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| author | Satyam Sharma <ssatyam@cse.iitk.ac.in> | 2007-07-15 23:39:24 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-07-16 09:05:40 -0700 |
| commit | e1f4a88c5a15a86124a95ea712213bb7dab2ad99 (patch) | |
| tree | 7ec29d5eb850629ee11c2ec8cc467877430e9039 /include/linux/spinlock.h | |
| parent | b5d425c97f7d4e92151167b01ca038e7853c6b37 (diff) | |
| download | linux-e1f4a88c5a15a86124a95ea712213bb7dab2ad99.tar.gz linux-e1f4a88c5a15a86124a95ea712213bb7dab2ad99.tar.bz2 linux-e1f4a88c5a15a86124a95ea712213bb7dab2ad99.zip | |
introduce write_trylock_irqsave()
Introduce a write_trylock_irqsave() implementation. Similar in style to
the implementation of spin_trylock_irqsave() in mainline.
Signed-off-by: Satyam Sharma <ssatyam@cse.iitk.ac.in>
Cc: Sripathi Kodi <sripathik@in.ibm.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/spinlock.h')
| -rw-r--r-- | include/linux/spinlock.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/spinlock.h b/include/linux/spinlock.h index a946176db638..c376f3b36c89 100644 --- a/include/linux/spinlock.h +++ b/include/linux/spinlock.h @@ -282,6 +282,13 @@ do { \ 1 : ({ local_irq_restore(flags); 0; }); \ }) +#define write_trylock_irqsave(lock, flags) \ +({ \ + local_irq_save(flags); \ + write_trylock(lock) ? \ + 1 : ({ local_irq_restore(flags); 0; }); \ +}) + /* * Locks two spinlocks l1 and l2. * l1_first indicates if spinlock l1 should be taken first. |