* [PATCH] make spin_is_locked use an explicit signed char case
@ 2002-07-15 13:10 Christoph Hellwig
0 siblings, 0 replies; only message in thread
From: Christoph Hellwig @ 2002-07-15 13:10 UTC (permalink / raw)
To: Linus Torvalds; +Cc: linux-kernel
This is a trivial patch from the XFS tree and allows to use spinlock
debugging with code that is compiled with -funsigned-char. XFS itself
shouldn't need -funsigned-char anymore, but doing the right thing in
spinlock.h doesn't cost anything.
--- linux/include/asm-i386/spinlock.h~ Sun Jun 23 21:38:01 2002
+++ linux/include/asm-i386/spinlock.h Tue Jun 18 15:10:28 2002
@@ -39,7 +39,7 @@
* We make no fairness assumptions. They have a cost.
*/
-#define spin_is_locked(x) (*(volatile char *)(&(x)->lock) <= 0)
+#define spin_is_locked(x) (*(volatile signed char *)(&(x)->lock) <= 0)
#define spin_unlock_wait(x) do { barrier(); } while(spin_is_locked(x))
#define spin_lock_string \
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2002-07-15 13:10 [PATCH] make spin_is_locked use an explicit signed char case Christoph Hellwig
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