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>

diff --git a/include/asm-generic/atomic.h b/include/asm-generic/atomic.h
index 4e8ecf0693e984162d939e21e1aa7e4bc20bebaa..4c56e0daae9f9974e1ab08ae1eeba4c57b683031 100644 (file)
--- 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()