diff mbox series

[v2,16/17] powerpc/32: don't do syscall stuff in transfer_to_handler

Message ID 7b2c2ab6328b33b3cacc47d24f5cb20b6fcbf96b.1553877076.git.christophe.leroy@c-s.fr (mailing list archive)
State Superseded
Headers show
Series powerpc/32: Implement fast syscall entry | expand

Checks

Context Check Description
snowpatch_ozlabs/apply_patch success Successfully applied on branch next (9e98c678c2d6ae3a17cb2de55d17f69dddaa231b)
snowpatch_ozlabs/checkpatch success total: 0 errors, 0 warnings, 0 checks, 43 lines checked

Commit Message

Christophe Leroy March 29, 2019, 4:38 p.m. UTC
As syscalls are now handled via a fast entry path, syscall related
actions can be removed from the generic transfer_to_handler path.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
---
 arch/powerpc/kernel/entry_32.S | 19 -------------------
 1 file changed, 19 deletions(-)
diff mbox series

Patch

diff --git a/arch/powerpc/kernel/entry_32.S b/arch/powerpc/kernel/entry_32.S
index edd119d3c52b..c648b75f41a3 100644
--- a/arch/powerpc/kernel/entry_32.S
+++ b/arch/powerpc/kernel/entry_32.S
@@ -211,7 +211,6 @@  transfer_to_handler_cont:
 	 */
 	tophys(r12, r1)
 	lwz	r12,_MSR(r12)
-	xor	r12,r10,r12
 	andi.	r12,r12,MSR_EE
 	bne	1f
 
@@ -252,9 +251,6 @@  reenable_mmu:
 	 * the rest is restored from the exception frame.
 	 */
 
-	/* Are we enabling or disabling interrupts ? */
-	andi.	r0,r10,MSR_EE
-
 	stwu	r1,-32(r1)
 	stw	r9,8(r1)
 	stw	r11,12(r1)
@@ -262,8 +258,6 @@  reenable_mmu:
 	stw	r4,20(r1)
 	stw	r5,24(r1)
 
-	bne-	0f
-
 	/* If we are disabling interrupts (normal case), simply log it with
 	 * lockdep
 	 */
@@ -281,19 +275,6 @@  reenable_mmu:
 	mtctr	r11
 	mtlr	r9
 	bctr				/* jump to handler */
-
-	/* If we are enabling interrupt, this is a syscall. They shouldn't
-	 * happen while interrupts are disabled, so let's do a warning here.
-	 */
-0:	trap
-	EMIT_BUG_ENTRY 0b,__FILE__,__LINE__, BUGFLAG_WARNING
-	bl	trace_hardirqs_on
-
-	/* Now enable for real */
-	mfmsr	r10
-	ori	r10,r10,MSR_EE
-	mtmsr	r10
-	b	2b
 #endif /* CONFIG_TRACE_IRQFLAGS */
 
 #if defined (CONFIG_PPC_BOOK3S_32) || defined(CONFIG_E500)