b0fac02370
git commit 54a0151041 ("asmlinkage_protect
replaces prevent_tail_call") causes this build failure on s390:
AS arch/s390/kernel/entry64.o
In file included from arch/s390/kernel/entry64.S:14:
include/linux/linkage.h:34: error: syntax error in macro parameter list
make[1]: *** [arch/s390/kernel/entry64.o] Error 1
make: *** [arch/s390/kernel] Error 2
and some other architectures. The reason is that some architectures add
the "-traditional" flag to the invocation of $(AS), which disables
variadic macro argument support.
So just surround the new define with an #ifndef __ASSEMBLY__ to prevent
any side effects on asm code.
Cc: Roland McGrath <roland@redhat.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
92 lines
1.8 KiB
C
92 lines
1.8 KiB
C
#ifndef _LINUX_LINKAGE_H
|
|
#define _LINUX_LINKAGE_H
|
|
|
|
#include <asm/linkage.h>
|
|
|
|
#ifdef __cplusplus
|
|
#define CPP_ASMLINKAGE extern "C"
|
|
#else
|
|
#define CPP_ASMLINKAGE
|
|
#endif
|
|
|
|
#ifndef asmlinkage
|
|
#define asmlinkage CPP_ASMLINKAGE
|
|
#endif
|
|
|
|
#ifndef asmregparm
|
|
# define asmregparm
|
|
#endif
|
|
|
|
/*
|
|
* This is used by architectures to keep arguments on the stack
|
|
* untouched by the compiler by keeping them live until the end.
|
|
* The argument stack may be owned by the assembly-language
|
|
* caller, not the callee, and gcc doesn't always understand
|
|
* that.
|
|
*
|
|
* We have the return value, and a maximum of six arguments.
|
|
*
|
|
* This should always be followed by a "return ret" for the
|
|
* protection to work (ie no more work that the compiler might
|
|
* end up needing stack temporaries for).
|
|
*/
|
|
/* Assembly files may be compiled with -traditional .. */
|
|
#ifndef __ASSEMBLY__
|
|
#ifndef asmlinkage_protect
|
|
# define asmlinkage_protect(n, ret, args...) do { } while (0)
|
|
#endif
|
|
#endif
|
|
|
|
#ifndef __ALIGN
|
|
#define __ALIGN .align 4,0x90
|
|
#define __ALIGN_STR ".align 4,0x90"
|
|
#endif
|
|
|
|
#ifdef __ASSEMBLY__
|
|
|
|
#define ALIGN __ALIGN
|
|
#define ALIGN_STR __ALIGN_STR
|
|
|
|
#ifndef ENTRY
|
|
#define ENTRY(name) \
|
|
.globl name; \
|
|
ALIGN; \
|
|
name:
|
|
#endif
|
|
|
|
#ifndef WEAK
|
|
#define WEAK(name) \
|
|
.weak name; \
|
|
name:
|
|
#endif
|
|
|
|
#define KPROBE_ENTRY(name) \
|
|
.pushsection .kprobes.text, "ax"; \
|
|
ENTRY(name)
|
|
|
|
#define KPROBE_END(name) \
|
|
END(name); \
|
|
.popsection
|
|
|
|
#ifndef END
|
|
#define END(name) \
|
|
.size name, .-name
|
|
#endif
|
|
|
|
/* If symbol 'name' is treated as a subroutine (gets called, and returns)
|
|
* then please use ENDPROC to mark 'name' as STT_FUNC for the benefit of
|
|
* static analysis tools such as stack depth analyzer.
|
|
*/
|
|
#ifndef ENDPROC
|
|
#define ENDPROC(name) \
|
|
.type name, @function; \
|
|
END(name)
|
|
#endif
|
|
|
|
#endif
|
|
|
|
#define NORET_TYPE /**/
|
|
#define ATTRIB_NORET __attribute__((noreturn))
|
|
#define NORET_AND noreturn,
|
|
|
|
#endif
|