diff options
Diffstat (limited to 'arch/x86_64/lib/thunk.S')
| -rw-r--r-- | arch/x86_64/lib/thunk.S | 43 |
1 files changed, 6 insertions, 37 deletions
diff --git a/arch/x86_64/lib/thunk.S b/arch/x86_64/lib/thunk.S index 332ea5dff916..0025535cac8d 100644 --- a/arch/x86_64/lib/thunk.S +++ b/arch/x86_64/lib/thunk.S @@ -1,10 +1,9 @@ - /* - * Save registers before calling assembly functions. This avoids - * disturbance of register allocation in some inline assembly constructs. - * Copyright 2001,2002 by Andi Kleen, SuSE Labs. - * Subject to the GNU public license, v.2. No warranty of any kind. - * $Id: thunk.S,v 1.2 2002/03/13 20:06:58 ak Exp $ - */ +/* + * Save registers before calling assembly functions. This avoids + * disturbance of register allocation in some inline assembly constructs. + * Copyright 2001,2002 by Andi Kleen, SuSE Labs. + * Subject to the GNU public license, v.2. No warranty of any kind. + */ #include <linux/config.h> #include <linux/linkage.h> @@ -67,33 +66,3 @@ restore_norax: RESTORE_ARGS 1 ret CFI_ENDPROC - -#ifdef CONFIG_SMP -/* Support for read/write spinlocks. */ - .text -/* rax: pointer to rwlock_t */ -ENTRY(__write_lock_failed) - lock - addl $RW_LOCK_BIAS,(%rax) -1: rep - nop - cmpl $RW_LOCK_BIAS,(%rax) - jne 1b - lock - subl $RW_LOCK_BIAS,(%rax) - jnz __write_lock_failed - ret - -/* rax: pointer to rwlock_t */ -ENTRY(__read_lock_failed) - lock - incl (%rax) -1: rep - nop - cmpl $1,(%rax) - js 1b - lock - decl (%rax) - js __read_lock_failed - ret -#endif |