Commit 30a6ecad authored by David S. Miller's avatar David S. Miller Committed by David S. Miller
Browse files

[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: default avatarDavid S. Miller <davem@davemloft.net>
parent 86b81868

arch/sparc64/kernel/winfixup.S

+1 −1
Original line number Diff line number Diff line
@@ -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