linux-kernel - [PATCH] selftests: memfd: Align STACK

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Date:   Thu, 10 Aug 2017 19:04:47 +0800
From:   Orson Zhai <orson.zhai@...aro.org>
To:     Shuah Khan <shuah@...nel.org>
CC:     <linux-kselftest@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <sumit.semwal@...aro.org>, <chunyan.zhang@...eadtrum.com>,
        Orson Zhai <orson.zhai@...aro.org>
Subject: [PATCH] selftests: memfd: Align STACK_SIZE for ARM AArch64 system

The stack size should be 16 bytes aligned in arm64 system. The similar
patch has been merged already.

> <commit id: 1f78dda2cf5e4eeb00aee2a01c9515e2e704b4c0>
> selftests: memfd_test: Revised STACK_SIZE to make it 16-byte aligned
>
>    There is a mandate of 16-byte aligned stack on AArch64 [1], so the
>    STACK_SIZE here should also be 16-byte aligned, otherwise we would
>    get an error when calling clone().
>
>    [1] http://lxr.free-electrons.com/source/arch/arm64/kernel/process.c#L265
>
>    Signed-off-by: Chunyan Zhang <zhang.chunyan@...aro.org>
>    Acked-by: Arnd Bergmann <arnd@...db.de>
>    Signed-off-by: Shuah Khan <shuahkh@....samsung.com>

Signed-off-by: Orson Zhai <orson.zhai@...aro.org>
---
 tools/testing/selftests/memfd/fuse_test.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/memfd/fuse_test.c b/tools/testing/selftests/memfd/fuse_test.c
index 67908b18f035..7f3617274bf5 100644
--- a/tools/testing/selftests/memfd/fuse_test.c
+++ b/tools/testing/selftests/memfd/fuse_test.c
@@ -33,7 +33,7 @@
 #include <unistd.h>
 
 #define MFD_DEF_SIZE 8192
-#define STACK_SIZE 65535
+#define STACK_SIZE 65536
 
 static int sys_memfd_create(const char *name,
 			    unsigned int flags)
-- 
2.12.2