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