linux-kernel - [PATCH 3/8] powerpc: fix vdso32 for ppc64le

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Message-Id: <20191108203435.112759-4-arnd@arndb.de>
Date:   Fri,  8 Nov 2019 21:34:26 +0100
From:   Arnd Bergmann <arnd@...db.de>
To:     y2038@...ts.linaro.org,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>
Cc:     linux-kernel@...r.kernel.org, Arnd Bergmann <arnd@...db.de>,
        linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH 3/8] powerpc: fix vdso32 for ppc64le

On little-endian 32-bit application running on 64-bit kernels,
the current vdso would read the wrong half of the xtime seconds
field. Change it to return the lower half like it does on
big-endian.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 arch/powerpc/kernel/vdso32/gettimeofday.S | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/kernel/vdso32/gettimeofday.S b/arch/powerpc/kernel/vdso32/gettimeofday.S
index becd9f8767ed..4327665ad86f 100644
--- a/arch/powerpc/kernel/vdso32/gettimeofday.S
+++ b/arch/powerpc/kernel/vdso32/gettimeofday.S
@@ -13,7 +13,7 @@
 #include <asm/unistd.h>
 
 /* Offset for the low 32-bit part of a field of long type */
-#ifdef CONFIG_PPC64
+#if defined(CONFIG_PPC64) && defined(CONFIG_CPU_BIG_ENDIAN)
 #define LOPART	4
 #define TSPEC_TV_SEC	TSPC64_TV_SEC+LOPART
 #else
-- 
2.20.0