diff options
Diffstat (limited to 'arch/x86_64/lib/thunk.S')
| -rw-r--r-- | arch/x86_64/lib/thunk.S | 30 |
1 files changed, 0 insertions, 30 deletions
diff --git a/arch/x86_64/lib/thunk.S b/arch/x86_64/lib/thunk.S index 332ea5dff916..6cff27c775ae 100644 --- a/arch/x86_64/lib/thunk.S +++ b/arch/x86_64/lib/thunk.S | |||
| @@ -67,33 +67,3 @@ restore_norax: | |||
| 67 | RESTORE_ARGS 1 | 67 | RESTORE_ARGS 1 |
| 68 | ret | 68 | ret |
| 69 | CFI_ENDPROC | 69 | CFI_ENDPROC |
| 70 | |||
| 71 | #ifdef CONFIG_SMP | ||
| 72 | /* Support for read/write spinlocks. */ | ||
| 73 | .text | ||
| 74 | /* rax: pointer to rwlock_t */ | ||
| 75 | ENTRY(__write_lock_failed) | ||
| 76 | lock | ||
| 77 | addl $RW_LOCK_BIAS,(%rax) | ||
| 78 | 1: rep | ||
| 79 | nop | ||
| 80 | cmpl $RW_LOCK_BIAS,(%rax) | ||
| 81 | jne 1b | ||
| 82 | lock | ||
| 83 | subl $RW_LOCK_BIAS,(%rax) | ||
| 84 | jnz __write_lock_failed | ||
| 85 | ret | ||
| 86 | |||
| 87 | /* rax: pointer to rwlock_t */ | ||
| 88 | ENTRY(__read_lock_failed) | ||
| 89 | lock | ||
| 90 | incl (%rax) | ||
| 91 | 1: rep | ||
| 92 | nop | ||
| 93 | cmpl $1,(%rax) | ||
| 94 | js 1b | ||
| 95 | lock | ||
| 96 | decl (%rax) | ||
| 97 | js __read_lock_failed | ||
| 98 | ret | ||
| 99 | #endif | ||