This patch fixes a bug of include/asm-m32r/system.h:__cmpxchg_u32().
static __inline__ unsigned long
__cmpxchg_u32(volatile unsigned int *p, unsigned int old, unsigned int new);
In __cmpxchg_u32(), the "old" value must not be changed to the previous "*p"
value. But the former code modifies the previous "*p" value.
A deadlock at _atomic_dec_and_lock sometimes happened due to this bug.
Please apply this patch.
Thanks,
Signed-off-by: Hayato Fujiwara <[email protected]>
Signed-off-by: Hirokazu Takata <[email protected]>
---
include/asm-m32r/system.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
Index: linux-2.6.16-rc3/include/asm-m32r/system.h
===================================================================
--- linux-2.6.16-rc3.orig/include/asm-m32r/system.h 2006-02-17 22:02:08.701003359 +0900
+++ linux-2.6.16-rc3/include/asm-m32r/system.h 2006-02-17 22:04:13.304341309 +0900
@@ -239,7 +239,7 @@ __cmpxchg_u32(volatile unsigned int *p,
" bra 2f; \n"
" .fillinsn \n"
"1:"
- M32R_UNLOCK" %2, @%1; \n"
+ M32R_UNLOCK" %0, @%1; \n"
" .fillinsn \n"
"2:"
: "=&r" (retval)
--
Hirokazu Takata <[email protected]>
Linux/M32R Project: http://www.linux-m32r.org/
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