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authorPeter Fritzsche <peter.fritzsche@gmx.de>2010-05-24 14:33:09 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2010-05-25 08:07:03 -0700
commit37682177af68478fa83429b735fa16913c2fbb2b (patch)
tree989ad96f1e5ca0b47e1a44111e1eb110a33a79eb /include/asm-generic/atomic.h
parentfc62f2f19edf46c9bdbd1a54725b56b18c43e94f (diff)
downloadlinux-37682177af68478fa83429b735fa16913c2fbb2b.tar.bz2
asm-generic: don't warn that atomic_t is only 24 bit
32-bit Sparc used to only allow usage of 24-bit of it's atomic_t type. This was corrected with linux 2.6.3 when Keith M Wesolowski changed the implementation to use the parisc approach of having an array of spinlocks to protect the atomic_t. These warnings were also removed from the sparc implementation when the new implementation was merged in BKrev:402e4949VThdc6D3iaosSFUgabMfvw, but the warning still remained in some other places without any 24-bit-only atomic_t implementation inside the kernel. We should remove these warnings to allow users to rely on the full 32-bit range of atomic_t. Signed-off-by: Peter Fritzsche <peter.fritzsche@gmx.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/atomic.h')
-rw-r--r--include/asm-generic/atomic.h8
1 files changed, 2 insertions, 6 deletions
diff --git a/include/asm-generic/atomic.h b/include/asm-generic/atomic.h
index c33749f95b32..058129e9b04c 100644
--- a/include/asm-generic/atomic.h
+++ b/include/asm-generic/atomic.h
@@ -30,8 +30,7 @@
* atomic_read - read atomic variable
* @v: pointer of type atomic_t
*
- * Atomically reads the value of @v. Note that the guaranteed
- * useful range of an atomic_t is only 24 bits.
+ * Atomically reads the value of @v.
*/
#define atomic_read(v) (*(volatile int *)&(v)->counter)
@@ -40,8 +39,7 @@
* @v: pointer of type atomic_t
* @i: required value
*
- * Atomically sets the value of @v to @i. Note that the guaranteed
- * useful range of an atomic_t is only 24 bits.
+ * Atomically sets the value of @v to @i.
*/
#define atomic_set(v, i) (((v)->counter) = (i))
@@ -53,7 +51,6 @@
* @v: pointer of type atomic_t
*
* Atomically adds @i to @v and returns the result
- * Note that the guaranteed useful range of an atomic_t is only 24 bits.
*/
static inline int atomic_add_return(int i, atomic_t *v)
{
@@ -75,7 +72,6 @@ static inline int atomic_add_return(int i, atomic_t *v)
* @v: pointer of type atomic_t
*
* Atomically subtracts @i from @v and returns the result
- * Note that the guaranteed useful range of an atomic_t is only 24 bits.
*/
static inline int atomic_sub_return(int i, atomic_t *v)
{