[syslinux:lwip] core: thread: return 0 from sem_down() if we didn't have to wait

[syslinux-bot for H. Peter Anvin]

Commit-ID:  10de0b22546489b58ef3588f77be3121a26c0a3e
Gitweb:     http://syslinux.zytor.com/commit/10de0b22546489b58ef3588f77be3121a26c0a3e
Author:     H. Peter Anvin <hpa at zytor.com>
AuthorDate: Wed, 16 Sep 2009 17:47:02 -0700
Committer:  Eric W. Biederman <ebiederm at xmission.com>
CommitDate: Tue, 12 Apr 2011 14:40:52 -0700

core: thread: return 0 from sem_down() if we didn't have to wait

Return 0 from sem_down if we passed right through the assembly code.

Signed-off-by: H. Peter Anvin <hpa at zytor.com>


---
 core/thread/sem_asm.S |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/core/thread/sem_asm.S b/core/thread/sem_asm.S
index 2b3014f..ce67471 100644
--- a/core/thread/sem_asm.S
+++ b/core/thread/sem_asm.S
@@ -3,6 +3,7 @@
 sem_down:
 	decl	(%eax)
 	js	__sem_down_slow
+	xorl	%eax, %eax
 	ret
 	.size	sem_down, .-sem_down