linux-kernel - [PATCH v2 15/17] powerpc/32: Remove MSR

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Message-Id: <f51cbb60271f8f85164cb172c4ec9b986f468953.1553877076.git.christophe.leroy@c-s.fr>
Date:   Fri, 29 Mar 2019 16:38:37 +0000 (UTC)
From:   Christophe Leroy <christophe.leroy@....fr>
To:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Nicholas Piggin <npiggin@...il.com>
Cc:     linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH v2 15/17] powerpc/32: Remove MSR_PR test when returning from
 syscall

syscalls are from user only, so we can account time without checking
whether returning to kernel or user as it will only be user.

Signed-off-by: Christophe Leroy <christophe.leroy@....fr>
---
 arch/powerpc/kernel/entry_32.S | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/arch/powerpc/kernel/entry_32.S b/arch/powerpc/kernel/entry_32.S
index 5f52a71c2838..edd119d3c52b 100644
--- a/arch/powerpc/kernel/entry_32.S
+++ b/arch/powerpc/kernel/entry_32.S
@@ -463,12 +463,7 @@ BEGIN_FTR_SECTION
 	lwarx	r7,0,r1
 END_FTR_SECTION_IFSET(CPU_FTR_NEED_PAIRED_STWCX)
 	stwcx.	r0,0,r1			/* to clear the reservation */
-#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
-	andi.	r4,r8,MSR_PR
-	beq	3f
 	ACCOUNT_CPU_USER_EXIT(r2, r5, r7)
-3:
-#endif
 	lwz	r4,_LINK(r1)
 	lwz	r5,_CCR(r1)
 	mtlr	r4
-- 
2.13.3