linux-kernel - [PATCH 3/6] asm-generic/atomic.h: add atomic_set

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Message-Id: <1308347614-402-4-git-send-email-vapier@gentoo.org>
Date:	Fri, 17 Jun 2011 17:53:31 -0400
From:	Mike Frysinger <vapier@...too.org>
To:	Arnd Bergmann <arnd@...db.de>,
	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org, Arun Sharma <asharma@...com>,
	uclinux-dist-devel@...ckfin.uclinux.org
Subject: [PATCH 3/6] 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@...too.org>
---
 include/asm-generic/atomic.h |   16 ++++++++++++++++
 1 files changed, 16 insertions(+), 0 deletions(-)

diff --git a/include/asm-generic/atomic.h b/include/asm-generic/atomic.h
index 28f5939..8275ecd 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()
-- 
1.7.5.3

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