From 37682177af68478fa83429b735fa16913c2fbb2b Mon Sep 17 00:00:00 2001 From: Peter Fritzsche Date: Mon, 24 May 2010 14:33:09 -0700 Subject: [PATCH] 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 Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/asm-generic/atomic.h | 8 ++------ 1 file 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) { -- 2.20.1