diff options
author | Robin Holt <holt@sgi.com> | 2009-04-02 19:59:46 -0400 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-04-02 22:05:11 -0400 |
commit | f5f7eac41db827a47b2163330eecd7bb55ae9f12 (patch) | |
tree | ae8ab45dba49c1b3d5f2088051389e6fd3e4a24c /kernel/spinlock.c | |
parent | e8c158bb313c1df421eab7dc4299cd39cbbf5895 (diff) |
Allow rwlocks to re-enable interrupts
Pass the original flags to rwlock arch-code, so that it can re-enable
interrupts if implemented for that architecture.
Initially, make __raw_read_lock_flags and __raw_write_lock_flags stubs
which just do the same thing as non-flags variants.
Signed-off-by: Petr Tesarik <ptesarik@suse.cz>
Signed-off-by: Robin Holt <holt@sgi.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: <linux-arch@vger.kernel.org>
Acked-by: Ingo Molnar <mingo@elte.hu>
Cc: "Luck, Tony" <tony.luck@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/spinlock.c')
-rw-r--r-- | kernel/spinlock.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/kernel/spinlock.c b/kernel/spinlock.c index 7283c6dc2d5..7932653c4eb 100644 --- a/kernel/spinlock.c +++ b/kernel/spinlock.c | |||
@@ -121,7 +121,8 @@ unsigned long __lockfunc _read_lock_irqsave(rwlock_t *lock) | |||
121 | local_irq_save(flags); | 121 | local_irq_save(flags); |
122 | preempt_disable(); | 122 | preempt_disable(); |
123 | rwlock_acquire_read(&lock->dep_map, 0, 0, _RET_IP_); | 123 | rwlock_acquire_read(&lock->dep_map, 0, 0, _RET_IP_); |
124 | LOCK_CONTENDED(lock, _raw_read_trylock, _raw_read_lock); | 124 | LOCK_CONTENDED_FLAGS(lock, _raw_read_trylock, _raw_read_lock, |
125 | _raw_read_lock_flags, &flags); | ||
125 | return flags; | 126 | return flags; |
126 | } | 127 | } |
127 | EXPORT_SYMBOL(_read_lock_irqsave); | 128 | EXPORT_SYMBOL(_read_lock_irqsave); |
@@ -151,7 +152,8 @@ unsigned long __lockfunc _write_lock_irqsave(rwlock_t *lock) | |||
151 | local_irq_save(flags); | 152 | local_irq_save(flags); |
152 | preempt_disable(); | 153 | preempt_disable(); |
153 | rwlock_acquire(&lock->dep_map, 0, 0, _RET_IP_); | 154 | rwlock_acquire(&lock->dep_map, 0, 0, _RET_IP_); |
154 | LOCK_CONTENDED(lock, _raw_write_trylock, _raw_write_lock); | 155 | LOCK_CONTENDED_FLAGS(lock, _raw_write_trylock, _raw_write_lock, |
156 | _raw_write_lock_flags, &flags); | ||
155 | return flags; | 157 | return flags; |
156 | } | 158 | } |
157 | EXPORT_SYMBOL(_write_lock_irqsave); | 159 | EXPORT_SYMBOL(_write_lock_irqsave); |