Commit 6c597963 authored by Heiko Carstens's avatar Heiko Carstens Committed by Linus Torvalds
Browse files

syscall define: fix uml compile bug 



With the new system call defines we get this on uml:

arch/um/sys-i386/built-in.o: In function `sys_call_table':
(.rodata+0x308): undefined reference to `sys_sigprocmask'

Reason for this is that uml passes the preprocessor option
-Dsigprocmask=kernel_sigprocmask to gcc when compiling the kernel.
This causes SYSCALL_DEFINE3(sigprocmask, ...) to be expanded to
SYSCALL_DEFINEx(3, kernel_sigprocmask, ...) and finally to a system
call named sys_kernel_sigprocmask.  However sys_sigprocmask is missing
because of this.

To avoid macro expansion for the system call name just concatenate the
name at first define instead of carrying it through severel levels.
This was pointed out by Al Viro.

Signed-off-by: default avatarHeiko Carstens <heiko.carstens@de.ibm.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Reviewed-by: default avatarWANG Cong <wangcong@zeuux.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 0e4a9b59

include/linux/syscalls.h

+14 −14
Original line number Diff line number Diff line
@@ -96,12 +96,12 @@ struct old_linux_dirent; 
#define __SC_TEST6(t6, a6, ...)	__SC_TEST(t6); __SC_TEST5(__VA_ARGS__)



#define SYSCALL_DEFINE0(name)	   asmlinkage long sys_##name(void)

#define SYSCALL_DEFINE1(...)    SYSCALL_DEFINEx(1, __VA_ARGS__)

#define SYSCALL_DEFINE2(...)    SYSCALL_DEFINEx(2, __VA_ARGS__)

#define SYSCALL_DEFINE3(...)    SYSCALL_DEFINEx(3, __VA_ARGS__)

#define SYSCALL_DEFINE4(...)    SYSCALL_DEFINEx(4, __VA_ARGS__)

#define SYSCALL_DEFINE5(...)    SYSCALL_DEFINEx(5, __VA_ARGS__)

#define SYSCALL_DEFINE6(...)    SYSCALL_DEFINEx(6, __VA_ARGS__)

#define SYSCALL_DEFINE1(name, ...) SYSCALL_DEFINEx(1, _##name, __VA_ARGS__)

#define SYSCALL_DEFINE2(name, ...) SYSCALL_DEFINEx(2, _##name, __VA_ARGS__)

#define SYSCALL_DEFINE3(name, ...) SYSCALL_DEFINEx(3, _##name, __VA_ARGS__)

#define SYSCALL_DEFINE4(name, ...) SYSCALL_DEFINEx(4, _##name, __VA_ARGS__)

#define SYSCALL_DEFINE5(name, ...) SYSCALL_DEFINEx(5, _##name, __VA_ARGS__)

#define SYSCALL_DEFINE6(name, ...) SYSCALL_DEFINEx(6, _##name, __VA_ARGS__)



#ifdef CONFIG_PPC64

#define SYSCALL_ALIAS(alias, name)					\
@@ -121,21 +121,21 @@ struct old_linux_dirent; 


#define SYSCALL_DEFINE(name) static inline long SYSC_##name

#define SYSCALL_DEFINEx(x, name, ...)					\

	asmlinkage long sys_##name(__SC_DECL##x(__VA_ARGS__));		\

	static inline long SYSC_##name(__SC_DECL##x(__VA_ARGS__));	\

	asmlinkage long SyS_##name(__SC_LONG##x(__VA_ARGS__))		\

	asmlinkage long sys##name(__SC_DECL##x(__VA_ARGS__));		\

	static inline long SYSC##name(__SC_DECL##x(__VA_ARGS__));	\

	asmlinkage long SyS##name(__SC_LONG##x(__VA_ARGS__))		\

	{								\

		__SC_TEST##x(__VA_ARGS__);				\

		return (long) SYSC_##name(__SC_CAST##x(__VA_ARGS__));	\

		return (long) SYSC##name(__SC_CAST##x(__VA_ARGS__));	\

	}								\

	SYSCALL_ALIAS(sys_##name, SyS_##name);				\

	static inline long SYSC_##name(__SC_DECL##x(__VA_ARGS__))

	SYSCALL_ALIAS(sys##name, SyS##name);				\

	static inline long SYSC##name(__SC_DECL##x(__VA_ARGS__))



#else /* CONFIG_HAVE_SYSCALL_WRAPPERS */



#define SYSCALL_DEFINE(name) asmlinkage long sys_##name

#define SYSCALL_DEFINEx(x, name, ...)					\

	asmlinkage long sys_##name(__SC_DECL##x(__VA_ARGS__))

	asmlinkage long sys##name(__SC_DECL##x(__VA_ARGS__))



#endif /* CONFIG_HAVE_SYSCALL_WRAPPERS */

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