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| author | Christoph Lameter <clameter@sgi.com> | 2007-12-18 16:22:46 -0800 |
|---|---|---|
| committer | Tony Luck <tony.luck@intel.com> | 2007-12-18 16:22:46 -0800 |
| commit | a3ebdb6c423dff420168a3faf25c76e9e5f59258 (patch) | |
| tree | 397317fda83da7f745d802d5ba87735f163bf1c9 /include/asm-ia64/gcc_intrin.h | |
| parent | c63a1190368771b8207d86c4217ae4afdf1cbd5e (diff) | |
| download | kernel_samsung_smdk4412-a3ebdb6c423dff420168a3faf25c76e9e5f59258.zip kernel_samsung_smdk4412-a3ebdb6c423dff420168a3faf25c76e9e5f59258.tar.gz kernel_samsung_smdk4412-a3ebdb6c423dff420168a3faf25c76e9e5f59258.tar.bz2 | |
IA64: Slim down __clear_bit_unlock
__clear_bit_unlock does not need to perform atomic operations on the
variable. Avoid a cmpxchg and simply do a store with release semantics.
Add a barrier to be safe that the compiler does not do funky things.
Tony: Use intrinsic rather than inline assembler
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Acked-by: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'include/asm-ia64/gcc_intrin.h')
| -rw-r--r-- | include/asm-ia64/gcc_intrin.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/asm-ia64/gcc_intrin.h b/include/asm-ia64/gcc_intrin.h index 4fb4e43..e58d329 100644 --- a/include/asm-ia64/gcc_intrin.h +++ b/include/asm-ia64/gcc_intrin.h @@ -191,6 +191,11 @@ register unsigned long ia64_r13 asm ("r13") __attribute_used__; asm volatile ("ldf.fill %0=[%1]" :"=f"(__f__): "r"(x)); \ }) +#define ia64_st4_rel_nta(m, val) \ +({ \ + asm volatile ("st4.rel.nta [%0] = %1\n\t" :: "r"(m), "r"(val)); \ +}) + #define ia64_stfs(x, regnum) \ ({ \ register double __f__ asm ("f"#regnum); \ |