powerpc/tm: Remove unnecessary r1 save

We save r1 to the scratch SPR and restore it from there after the trechkpt so saving r1 to the paca is not needed. Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

powerpc/tm: Remove unnecessary r1 save
We save r1 to the scratch SPR and restore it from there after the trechkpt so saving r1 to the paca is not needed. Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Michael Neuling · Benjamin Herrenschmidt
1 parent fb5153d05a
Showing 1 changed file with 0 additions and 2 deletions Side-by-side Diff
arch/powerpc/kernel/tm.S
@@ -320,8 +320,6 @@
 	 */
 	SAVE_NVGPRS(r1)
  
-	std	r1, PACAR1(r13)
-
 	/* Load complete register state from ts_ckpt* registers */
  
 	addi	r7, r3, PT_CKPT_REGS		/* Thread's ckpt_regs */
...	...	@@ -320,8 +320,6 @@
320	320	*/
321	321	SAVE_NVGPRS(r1)
322	322
323		- std r1, PACAR1(r13)
324		-
325	323	/* Load complete register state from ts_ckpt* registers */
326	324
327	325	addi r7, r3, PT_CKPT_REGS /* Thread's ckpt_regs */