[SPARC64]: Drop %gl to 0 before re-enabling PSTATE_IE in rtrap
If we take a window fault, on SUN4V set %gl to zero before we
turn PSTATE_IE back on in %pstate. Otherwise if we take an
interrupt we'll end up with corrupt register state.
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/sparc64/kernel/rtrap.S b/arch/sparc64/kernel/rtrap.S
index 1e724fe..7130e86 100644
--- a/arch/sparc64/kernel/rtrap.S
+++ b/arch/sparc64/kernel/rtrap.S
@@ -333,7 +333,6 @@
mov %g6, %l1
wrpr %g0, 0x0, %tl
- wrpr %g0, RTRAP_PSTATE, %pstate
661: nop
.section .sun4v_1insn_patch, "ax"
@@ -341,6 +340,8 @@
SET_GL(0)
.previous
+ wrpr %g0, RTRAP_PSTATE, %pstate
+
mov %l1, %g6
ldx [%g6 + TI_TASK], %g4
LOAD_PER_CPU_BASE(%g5, %g6, %g1, %g2, %g3)