From fc504928677049f0ad3f1fd4e0bb3908172df8f3 Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Wed, 22 Feb 2006 16:15:45 -0800 Subject: [PATCH] [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 --- arch/sparc64/kernel/rtrap.S | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) 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 @@ user_rtt_fill_fixup: mov %g6, %l1 wrpr %g0, 0x0, %tl - wrpr %g0, RTRAP_PSTATE, %pstate 661: nop .section .sun4v_1insn_patch, "ax" @@ -341,6 +340,8 @@ user_rtt_fill_fixup: 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) -- 2.7.4