parisc: Avoid interruption in critical region in entry.S

Signed-off-by: John David Anglin <dave.anglin@nrc-cnrc.gc.ca> Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>
xiaoqiangnk · May 30, 2010 · 8f6c0c2 · 8f6c0c2
1 parent 53e30d0
commit 8f6c0c2
Showing 1 changed file with 3 additions and 2 deletions.
diff --git a/arch/parisc/kernel/entry.S b/arch/parisc/kernel/entry.S
@@ -2076,9 +2076,10 @@ syscall_restore:
 	LDREG	TASK_PT_GR31(%r1),%r31	   /* restore syscall rp */
 
 	/* NOTE: We use rsm/ssm pair to make this operation atomic */
+	LDREG   TASK_PT_GR30(%r1),%r1              /* Get user sp */
 	rsm     PSW_SM_I, %r0
-	LDREG   TASK_PT_GR30(%r1),%r30             /* restore user sp */
-	mfsp	%sr3,%r1			   /* Get users space id */
+	copy    %r1,%r30                           /* Restore user sp */
+	mfsp    %sr3,%r1                           /* Get user space id */
 	mtsp    %r1,%sr7                           /* Restore sr7 */
 	ssm     PSW_SM_I, %r0