Subject: + syscallsh-use-gcc-alias-instead-of-assembler-aliases-for-syscalls.patch added to -mm tree
To: ak@xxxxxxxxxxxxxxx,geert@xxxxxxxxxxxxxx,penguin-kernel@xxxxxxxxxxxxxxxxxxx,viro@xxxxxxxxxxxxxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Fri, 20 Sep 2013 13:32:27 -0700
The patch titled
Subject: syscalls.h: use gcc alias instead of assembler aliases for syscalls
has been added to the -mm tree. Its filename is
syscallsh-use-gcc-alias-instead-of-assembler-aliases-for-syscalls.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/syscallsh-use-gcc-alias-instead-of-assembler-aliases-for-syscalls.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/syscallsh-use-gcc-alias-instead-of-assembler-aliases-for-syscalls.patch
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------------------------------------------------------
From: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Subject: syscalls.h: use gcc alias instead of assembler aliases for syscalls
Use standard gcc __attribute__((alias(foo))) to define the syscall aliases
instead of custom assembler macros.
This is far cleaner, and also fixes my LTO kernel build.
Signed-off-by: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
Cc: Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/compat.h | 4 ++--
include/linux/syscalls.h | 4 ++--
2 files changed, 4 insertions(+), 4 deletions(-)
diff -puN include/linux/compat.h~syscallsh-use-gcc-alias-instead-of-assembler-aliases-for-syscalls include/linux/compat.h
--- a/include/linux/compat.h~syscallsh-use-gcc-alias-instead-of-assembler-aliases-for-syscalls
+++ a/include/linux/compat.h
@@ -41,14 +41,14 @@
COMPAT_SYSCALL_DEFINEx(6, _##name, __VA_ARGS__)
#define COMPAT_SYSCALL_DEFINEx(x, name, ...) \
- asmlinkage long compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));\
+ asmlinkage long compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))\
+ __attribute__((alias(__stringify(compat_SyS##name)))); \
static inline long C_SYSC##name(__MAP(x,__SC_DECL,__VA_ARGS__));\
asmlinkage long compat_SyS##name(__MAP(x,__SC_LONG,__VA_ARGS__));\
asmlinkage long compat_SyS##name(__MAP(x,__SC_LONG,__VA_ARGS__))\
{ \
return C_SYSC##name(__MAP(x,__SC_DELOUSE,__VA_ARGS__)); \
} \
- SYSCALL_ALIAS(compat_sys##name, compat_SyS##name); \
static inline long C_SYSC##name(__MAP(x,__SC_DECL,__VA_ARGS__))
#ifndef compat_user_stack_pointer
diff -puN include/linux/syscalls.h~syscallsh-use-gcc-alias-instead-of-assembler-aliases-for-syscalls include/linux/syscalls.h
--- a/include/linux/syscalls.h~syscallsh-use-gcc-alias-instead-of-assembler-aliases-for-syscalls
+++ a/include/linux/syscalls.h
@@ -184,7 +184,8 @@ extern struct trace_event_functions exit
#define __PROTECT(...) asmlinkage_protect(__VA_ARGS__)
#define __SYSCALL_DEFINEx(x, name, ...) \
- asmlinkage long sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)); \
+ asmlinkage long sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) \
+ __attribute__((alias(__stringify(SyS##name)))); \
static inline long SYSC##name(__MAP(x,__SC_DECL,__VA_ARGS__)); \
asmlinkage long SyS##name(__MAP(x,__SC_LONG,__VA_ARGS__)); \
asmlinkage long SyS##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
@@ -194,7 +195,6 @@ extern struct trace_event_functions exit
__PROTECT(x, ret,__MAP(x,__SC_ARGS,__VA_ARGS__)); \
return ret; \
} \
- SYSCALL_ALIAS(sys##name, SyS##name); \
static inline long SYSC##name(__MAP(x,__SC_DECL,__VA_ARGS__))
asmlinkage long sys_time(time_t __user *tloc);
_
Patches currently in -mm which might be from ak@xxxxxxxxxxxxxxx are
origin.patch
syscallsh-use-gcc-alias-instead-of-assembler-aliases-for-syscalls.patch
scripts-mod-modpostc-handle-non-abs-crc-symbols.patch
linux-next.patch
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