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MIPS: Microoptimize arch_{read,write}_lock 

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Ralf Baechle 2011-03-25 18:45:13 +01:00
parent 4bafad922a
commit 756cca61a7
1 changed files with 11 additions and 11 deletions
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22
arch/mips/include/asm/spinlock.h
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@ -245,16 +245,16 @@ static inline void arch_read_lock(arch_rwlock_t *rw)
__asm__ __volatile__(
" .set noreorder # arch_read_lock \n"
"1: ll %1, %2 \n"
" bltz %1, 2f \n"
" bltz %1, 3f \n"
" addu %1, 1 \n"
" sc %1, %0 \n"
"2: sc %1, %0 \n"
" beqz %1, 1b \n"
" nop \n"
" .subsection 2 \n"
"2: ll %1, %2 \n"
" bltz %1, 2b \n"
"3: ll %1, %2 \n"
" bltz %1, 3b \n"
" addu %1, 1 \n"
" b 1b \n"
" b 2b \n"
" nop \n"
" .previous \n"
" .set reorder \n"
@ -324,16 +324,16 @@ static inline void arch_write_lock(arch_rwlock_t *rw)
__asm__ __volatile__(
" .set noreorder # arch_write_lock \n"
"1: ll %1, %2 \n"
" bnez %1, 2f \n"
" bnez %1, 3f \n"
" lui %1, 0x8000 \n"
" sc %1, %0 \n"
" beqz %1, 2f \n"
"2: sc %1, %0 \n"
" beqz %1, 3f \n"
" nop \n"
" .subsection 2 \n"
"2: ll %1, %2 \n"
" bnez %1, 2b \n"
"3: ll %1, %2 \n"
" bnez %1, 3b \n"
" lui %1, 0x8000 \n"
" b 1b \n"
" b 2b \n"
" nop \n"
" .previous \n"
" .set reorder \n"