linux-kernel - [PATCH 3/5] powerpc/mm: remove a redundant test in do_page

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Date:   Wed, 19 Apr 2017 14:56:28 +0200 (CEST)
From:   Christophe Leroy <christophe.leroy@....fr>
To:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Scott Wood <oss@...error.net>
Cc:     linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH 3/5] powerpc/mm: remove a redundant test in do_page_fault()

The result of (trap == 0x400) is already in is_exec.

Signed-off-by: Christophe Leroy <christophe.leroy@....fr>
---
 arch/powerpc/mm/fault.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/mm/fault.c b/arch/powerpc/mm/fault.c
index 9d21e5fd383d..b56bf472db6d 100644
--- a/arch/powerpc/mm/fault.c
+++ b/arch/powerpc/mm/fault.c
@@ -213,7 +213,7 @@ int do_page_fault(struct pt_regs *regs, unsigned long address,
 	 * bits we are interested in.  But there are some bits which
 	 * indicate errors in DSISR but can validly be set in SRR1.
 	 */
-	if (trap == 0x400)
+	if (is_exec)
 		error_code &= 0x48200000;
 	else
 		is_write = error_code & DSISR_ISSTORE;
-- 
2.12.0