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

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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>
This commit is contained in:
David S. Miller 2006-01-31 18:35:05 -08:00 committed by David S. Miller
parent 86b818687d
commit 30a6ecad96
1 changed files with 1 additions and 1 deletions
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2
arch/sparc64/kernel/winfixup.S
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@ -160,7 +160,7 @@ spill_fixup:
andcc %g1, TSTATE_PRIV, %g0 andcc %g1, TSTATE_PRIV, %g0
saved saved
and %g1, TSTATE_CWP, %g1 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 mov FAULT_CODE_WRITE | FAULT_CODE_DTLB | FAULT_CODE_WINFIXUP, %g4
retry retry