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Add priority inheritance futex support on sparc.
* sysdeps/unix/sysv/linux/sparc/lowlevellock.h (FUTEX_WAIT_REQUEUE_PI): Define. (FUTEX_CMP_REQUEUE_PI): Likewise. (lll_futex_wait_requeue_pi): Likewise. (lll_futex_timed_wait_requeue_pi): Likewise. (lll_futex_cmp_requeue_pi): Likewise.
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@ -1,3 +1,12 @@
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2013-02-21 David S. Miller <davem@davemloft.net>
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* sysdeps/unix/sysv/linux/sparc/lowlevellock.h
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(FUTEX_WAIT_REQUEUE_PI): Define.
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(FUTEX_CMP_REQUEUE_PI): Likewise.
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(lll_futex_wait_requeue_pi): Likewise.
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(lll_futex_timed_wait_requeue_pi): Likewise.
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(lll_futex_cmp_requeue_pi): Likewise.
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2013-02-21 Carlos O'Donell <carlos@redhat.com>
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* sysdeps/unix/sysv/linux/fork.c: Fix comment typo.
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@ -37,6 +37,8 @@
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#define FUTEX_TRYLOCK_PI 8
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#define FUTEX_WAIT_BITSET 9
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#define FUTEX_WAKE_BITSET 10
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#define FUTEX_WAIT_REQUEUE_PI 11
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#define FUTEX_CMP_REQUEUE_PI 12
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#define FUTEX_PRIVATE_FLAG 128
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#define FUTEX_CLOCK_REALTIME 256
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@ -157,6 +159,34 @@ extern void __cpu_relax (void);
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})
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#endif
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/* Priority Inheritance support. */
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#define lll_futex_wait_requeue_pi(futexp, val, mutex, private) \
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lll_futex_timed_wait_requeue_pi (futexp, val, NULL, 0, mutex, private)
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#define lll_futex_timed_wait_requeue_pi(futexp, val, timespec, clockbit, \
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mutex, private) \
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({ \
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INTERNAL_SYSCALL_DECL (__err); \
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long int __ret; \
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int __op = FUTEX_WAIT_REQUEUE_PI | clockbit; \
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\
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__ret = INTERNAL_SYSCALL (futex, __err, 5, (futexp), \
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__lll_private_flag (__op, private), \
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(val), (timespec), mutex); \
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INTERNAL_SYSCALL_ERROR_P (__ret, __err) ? -__ret : __ret; \
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})
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#define lll_futex_cmp_requeue_pi(futexp, nr_wake, nr_move, mutex, val, priv) \
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({ \
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INTERNAL_SYSCALL_DECL (__err); \
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long int __ret; \
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\
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__ret = INTERNAL_SYSCALL (futex, __err, 6, (futexp), \
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__lll_private_flag (FUTEX_CMP_REQUEUE_PI, priv),\
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(nr_wake), (nr_move), (mutex), (val)); \
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INTERNAL_SYSCALL_ERROR_P (__ret, __err); \
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})
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static inline int
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__attribute__ ((always_inline))
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__lll_trylock (int *futex)
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