Consolidate non cancellable writev call

This patch consolidates all the non cancellable writev calls to use
the __writev_nocancel identifier.  For non cancellable targets it will
be just a macro to call the default respective symbol while on Linux
will be a internal one.

Checked on x86_64-linux-gnu, x86_64-linux-gnu-x32, and i686-linux-gnu.

	* gmon/gmon.c (write_hist): Replace writev_not_cancel_no_status with
	__writev_nocancel_nostatus.
	(write_call_graph): Likewise.
	(write_bb_counts): Likewise.
	* resolv/herror.c (herror): Likewise.
	* sysdeps/generic/not-cancel.h (writev_not_cancel_no_status): Remove
	macro.
	(__writev_nocancel_nostatus): New macro.
	* sysdeps/unix/sysv/linux/not-cancel.h (writev_not_cancel_no_status):
	Remove macro.
	(__writev_nocancel_nostatus): New function.

ChangeLog

@@ -1,3 +1,17 @@
+2017-08-21  Adhemerval Zanella  <adhemerval.zanella@linaro.org>
+
+	* gmon/gmon.c (write_hist): Replace writev_not_cancel_no_status with
+	__writev_nocancel_nostatus.
+	(write_call_graph): Likewise.
+	(write_bb_counts): Likewise.
+	* resolv/herror.c (herror): Likewise.
+	* sysdeps/generic/not-cancel.h (writev_not_cancel_no_status): Remove
+	macro.
+	(__writev_nocancel_nostatus): New macro.
+	* sysdeps/unix/sysv/linux/not-cancel.h (writev_not_cancel_no_status):
+	Remove macro.
+	(__writev_nocancel_nostatus): New function.
+
 2017-08-21  Joseph Myers  <joseph@codesourcery.com>
 
 	Revert:

gmon/gmon.c

@@ -216,7 +216,7 @@ write_hist (int fd)
       strncpy (thdr.dimen, "seconds", sizeof (thdr.dimen));
       thdr.dimen_abbrev = 's';
 
-      writev_not_cancel_no_status (fd, iov, 3);
+      __writev_nocancel_nostatus (fd, iov, 3);
     }
 }
 
@@ -273,13 +273,13 @@ write_call_graph (int fd)
 
 	  if (++nfilled == NARCS_PER_WRITEV)
 	    {
-	      writev_not_cancel_no_status (fd, iov, 2 * nfilled);
+	      __writev_nocancel_nostatus (fd, iov, 2 * nfilled);
 	      nfilled = 0;
 	    }
 	}
     }
   if (nfilled > 0)
-    writev_not_cancel_no_status (fd, iov, 2 * nfilled);
+    __writev_nocancel_nostatus (fd, iov, 2 * nfilled);
 }
 
 
@@ -312,12 +312,12 @@ write_bb_counts (int fd)
   for (grp = __bb_head; grp; grp = grp->next)
     {
       ncounts = grp->ncounts;
-      writev_not_cancel_no_status (fd, bbhead, 2);
+      __writev_nocancel_nostatus (fd, bbhead, 2);
       for (nfilled = i = 0; i < ncounts; ++i)
 	{
 	  if (nfilled > (sizeof (bbbody) / sizeof (bbbody[0])) - 2)
 	    {
-	      writev_not_cancel_no_status (fd, bbbody, nfilled);
+	      __writev_nocancel_nostatus (fd, bbbody, nfilled);
 	      nfilled = 0;
 	    }
 
@@ -325,7 +325,7 @@ write_bb_counts (int fd)
 	  bbbody[nfilled++].iov_base = &grp->counts[i];
 	}
       if (nfilled > 0)
-	writev_not_cancel_no_status (fd, bbbody, nfilled);
+	__writev_nocancel_nostatus (fd, bbbody, nfilled);
     }
 }
 

resolv/herror.c

@@ -89,7 +89,7 @@ herror(const char *s) {
 	v++;
 	v->iov_base = (char *) "\n";
 	v->iov_len = 1;
-	writev_not_cancel_no_status(STDERR_FILENO, iov, (v - iov) + 1);
+	__writev_nocancel_nostatus(STDERR_FILENO, iov, (v - iov) + 1);
 }
 
 /*

sysdeps/generic/not-cancel.h

@@ -34,7 +34,7 @@
   __read (fd, buf, n)
 #define __write_nocancel(fd, buf, n) \
   __write (fd, buf, n)
-#define writev_not_cancel_no_status(fd, iov, n) \
+#define __writev_nocancel_nostatus(fd, iov, n) \
   (void) __writev (fd, iov, n)
 #define fcntl_not_cancel(fd, cmd, val) \
   __fcntl (fd, cmd, val)

sysdeps/unix/sysv/linux/not-cancel.h

@@ -62,10 +62,14 @@ __close_nocancel_nostatus (int fd)
   __close_nocancel (fd);
 }
 
-/* Uncancelable writev.  */
-#define writev_not_cancel_no_status(fd, iov, n) \
-  (void) ({ INTERNAL_SYSCALL_DECL (err);				      \
-	    INTERNAL_SYSCALL (writev, err, 3, (fd), (iov), (n)); })
+/* Non cancellable writev syscall that does not also set errno in case of
+   failure.  */
+static inline void
+__writev_nocancel_nostatus (int fd, const struct iovec *iov, int iovcnt)
+{
+  INTERNAL_SYSCALL_DECL (err);
+  INTERNAL_SYSCALL_CALL (writev, err, fd, iov, iovcnt);
+}
 
 /* Uncancelable fcntl.  */
 #define fcntl_not_cancel(fd, cmd, val) \