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Nuke the mfsprg2 %r3 after sctrapexit. curlwp is already in %r13 and the 

value fetched to %r3 isn't used.
This commit is contained in:
matt 2011-06-21 05:33:04 +00:00
parent 2d7c053867
commit a93fef591a
1 changed files with 2 additions and 3 deletions
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5
sys/arch/powerpc/booke/trap_subr.S
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@ -1,4 +1,4 @@
/* $NetBSD: trap_subr.S,v 1.5 2011/06/18 06:37:38 matt Exp $ */
/* $NetBSD: trap_subr.S,v 1.6 2011/06/21 05:33:04 matt Exp $ */
/*-
* Copyright (c) 2010, 2011 The NetBSD Foundation, Inc.
* All rights reserved.
@ -34,7 +34,7 @@
* POSSIBILITY OF SUCH DAMAGE.
*/
RCSID("$NetBSD: trap_subr.S,v 1.5 2011/06/18 06:37:38 matt Exp $")
RCSID("$NetBSD: trap_subr.S,v 1.6 2011/06/21 05:33:04 matt Exp $")
.globl _C_LABEL(sctrapexit), _C_LABEL(trapexit), _C_LABEL(intrcall)
@ -466,7 +466,6 @@ _C_LABEL(system_call_vector):
blrl /* syscall(tf) */
_C_LABEL(sctrapexit):
wrteei 0 /* disable interrupts */
mfsprg2 %r3 /* get curlwp */
lwz %r4, L_MD_ASTPENDING(%r13) /* get ast pending */
cmplwi %r4, 0 /* is there an ast pending */
beq+ trapdone /* nope, proceed to exit */