[PATCH] x86_64: Fix segment constraints
Use a register target for segment register saving
Pointed out by H.J.Lu
diff --git a/arch/x86_64/kernel/process.c b/arch/x86_64/kernel/process.c
index 171931e..9922d2b 100644
--- a/arch/x86_64/kernel/process.c
+++ b/arch/x86_64/kernel/process.c
@@ -483,7 +483,7 @@
*/
{
unsigned fsindex;
- asm volatile("movl %%fs,%0" : "=g" (fsindex));
+ asm volatile("movl %%fs,%0" : "=r" (fsindex));
/* segment register != 0 always requires a reload.
also reload when it has changed.
when prev process used 64bit base always reload
@@ -504,7 +504,7 @@
}
{
unsigned gsindex;
- asm volatile("movl %%gs,%0" : "=g" (gsindex));
+ asm volatile("movl %%gs,%0" : "=r" (gsindex));
if (unlikely(gsindex | next->gsindex | prev->gs)) {
load_gs_index(next->gsindex);
if (gsindex)
