find_in_stack_list (pd)
-     struct pthread *pd;
+__find_in_stack_list (struct pthread *pd)
 {
   list_t *entry;
   struct pthread *result = NULL;
diff --git a/nptl/pthread_getattr_np.c b/nptl/pthread_getattr_np.c
index 52a4602730..5ebff5cbbc 100644
--- a/nptl/pthread_getattr_np.c
+++ b/nptl/pthread_getattr_np.c
@@ -30,9 +30,7 @@
 
 
 int
-pthread_getattr_np (thread_id, attr)
-     pthread_t thread_id;
-     pthread_attr_t *attr;
+pthread_getattr_np (pthread_t thread_id, pthread_attr_t *attr)
 {
   struct pthread *thread = (struct pthread *) thread_id;
   struct pthread_attr *iattr = (struct pthread_attr *) attr;
diff --git a/nptl/pthread_mutex_cond_lock.c b/nptl/pthread_mutex_cond_lock.c
index 7b6fbc18aa..2ac421fd63 100644
--- a/nptl/pthread_mutex_cond_lock.c
+++ b/nptl/pthread_mutex_cond_lock.c
@@ -14,7 +14,7 @@
 #define LLL_ROBUST_MUTEX_LOCK(mutex, id) \
   lll_robust_cond_lock ((mutex)->__data.__lock, id, \
 			PTHREAD_ROBUST_MUTEX_PSHARED (mutex))
-#define __pthread_mutex_lock __pthread_mutex_cond_lock
+#define __pthread_mutex_lock internal_function __pthread_mutex_cond_lock
 #define __pthread_mutex_lock_full __pthread_mutex_cond_lock_full
 #define NO_INCR
 
diff --git a/nptl/pthread_mutex_init.c b/nptl/pthread_mutex_init.c
index d71cfef0f7..45c159bad3 100644
--- a/nptl/pthread_mutex_init.c
+++ b/nptl/pthread_mutex_init.c
@@ -55,9 +55,8 @@ prio_inherit_missing (void)
 }
 
 int
-__pthread_mutex_init (mutex, mutexattr)
-     pthread_mutex_t *mutex;
-     const pthread_mutexattr_t *mutexattr;
+__pthread_mutex_init (pthread_mutex_t *mutex,
+		      const pthread_mutexattr_t *mutexattr)
 {
   const struct pthread_mutexattr *imutexattr;
 
diff --git a/nptl/pthread_mutex_lock.c b/nptl/pthread_mutex_lock.c
index 9a3b46624d..493fe43778 100644
--- a/nptl/pthread_mutex_lock.c
+++ b/nptl/pthread_mutex_lock.c
@@ -60,8 +60,7 @@ static int __pthread_mutex_lock_full (pthread_mutex_t *mutex)
      __attribute_noinline__;
 
 int
-__pthread_mutex_lock (mutex)
-     pthread_mutex_t *mutex;
+__pthread_mutex_lock (pthread_mutex_t *mutex)
 {
   assert (sizeof (mutex->__size) >= sizeof (mutex->__data));
 
@@ -521,8 +520,8 @@ hidden_def (__pthread_mutex_lock)
 
 #ifdef NO_INCR
 void
-__pthread_mutex_cond_lock_adjust (mutex)
-     pthread_mutex_t *mutex;
+internal_function
+__pthread_mutex_cond_lock_adjust (pthread_mutex_t *mutex)
 {
   assert ((mutex->__data.__kind & PTHREAD_MUTEX_PRIO_INHERIT_NP) != 0);
   assert ((mutex->__data.__kind & PTHREAD_MUTEX_ROBUST_NORMAL_NP) == 0);
diff --git a/nptl/pthread_mutex_timedlock.c b/nptl/pthread_mutex_timedlock.c
index f0fb03e90b..370a232773 100644
--- a/nptl/pthread_mutex_timedlock.c
+++ b/nptl/pthread_mutex_timedlock.c
@@ -41,9 +41,8 @@
 #endif
 
 int
-pthread_mutex_timedlock (mutex, abstime)
-     pthread_mutex_t *mutex;
-     const struct timespec *abstime;
+pthread_mutex_timedlock (pthread_mutex_t *mutex,
+			 const struct timespec *abstime)
 {
   int oldval;
   pid_t id = THREAD_GETMEM (THREAD_SELF, tid);
diff --git a/nptl/pthread_mutex_trylock.c b/nptl/pthread_mutex_trylock.c
index 33df384bd0..17ec2302ec 100644
--- a/nptl/pthread_mutex_trylock.c
+++ b/nptl/pthread_mutex_trylock.c
@@ -31,8 +31,7 @@
 #endif
 
 int
-__pthread_mutex_trylock (mutex)
-     pthread_mutex_t *mutex;
+__pthread_mutex_trylock (pthread_mutex_t *mutex)
 {
   int oldval;
   pid_t id = THREAD_GETMEM (THREAD_SELF, tid);
diff --git a/nptl/pthread_mutex_unlock.c b/nptl/pthread_mutex_unlock.c
index 9e864c1832..c078f7ebe3 100644
--- a/nptl/pthread_mutex_unlock.c
+++ b/nptl/pthread_mutex_unlock.c
@@ -34,9 +34,7 @@ __pthread_mutex_unlock_full (pthread_mutex_t *mutex, int decr)
 
 int
 internal_function attribute_hidden
-__pthread_mutex_unlock_usercnt (mutex, decr)
-     pthread_mutex_t *mutex;
-     int decr;
+__pthread_mutex_unlock_usercnt (pthread_mutex_t *mutex, int decr)
 {
   int type = PTHREAD_MUTEX_TYPE_ELISION (mutex);
   if (__builtin_expect (type &
@@ -309,8 +307,7 @@ __pthread_mutex_unlock_full (pthread_mutex_t *mutex, int decr)
 
 
 int
-__pthread_mutex_unlock (mutex)
-     pthread_mutex_t *mutex;
+__pthread_mutex_unlock (pthread_mutex_t *mutex)
 {
   return __pthread_mutex_unlock_usercnt (mutex, 1);
 }
diff --git a/nptl_db/td_ta_clear_event.c b/nptl_db/td_ta_clear_event.c
index 368c21eca8..9279837dd9 100644
--- a/nptl_db/td_ta_clear_event.c
+++ b/nptl_db/td_ta_clear_event.c
@@ -22,9 +22,7 @@
 
 
 td_err_e
-td_ta_clear_event (ta_arg, event)
-     const td_thragent_t *ta_arg;
-     td_thr_events_t *event;
+td_ta_clear_event (const td_thragent_t *ta_arg, td_thr_events_t *event)
 {
   td_thragent_t *const ta = (td_thragent_t *) ta_arg;
   td_err_e err;
diff --git a/nptl_db/td_ta_set_event.c b/nptl_db/td_ta_set_event.c
index 132363d831..157e022b83 100644
--- a/nptl_db/td_ta_set_event.c
+++ b/nptl_db/td_ta_set_event.c
@@ -22,9 +22,7 @@
 
 
 td_err_e
-td_ta_set_event (ta_arg, event)
-     const td_thragent_t *ta_arg;
-     td_thr_events_t *event;
+td_ta_set_event (const td_thragent_t *ta_arg, td_thr_events_t *event)
 {
   td_thragent_t *const ta = (td_thragent_t *) ta_arg;
   td_err_e err;
diff --git a/nptl_db/td_thr_clear_event.c b/nptl_db/td_thr_clear_event.c
index 4f81ede8ed..1cd732d4f1 100644
--- a/nptl_db/td_thr_clear_event.c
+++ b/nptl_db/td_thr_clear_event.c
@@ -24,9 +24,7 @@
 
 
 td_err_e
-td_thr_clear_event (th, event)
-     const td_thrhandle_t *th;
-     td_thr_events_t *event;
+td_thr_clear_event (const td_thrhandle_t *th, td_thr_events_t *event)
 {
   td_err_e err;
   psaddr_t eventmask;
diff --git a/nptl_db/td_thr_event_enable.c b/nptl_db/td_thr_event_enable.c
index dba7b3886b..3ee9e1dabe 100644
--- a/nptl_db/td_thr_event_enable.c
+++ b/nptl_db/td_thr_event_enable.c
@@ -21,9 +21,7 @@
 
 
 td_err_e
-td_thr_event_enable (th, onoff)
-     const td_thrhandle_t *th;
-     int onoff;
+td_thr_event_enable (const td_thrhandle_t *th, int onoff)
 {
   LOG ("td_thr_event_enable");
 
diff --git a/nptl_db/td_thr_set_event.c b/nptl_db/td_thr_set_event.c
index bf5f6b7450..64ef046727 100644
--- a/nptl_db/td_thr_set_event.c
+++ b/nptl_db/td_thr_set_event.c
@@ -24,9 +24,7 @@
 
 
 td_err_e
-td_thr_set_event (th, event)
-     const td_thrhandle_t *th;
-     td_thr_events_t *event;
+td_thr_set_event (const td_thrhandle_t *th, td_thr_events_t *event)
 {
   td_err_e err;
   psaddr_t eventmask;
diff --git a/nss/makedb.c b/nss/makedb.c
index c7b466ab43..e53a3ca6ba 100644
--- a/nss/makedb.c
+++ b/nss/makedb.c
@@ -415,11 +415,7 @@ valstr_compare (const void *p1, const void *p2)
 
 
 static int
-process_input (input, inname, to_lowercase, be_quiet)
-     FILE *input;
-     const char *inname;
-     int to_lowercase;
-     int be_quiet;
+process_input (FILE *input, const char *inname, int to_lowercase, int be_quiet)
 {
   char *line;
   size_t linelen;
diff --git a/posix/fnmatch.c b/posix/fnmatch.c
index fd85efa2c7..16d3555a43 100644
--- a/posix/fnmatch.c
+++ b/posix/fnmatch.c
@@ -166,9 +166,7 @@ static int posixly_correct;
 
 # if !defined HAVE___STRCHRNUL && !defined _LIBC
 static char *
-__strchrnul (s, c)
-     const char *s;
-     int c;
+__strchrnul (const char *s, int c)
 {
   char *result = strchr (s, c);
   if (result == NULL)
@@ -179,9 +177,7 @@ __strchrnul (s, c)
 
 # if HANDLE_MULTIBYTE && !defined HAVE___STRCHRNUL && !defined _LIBC
 static wchar_t *
-__wcschrnul (s, c)
-     const wchar_t *s;
-     wint_t c;
+__wcschrnul (const wchar_t *s, wint_t c)
 {
   wchar_t *result = wcschr (s, c);
   if (result == NULL)
@@ -327,10 +323,7 @@ is_char_class (const wchar_t *wcs)
 
 
 int
-fnmatch (pattern, string, flags)
-     const char *pattern;
-     const char *string;
-     int flags;
+fnmatch (const char *pattern, const char *string, int flags)
 {
 # if HANDLE_MULTIBYTE
   if (__builtin_expect (MB_CUR_MAX, 1) != 1)
diff --git a/posix/fnmatch_loop.c b/posix/fnmatch_loop.c
index f46c9dfedb..8d4049d6dc 100644
--- a/posix/fnmatch_loop.c
+++ b/posix/fnmatch_loop.c
@@ -38,14 +38,8 @@ static const CHAR *END (const CHAR *patternp) internal_function;
 
 static int
 internal_function
-FCT (pattern, string, string_end, no_leading_period, flags, ends, alloca_used)
-     const CHAR *pattern;
-     const CHAR *string;
-     const CHAR *string_end;
-     int no_leading_period;
-     int flags;
-     struct STRUCT *ends;
-     size_t alloca_used;
+FCT (const CHAR *pattern, const CHAR *string, const CHAR *string_end,
+     int no_leading_period, int flags, struct STRUCT *ends, size_t alloca_used)
 {
   const CHAR *p = pattern, *n = string;
   UCHAR c;
diff --git a/posix/glob.c b/posix/glob.c
index d65e55dcd6..d178cf0206 100644
--- a/posix/glob.c
+++ b/posix/glob.c
@@ -1267,8 +1267,7 @@ libc_hidden_def (glob)
 
 /* Free storage allocated in PGLOB by a previous `glob' call.  */
 void
-globfree (pglob)
-     glob_t *pglob;
+globfree (glob_t *pglob)
 {
   if (pglob->gl_pathv != NULL)
     {
@@ -1363,9 +1362,7 @@ prefix_array (const char *dirname, char **array, size_t n)
 /* We must not compile this function twice.  */
 #if !defined _LIBC || !defined NO_GLOB_PATTERN_P
 int
-__glob_pattern_type (pattern, quote)
-     const char *pattern;
-     int quote;
+__glob_pattern_type (const char *pattern, int quote)
 {
   const char *p;
   int ret = 0;
@@ -1402,9 +1399,7 @@ __glob_pattern_type (pattern, quote)
 /* Return nonzero if PATTERN contains any metacharacters.
    Metacharacters can be quoted with backslashes if QUOTE is nonzero.  */
 int
-__glob_pattern_p (pattern, quote)
-     const char *pattern;
-     int quote;
+__glob_pattern_p (const char *pattern, int quote)
 {
   return __glob_pattern_type (pattern, quote) == 1;
 }
diff --git a/posix/regcomp.c b/posix/regcomp.c
index bf8aa1604c..c8e0c79219 100644
--- a/posix/regcomp.c
+++ b/posix/regcomp.c
@@ -216,10 +216,8 @@ const size_t __re_error_msgid_idx[] attribute_hidden =
    are set in BUFP on entry.  */
 
 const char *
-re_compile_pattern (pattern, length, bufp)
-    const char *pattern;
-    size_t length;
-    struct re_pattern_buffer *bufp;
+re_compile_pattern (const char *pattern, size_t length,
+		    struct re_pattern_buffer *bufp)
 {
   reg_errcode_t ret;
 
@@ -257,8 +255,7 @@ reg_syntax_t re_syntax_options;
    defined in regex.h.  We return the old syntax.  */
 
 reg_syntax_t
-re_set_syntax (syntax)
-    reg_syntax_t syntax;
+re_set_syntax (reg_syntax_t syntax)
 {
   reg_syntax_t ret = re_syntax_options;
 
@@ -270,8 +267,7 @@ weak_alias (__re_set_syntax, re_set_syntax)
 #endif
 
 int
-re_compile_fastmap (bufp)
-    struct re_pattern_buffer *bufp;
+re_compile_fastmap (struct re_pattern_buffer *bufp)
 {
   re_dfa_t *dfa = (re_dfa_t *) bufp->buffer;
   char *fastmap = bufp->fastmap;
@@ -469,10 +465,7 @@ re_compile_fastmap_iter (regex_t *bufp, const re_dfastate_t *init_state,
    the return codes and their meanings.)  */
 
 int
-regcomp (preg, pattern, cflags)
-    regex_t *__restrict preg;
-    const char *__restrict pattern;
-    int cflags;
+regcomp (regex_t *__restrict preg, const char *__restrict pattern, int cflags)
 {
   reg_errcode_t ret;
   reg_syntax_t syntax = ((cflags & REG_EXTENDED) ? RE_SYNTAX_POSIX_EXTENDED
@@ -531,11 +524,8 @@ weak_alias (__regcomp, regcomp)
    from either regcomp or regexec.   We don't use PREG here.  */
 
 size_t
-regerror (errcode, preg, errbuf, errbuf_size)
-    int errcode;
-    const regex_t *__restrict preg;
-    char *__restrict errbuf;
-    size_t errbuf_size;
+regerror (int errcode, const regex_t *__restrict preg, char *__restrict errbuf,
+	  size_t errbuf_size)
 {
   const char *msg;
   size_t msg_size;
@@ -639,8 +629,7 @@ free_dfa_content (re_dfa_t *dfa)
 /* Free dynamically allocated space used by PREG.  */
 
 void
-regfree (preg)
-    regex_t *preg;
+regfree (regex_t *preg)
 {
   re_dfa_t *dfa = (re_dfa_t *) preg->buffer;
   if (BE (dfa != NULL, 1))
diff --git a/posix/regexec.c b/posix/regexec.c
index 70cd6064dd..f748a314bb 100644
--- a/posix/regexec.c
+++ b/posix/regexec.c
@@ -219,12 +219,8 @@ static reg_errcode_t extend_buffers (re_match_context_t *mctx, int min_len)
    We return 0 if we find a match and REG_NOMATCH if not.  */
 
 int
-regexec (preg, string, nmatch, pmatch, eflags)
-    const regex_t *__restrict preg;
-    const char *__restrict string;
-    size_t nmatch;
-    regmatch_t pmatch[];
-    int eflags;
+regexec (const regex_t *__restrict preg, const char *__restrict string,
+	 size_t nmatch, regmatch_t pmatch[], int eflags)
 {
   reg_errcode_t err;
   int start, length;
@@ -305,11 +301,8 @@ compat_symbol (libc, __compat_regexec, regexec, GLIBC_2_0);
    match was found and -2 indicates an internal error.  */
 
 int
-re_match (bufp, string, length, start, regs)
-    struct re_pattern_buffer *bufp;
-    const char *string;
-    int length, start;
-    struct re_registers *regs;
+re_match (struct re_pattern_buffer *bufp, const char *string, int length,
+	  int start, struct re_registers *regs)
 {
   return re_search_stub (bufp, string, length, start, 0, length, regs, 1);
 }
@@ -318,11 +311,8 @@ weak_alias (__re_match, re_match)
 #endif
 
 int
-re_search (bufp, string, length, start, range, regs)
-    struct re_pattern_buffer *bufp;
-    const char *string;
-    int length, start, range;
-    struct re_registers *regs;
+re_search (struct re_pattern_buffer *bufp, const char *string, int length,
+	   int start, int range, struct re_registers *regs)
 {
   return re_search_stub (bufp, string, length, start, range, length, regs, 0);
 }
@@ -331,11 +321,9 @@ weak_alias (__re_search, re_search)
 #endif
 
 int
-re_match_2 (bufp, string1, length1, string2, length2, start, regs, stop)
-    struct re_pattern_buffer *bufp;
-    const char *string1, *string2;
-    int length1, length2, start, stop;
-    struct re_registers *regs;
+re_match_2 (struct re_pattern_buffer *bufp, const char *string1, int length1,
+	    const char *string2, int length2, int start,
+	    struct re_registers *regs, int stop)
 {
   return re_search_2_stub (bufp, string1, length1, string2, length2,
 			   start, 0, regs, stop, 1);
@@ -345,11 +333,9 @@ weak_alias (__re_match_2, re_match_2)
 #endif
 
 int
-re_search_2 (bufp, string1, length1, string2, length2, start, range, regs, stop)
-    struct re_pattern_buffer *bufp;
-    const char *string1, *string2;
-    int length1, length2, start, range, stop;
-    struct re_registers *regs;
+re_search_2 (struct re_pattern_buffer *bufp, const char *string1, int length1,
+	     const char *string2, int length2, int start, int range,
+	     struct re_registers *regs, int stop)
 {
   return re_search_2_stub (bufp, string1, length1, string2, length2,
 			   start, range, regs, stop, 0);
@@ -406,11 +392,10 @@ re_search_2_stub (bufp, string1, length1, string2, length2, start, range, regs,
    otherwise the position of the match is returned.  */
 
 static int
-re_search_stub (bufp, string, length, start, range, stop, regs, ret_len)
-    struct re_pattern_buffer *bufp;
-    const char *string;
-    int length, start, range, stop, ret_len;
-    struct re_registers *regs;
+internal_function
+re_search_stub (struct re_pattern_buffer *bufp, const char *string, int length,
+		int start, int range, int stop, struct re_registers *regs,
+		int ret_len)
 {
   reg_errcode_t result;
   regmatch_t *pmatch;
@@ -495,10 +480,9 @@ re_search_stub (bufp, string, length, start, range, stop, regs, ret_len)
 }
 
 static unsigned
-re_copy_regs (regs, pmatch, nregs, regs_allocated)
-    struct re_registers *regs;
-    regmatch_t *pmatch;
-    int nregs, regs_allocated;
+internal_function
+re_copy_regs (struct re_registers *regs, regmatch_t *pmatch, int nregs,
+	      int regs_allocated)
 {
   int rval = REGS_REALLOCATE;
   int i;
@@ -575,11 +559,8 @@ re_copy_regs (regs, pmatch, nregs, regs_allocated)
    freeing the old data.  */
 
 void
-re_set_registers (bufp, regs, num_regs, starts, ends)
-    struct re_pattern_buffer *bufp;
-    struct re_registers *regs;
-    unsigned num_regs;
-    regoff_t *starts, *ends;
+re_set_registers (struct re_pattern_buffer *bufp, struct re_registers *regs,
+		  unsigned num_regs, regoff_t *starts, regoff_t *ends)
 {
   if (num_regs)
     {
@@ -953,9 +934,8 @@ re_search_internal (preg, string, length, start, range, stop, nmatch, pmatch,
 }
 
 static reg_errcode_t
-__attribute_warn_unused_result__
-prune_impossible_nodes (mctx)
-     re_match_context_t *mctx;
+internal_function __attribute_warn_unused_result__
+prune_impossible_nodes (re_match_context_t *mctx)
 {
   const re_dfa_t *const dfa = mctx->dfa;
   int halt_node, match_last;
diff --git a/resolv/inet_net_pton.c b/resolv/inet_net_pton.c
index 14916f83f8..75a8515c15 100644
--- a/resolv/inet_net_pton.c
+++ b/resolv/inet_net_pton.c
@@ -54,11 +54,7 @@ static int	inet_net_pton_ipv4 (const char *src, u_char *dst,
  *	Paul Vixie (ISC), June 1996
  */
 int
-inet_net_pton(af, src, dst, size)
-	int af;
-	const char *src;
-	void *dst;
-	size_t size;
+inet_net_pton (int af, const char *src, void *dst, size_t size)
 {
 	switch (af) {
 	case AF_INET:
@@ -86,10 +82,7 @@ inet_net_pton(af, src, dst, size)
  *	Paul Vixie (ISC), June 1996
  */
 static int
-inet_net_pton_ipv4(src, dst, size)
-	const char *src;
-	u_char *dst;
-	size_t size;
+inet_net_pton_ipv4 (const char *src, u_char *dst, size_t size)
 {
 	static const char xdigits[] = "0123456789abcdef";
 	int n, ch, tmp, dirty, bits;
diff --git a/stdlib/strtod_l.c b/stdlib/strtod_l.c
index da8e4df1ce..f07b0f368b 100644
--- a/stdlib/strtod_l.c
+++ b/stdlib/strtod_l.c
@@ -487,11 +487,8 @@ str_to_mpn (const STRING_TYPE *str, int digcnt, mp_limb_t *n, mp_size_t *nsize,
    return 0.0.  If the number is too big to be represented, set `errno' to
    ERANGE and return HUGE_VAL with the appropriate sign.  */
 FLOAT
-____STRTOF_INTERNAL (nptr, endptr, group, loc)
-     const STRING_TYPE *nptr;
-     STRING_TYPE **endptr;
-     int group;
-     __locale_t loc;
+____STRTOF_INTERNAL (const STRING_TYPE *nptr, STRING_TYPE **endptr, int group,
+		     __locale_t loc)
 {
   int negative;			/* The sign of the number.  */
   MPN_VAR (num);		/* MP representation of the number.  */
diff --git a/sysdeps/pthread/aio_cancel.c b/sysdeps/pthread/aio_cancel.c
index c1e12e4d0f..0106728cd6 100644
--- a/sysdeps/pthread/aio_cancel.c
+++ b/sysdeps/pthread/aio_cancel.c
@@ -38,9 +38,7 @@
 
 
 int
-aio_cancel (fildes, aiocbp)
-     int fildes;
-     struct aiocb *aiocbp;
+aio_cancel (int fildes, struct aiocb *aiocbp)
 {
   struct requestlist *req = NULL;
   int result = AIO_ALLDONE;
diff --git a/sysdeps/pthread/aio_suspend.c b/sysdeps/pthread/aio_suspend.c
index bfca6627f1..40726a8341 100644
--- a/sysdeps/pthread/aio_suspend.c
+++ b/sysdeps/pthread/aio_suspend.c
@@ -105,10 +105,8 @@ do_aio_misc_wait (unsigned int *cntr, const struct timespec *timeout)
 #endif
 
 int
-aio_suspend (list, nent, timeout)
-     const struct aiocb *const list[];
-     int nent;
-     const struct timespec *timeout;
+aio_suspend (const struct aiocb *const list[], int nent,
+	     const struct timespec *timeout)
 {
   if (__glibc_unlikely (nent < 0))
     {
diff --git a/sysdeps/pthread/timer_delete.c b/sysdeps/pthread/timer_delete.c
index ef0133f4ec..49f4c5bc70 100644
--- a/sysdeps/pthread/timer_delete.c
+++ b/sysdeps/pthread/timer_delete.c
@@ -26,8 +26,7 @@
 
 /* Delete timer TIMERID.  */
 int
-timer_delete (timerid)
-     timer_t timerid;
+timer_delete (timer_t timerid)
 {
   struct timer_node *timer;
   int retval = -1;
diff --git a/sysdeps/unix/sysv/linux/dl-openat64.c b/sysdeps/unix/sysv/linux/dl-openat64.c
index 7d100bb321..7eea0ca8c6 100644
--- a/sysdeps/unix/sysv/linux/dl-openat64.c
+++ b/sysdeps/unix/sysv/linux/dl-openat64.c
@@ -23,10 +23,7 @@
 
 
 int
-openat64 (dfd, file, oflag)
-     int dfd;
-     const char *file;
-     int oflag;
+openat64 (int dfd, const char *file, int oflag, ...)
 {
   assert (!__OPEN_NEEDS_MODE (oflag));
 
diff --git a/time/strptime_l.c b/time/strptime_l.c
index c3ce50fe10..454c6ad6c4 100644
--- a/time/strptime_l.c
+++ b/time/strptime_l.c
@@ -41,9 +41,7 @@
 #  define localtime_r my_localtime_r
 static struct tm *localtime_r (const time_t *, struct tm *);
 static struct tm *
-localtime_r (t, tp)
-     const time_t *t;
-     struct tm *tp;
+localtime_r (const time_t *t, struct tm *tp)
 {
   struct tm *l = localtime (t);
   if (! l)
diff --git a/wcsmbs/mbsnrtowcs.c b/wcsmbs/mbsnrtowcs.c
index 9c354a939b..73a5c7f0c5 100644
--- a/wcsmbs/mbsnrtowcs.c
+++ b/wcsmbs/mbsnrtowcs.c
@@ -38,12 +38,8 @@ static mbstate_t state;
    implementation of stdio because we have to deal with unterminated
    buffers.  At most NMC bytes will be converted.  */
 size_t
-__mbsnrtowcs (dst, src, nmc, len, ps)
-     wchar_t *dst;
-     const char **src;
-     size_t nmc;
-     size_t len;
-     mbstate_t *ps;
+__mbsnrtowcs (wchar_t *dst, const char **src, size_t nmc, size_t len,
+	      mbstate_t *ps)
 {
   const unsigned char *srcend;
   struct __gconv_step_data data;
diff --git a/wcsmbs/mbsrtowcs_l.c b/wcsmbs/mbsrtowcs_l.c
index 557b3ed7bc..d71934117d 100644
--- a/wcsmbs/mbsrtowcs_l.c
+++ b/wcsmbs/mbsrtowcs_l.c
@@ -37,12 +37,8 @@
 
 size_t
 attribute_hidden
-__mbsrtowcs_l (dst, src, len, ps, l)
-     wchar_t *dst;
-     const char **src;
-     size_t len;
-     mbstate_t *ps;
-     __locale_t l;
+__mbsrtowcs_l (wchar_t *dst, const char **src, size_t len, mbstate_t *ps,
+	       __locale_t l)
 {
   struct __gconv_step_data data;
   size_t result;
diff --git a/wcsmbs/wcsnrtombs.c b/wcsmbs/wcsnrtombs.c
index df83c94391..f257693aba 100644
--- a/wcsmbs/wcsnrtombs.c
+++ b/wcsmbs/wcsnrtombs.c
@@ -37,12 +37,8 @@ static mbstate_t state;
    implementation of stdio because we have to deal with unterminated
    buffers.  At most NWC wide character will be converted.  */
 size_t
-__wcsnrtombs (dst, src, nwc, len, ps)
-     char *dst;
-     const wchar_t **src;
-     size_t nwc;
-     size_t len;
-     mbstate_t *ps;
+__wcsnrtombs (char *dst, const wchar_t **src, size_t nwc, size_t len,
+	      mbstate_t *ps)
 {
   struct __gconv_step_data data;
   const wchar_t *srcend;
diff --git a/wcsmbs/wcsrtombs.c b/wcsmbs/wcsrtombs.c
index bc8e7b8141..ae30368338 100644
--- a/wcsmbs/wcsrtombs.c
+++ b/wcsmbs/wcsrtombs.c
@@ -35,11 +35,7 @@
 static mbstate_t state;
 
 size_t
-__wcsrtombs (dst, src, len, ps)
-     char *dst;
-     const wchar_t **src;
-     size_t len;
-     mbstate_t *ps;
+__wcsrtombs (char *dst, const wchar_t **src, size_t len, mbstate_t *ps)
 {
   struct __gconv_step_data data;
   int status;