[PATCH] Fix the x86_64 implementation of call_rwsem_wait()

[David Howells]

The x86_64 call_rwsem_wait() treats the active state counter part of the R/W
semaphore state as being 16-bit when it's actually 32-bit (it's half of the
64-bit state).  It should do "decl %edx" not "decw %dx".

Signed-off-by: David Howells <dhowells@xxxxxxxxxx>
---

 arch/x86/lib/rwsem_64.S |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/x86/lib/rwsem_64.S b/arch/x86/lib/rwsem_64.S
index 15acecf..41fcf00 100644
--- a/arch/x86/lib/rwsem_64.S
+++ b/arch/x86/lib/rwsem_64.S
@@ -60,7 +60,7 @@ ENTRY(call_rwsem_down_write_failed)
 	ENDPROC(call_rwsem_down_write_failed)
 
 ENTRY(call_rwsem_wake)
-	decw %dx    /* do nothing if still outstanding active readers */
+	decl %edx	/* do nothing if still outstanding active readers */
 	jnz 1f
 	save_common_regs
 	movq %rax,%rdi

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