Commit e1f4a88c authored Jul 15, 2007 by Satyam Sharma Committed by Linus Torvalds Jul 16, 2007

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>

parent b5d425c9

include/linux/spinlock.h

+7 −0

Original line number	Diff line number	Diff line
		@@ -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.