linux-kernel - [PATCH 2/6] asm-generic/atomic.h: fix type used in atomic_clear

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Date:	Fri, 17 Jun 2011 17:53:30 -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 2/6] asm-generic/atomic.h: fix type used in atomic_clear_mask

The atomic helpers are supposed to take an atomic_t pointer, not a
random unsigned long pointer.  So convert atomic_clear_mask over.

While we're here, also add some nice documentation to the func.

Signed-off-by: Mike Frysinger <vapier@...too.org>
---
 include/asm-generic/atomic.h |   11 +++++++++--
 1 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/include/asm-generic/atomic.h b/include/asm-generic/atomic.h
index 5f62e28..28f5939 100644
--- a/include/asm-generic/atomic.h
+++ b/include/asm-generic/atomic.h
@@ -140,13 +140,20 @@ static inline int atomic_add_unless(atomic_t *v, int a, int u)
 
 #define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)
 
-static inline void atomic_clear_mask(unsigned long mask, unsigned long *addr)
+/**
+ * atomic_clear_mask - Atomically clear bits in atomic variable
+ * @mask: Mask of the bits to be cleared
+ * @v: pointer of type atomic_t
+ *
+ * Atomically clears the bits set in @mask from @v
+ */
+static inline void atomic_clear_mask(unsigned long mask, atomic_t *v)
 {
 	unsigned long flags;
 
 	mask = ~mask;
 	raw_local_irq_save(flags); /* Don't trace it in a irqsoff handler */
-	*addr &= mask;
+	v->counter &= mask;
 	raw_local_irq_restore(flags);
 }
 
-- 
1.7.5.3

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