diff options
author | Jeff Garzik <jeff@garzik.org> | 2007-02-17 15:11:43 -0500 |
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committer | Jeff Garzik <jeff@garzik.org> | 2007-02-17 15:11:43 -0500 |
commit | f630fe2817601314b2eb7ca5ddc23c7834646731 (patch) | |
tree | 3bfb4939b7bbc3859575ca8b58fa3f929b015941 /include/asm-mips/spinlock.h | |
parent | 48c871c1f6a7c7044dd76774fb469e65c7e2e4e8 (diff) | |
parent | 8a03d9a498eaf02c8a118752050a5154852c13bf (diff) |
Merge branch 'master' into upstream
Diffstat (limited to 'include/asm-mips/spinlock.h')
-rw-r--r-- | include/asm-mips/spinlock.h | 56 |
1 files changed, 44 insertions, 12 deletions
diff --git a/include/asm-mips/spinlock.h b/include/asm-mips/spinlock.h index fc3217fc111..f1755d28a36 100644 --- a/include/asm-mips/spinlock.h +++ b/include/asm-mips/spinlock.h @@ -3,7 +3,7 @@ * License. See the file "COPYING" in the main directory of this archive * for more details. * - * Copyright (C) 1999, 2000, 06 by Ralf Baechle + * Copyright (C) 1999, 2000, 06 Ralf Baechle (ralf@linux-mips.org) * Copyright (C) 1999, 2000 Silicon Graphics, Inc. */ #ifndef _ASM_SPINLOCK_H @@ -49,11 +49,18 @@ static inline void __raw_spin_lock(raw_spinlock_t *lock) __asm__ __volatile__( " .set noreorder # __raw_spin_lock \n" "1: ll %1, %2 \n" - " bnez %1, 1b \n" + " bnez %1, 2f \n" " li %1, 1 \n" " sc %1, %0 \n" - " beqz %1, 1b \n" + " beqz %1, 2f \n" " nop \n" + " .subsection 2 \n" + "2: ll %1, %2 \n" + " bnez %1, 2b \n" + " li %1, 1 \n" + " b 1b \n" + " nop \n" + " .previous \n" " .set reorder \n" : "=m" (lock->lock), "=&r" (tmp) : "m" (lock->lock) @@ -99,8 +106,12 @@ static inline unsigned int __raw_spin_trylock(raw_spinlock_t *lock) "1: ll %0, %3 \n" " ori %2, %0, 1 \n" " sc %2, %1 \n" - " beqz %2, 1b \n" + " beqz %2, 2f \n" " andi %2, %0, 1 \n" + " .subsection 2 \n" + "2: b 1b \n" + " nop \n" + " .previous \n" " .set reorder" : "=&r" (temp), "=m" (lock->lock), "=&r" (res) : "m" (lock->lock) @@ -154,11 +165,18 @@ static inline void __raw_read_lock(raw_rwlock_t *rw) __asm__ __volatile__( " .set noreorder # __raw_read_lock \n" "1: ll %1, %2 \n" - " bltz %1, 1b \n" + " bltz %1, 2f \n" " addu %1, 1 \n" " sc %1, %0 \n" " beqz %1, 1b \n" " nop \n" + " .subsection 2 \n" + "2: ll %1, %2 \n" + " bltz %1, 2b \n" + " addu %1, 1 \n" + " b 1b \n" + " nop \n" + " .previous \n" " .set reorder \n" : "=m" (rw->lock), "=&r" (tmp) : "m" (rw->lock) @@ -192,8 +210,12 @@ static inline void __raw_read_unlock(raw_rwlock_t *rw) "1: ll %1, %2 \n" " sub %1, 1 \n" " sc %1, %0 \n" - " beqz %1, 1b \n" + " beqz %1, 2f \n" + " nop \n" + " .subsection 2 \n" + "2: b 1b \n" " nop \n" + " .previous \n" " .set reorder \n" : "=m" (rw->lock), "=&r" (tmp) : "m" (rw->lock) @@ -222,11 +244,18 @@ static inline void __raw_write_lock(raw_rwlock_t *rw) __asm__ __volatile__( " .set noreorder # __raw_write_lock \n" "1: ll %1, %2 \n" - " bnez %1, 1b \n" + " bnez %1, 2f \n" " lui %1, 0x8000 \n" " sc %1, %0 \n" - " beqz %1, 1b \n" + " beqz %1, 2f \n" + " nop \n" + " .subsection 2 \n" + "2: ll %1, %2 \n" + " bnez %1, 2b \n" + " lui %1, 0x8000 \n" + " b 1b \n" " nop \n" + " .previous \n" " .set reorder \n" : "=m" (rw->lock), "=&r" (tmp) : "m" (rw->lock) @@ -322,12 +351,15 @@ static inline int __raw_write_trylock(raw_rwlock_t *rw) " bnez %1, 2f \n" " lui %1, 0x8000 \n" " sc %1, %0 \n" - " beqz %1, 1b \n" - " nop \n" + " beqz %1, 3f \n" + " li %2, 1 \n" + "2: \n" __WEAK_ORDERING_MB - " li %2, 1 \n" + " .subsection 2 \n" + "3: b 1b \n" + " li %2, 0 \n" + " .previous \n" " .set reorder \n" - "2: \n" : "=m" (rw->lock), "=&r" (tmp), "=&r" (ret) : "m" (rw->lock) : "memory"); |