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| author | John David Anglin <dave.anglin@bell.net> | 2014-08-10 09:54:53 -0400 |
|---|---|---|
| committer | Mike Frysinger <vapier@gentoo.org> | 2015-02-09 10:02:06 -0500 |
| commit | 204f030682dceefc37a29f6915e5175cb45784af (patch) | |
| tree | 11d4283522f5b214e3aec48bf3e88e4d89bf0866 | |
| parent | 1c1d3f4f11b4a911a3b6ffab0aac61d5f8e02873 (diff) | |
| download | glibc-204f030682dceefc37a29f6915e5175cb45784af.tar.gz | |
hppa: fix pthread spinlock
| -rw-r--r-- | sysdeps/hppa/nptl/pthread_spin_init.c | 8 | ||||
| -rw-r--r-- | sysdeps/hppa/nptl/pthread_spin_unlock.c | 8 |
2 files changed, 8 insertions, 8 deletions
diff --git a/sysdeps/hppa/nptl/pthread_spin_init.c b/sysdeps/hppa/nptl/pthread_spin_init.c index 865ef2bfac..a49a8468ca 100644 --- a/sysdeps/hppa/nptl/pthread_spin_init.c +++ b/sysdeps/hppa/nptl/pthread_spin_init.c @@ -20,9 +20,9 @@ int pthread_spin_init (pthread_spinlock_t *lock, int pshared) { - int tmp = 0; - /* This should be a memory barrier to newer compilers */ - __asm__ __volatile__ ("stw,ma %1,0(%0)" - : : "r" (lock), "r" (tmp) : "memory"); + /* The LWS-CAS operation on hppa is a synthetic atomic operation + that doesn't provide the type of coherency that we need. Therefore + we force that coherency by using LWS-CAS again. */ + atomic_exchange_rel (lock, 0); return 0; } diff --git a/sysdeps/hppa/nptl/pthread_spin_unlock.c b/sysdeps/hppa/nptl/pthread_spin_unlock.c index a183fed35e..b576649d2a 100644 --- a/sysdeps/hppa/nptl/pthread_spin_unlock.c +++ b/sysdeps/hppa/nptl/pthread_spin_unlock.c @@ -20,9 +20,9 @@ int pthread_spin_unlock (pthread_spinlock_t *lock) { - int tmp = 0; - /* This should be a memory barrier to newer compilers */ - __asm__ __volatile__ ("stw,ma %1,0(%0)" - : : "r" (lock), "r" (tmp) : "memory"); + /* The LWS-CAS operation on hppa is a synthetic atomic operation + that doesn't provide the type of coherency that we need. Therefore + we force that coherency by using LWS-CAS again. */ + atomic_exchange_rel (lock, 0); return 0; } |