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authorMike Frysinger <vapier@gentoo.org>2011-07-26 16:09:10 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-07-26 16:49:48 -0700
commit00b3c28bd753afb46fb26b2f9e21dd27dacd80d4 (patch)
tree461b90948bd8dbd31a1752071c9d0a5cc1412185 /include/asm-generic
parentf6081bd3f8152cdd3d857f55631bbb4b72182b82 (diff)
downloadlinux-linaro-stable-00b3c28bd753afb46fb26b2f9e21dd27dacd80d4.tar.gz
asm-generic/atomic.h: add atomic_set_mask() helper
Since arches are expected to implement this guy, add a common version for people the same way as atomic_clear_mask is handled. Signed-off-by: Mike Frysinger <vapier@gentoo.org> Cc: Arun Sharma <asharma@fb.com> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/asm-generic')
-rw-r--r--include/asm-generic/atomic.h16
1 files changed, 16 insertions, 0 deletions
diff --git a/include/asm-generic/atomic.h b/include/asm-generic/atomic.h
index 4e8ecf0693e9..4c56e0daae9f 100644
--- a/include/asm-generic/atomic.h
+++ b/include/asm-generic/atomic.h
@@ -157,6 +157,22 @@ static inline void atomic_clear_mask(unsigned long mask, atomic_t *v)
raw_local_irq_restore(flags);
}
+/**
+ * atomic_set_mask - Atomically set bits in atomic variable
+ * @mask: Mask of the bits to be set
+ * @v: pointer of type atomic_t
+ *
+ * Atomically sets the bits set in @mask in @v
+ */
+static inline void atomic_set_mask(unsigned int mask, atomic_t *v)
+{
+ unsigned long flags;
+
+ raw_local_irq_save(flags); /* Don't trace it in a irqsoff handler */
+ v->counter |= mask;
+ raw_local_irq_restore(flags);
+}
+
/* Assume that atomic operations are already serializing */
#define smp_mb__before_atomic_dec() barrier()
#define smp_mb__after_atomic_dec() barrier()