[SPARC64]: Don't clobber alt-global %g4 on window fixups.

If we are returning back to kernel mode, %g4 could be live
(for example, in the case where we window spill in the etrap
code).  So do not change it's value if going back to kernel.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 1 deletions

diff --git a/arch/sparc64/kernel/winfixup.S b/arch/sparc64/kernel/winfixup.S
index ade991b7d079..320a762d0519 100644
--- a/arch/sparc64/kernel/winfixup.S
+++ b/arch/sparc64/kernel/winfixup.S
@@ -160,7 +160,7 @@ spill_fixup:
         andcc           %g1, TSTATE_PRIV, %g0
         saved
         and             %g1, TSTATE_CWP, %g1
-        be,pn           %xcc, window_scheisse_from_user_common
+        be,a,pn         %xcc, window_scheisse_from_user_common
          mov            FAULT_CODE_WRITE | FAULT_CODE_DTLB | FAULT_CODE_WINFIXUP, %g4
         retry