kexec: fix compilation warning on xchg(&kexec_lock, 0) in kernel_kexec()

4cd69b98 · Huang Ying <[email protected]> · 2008-08-15 00:40:20 -07:00

kernel/kexec.c: In function 'kernel_kexec':
kernel/kexec.c:1506: warning: value computed is not used

Signed-off-by: Huang Ying <[email protected]>
Cc: "Eric W. Biederman" <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

Commit: 4cd69b986ebf0f8da93f82ffbb89c032ee09c2e1
Parents: ce289e89

Changes

1 files changed · +2 −1

File	Status	Add	Del	Content
kernel/kexec.c	modified	+2	−1	View file

kernel/kexec.c

View file

diff --git a/kernel/kexec.c b/kernel/kexec.c
index c8a4370..cf3797b 100644
--- a/kernel/kexec.c
+++ b/kernel/kexec.c
@@ -1503,7 +1503,8 @@ int kernel_kexec(void)
 	}
 
  Unlock:
-	xchg(&kexec_lock, 0);
+	if (!xchg(&kexec_lock, 0))
+		BUG();
 
 	return error;
 }