[PATCH 2/9] powerpc: mark xer clobbered in csum_add()
STALE3867d
From: Christophe Leroy <hidden>
Date: 2015-09-22 14:34:29
Also in:
linuxppc-dev, lkml
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Linus Torvalds
addc uses carry so xer is clobbered in csum_add() Signed-off-by: Christophe Leroy <redacted> --- arch/powerpc/include/asm/checksum.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/powerpc/include/asm/checksum.h b/arch/powerpc/include/asm/checksum.h
index e8d9ef4..d2ca07b 100644
--- a/arch/powerpc/include/asm/checksum.h
+++ b/arch/powerpc/include/asm/checksum.h@@ -141,7 +141,7 @@ static inline __wsum csum_add(__wsum csum, __wsum addend) #else asm("addc %0,%0,%1;" "addze %0,%0;" - : "+r" (csum) : "r" (addend)); + : "+r" (csum) : "r" (addend) : "xer"); return csum; #endif }
--
2.1.0