I'm wondering if this patch might help people who are seeing locking
problems on SMP boxes ?
Helge
diff --git a/include/asm-parisc/system.h b/include/asm-parisc/system.h
index ee80c92..4752684 100644
--- a/include/asm-parisc/system.h
+++ b/include/asm-parisc/system.h
@@ -168,8 +168,9 @@ static inline void set_eiem(unsigned long val)
/* LDCW, the only atomic read-write operation PA-RISC has. *sigh*. */
#define __ldcw(a) ({ \
unsigned __ret; \
- __asm__ __volatile__(__LDCW " 0(%1),%0" \
- : "=r" (__ret) : "r" (a)); \
+ __asm__ __volatile__(__LDCW " 0(%2),%0" \
+ : "=r" (__ret), "=m" (*(a)) \
+ : "r" (a), "m" (*(a)) ); \
__ret; \
})
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