cregit-Linux how code gets into the kernel

Release 4.15 include/linux/linkage.h

Directory: include/linux
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_LINKAGE_H

#define _LINUX_LINKAGE_H

#include <linux/compiler_types.h>
#include <linux/stringify.h>
#include <linux/export.h>
#include <asm/linkage.h>

/* Some toolchains use other characters (e.g. '`') to mark new line in macro */
#ifndef ASM_NL

#define ASM_NL		 ;
#endif

#ifdef __cplusplus

#define CPP_ASMLINKAGE extern "C"
#else

#define CPP_ASMLINKAGE
#endif

#ifndef asmlinkage

#define asmlinkage CPP_ASMLINKAGE
#endif

#ifndef cond_syscall

#define cond_syscall(x)	asm(                            \
        ".weak " VMLINUX_SYMBOL_STR(x) "\n\t"           \
        ".set  " VMLINUX_SYMBOL_STR(x) ","              \
                 VMLINUX_SYMBOL_STR(sys_ni_syscall))
#endif

#ifndef SYSCALL_ALIAS

#define SYSCALL_ALIAS(alias, name) asm(                    \
        ".globl " VMLINUX_SYMBOL_STR(alias) "\n\t"      \
        ".set   " VMLINUX_SYMBOL_STR(alias) ","         \
                  VMLINUX_SYMBOL_STR(name))
#endif


#define __page_aligned_data	__section(.data..page_aligned) __aligned(PAGE_SIZE)

#define __page_aligned_bss	__section(.bss..page_aligned) __aligned(PAGE_SIZE)

/*
 * For assembly routines.
 *
 * Note when using these that you must specify the appropriate
 * alignment directives yourself
 */

#define __PAGE_ALIGNED_DATA	.section ".data..page_aligned", "aw"

#define __PAGE_ALIGNED_BSS	.section ".bss..page_aligned", "aw"

/*
 * 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__

#ifndef LINKER_SCRIPT

#define ALIGN __ALIGN

#define ALIGN_STR __ALIGN_STR

#ifndef ENTRY

#define ENTRY(name) \
	.globl name ASM_NL \
        ALIGN ASM_NL \
        name:
#endif
#endif /* LINKER_SCRIPT */

#ifndef WEAK

#define WEAK(name)	   \
	.weak name ASM_NL   \
        name:
#endif

#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 ASM_NL \
        END(name)
#endif

#endif

#endif

Overall Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)5828.16%622.22%
Jan Beulich3014.56%13.70%
Al Viro2713.11%13.70%
Tim Abbott178.25%414.81%
Chen Gang S136.31%13.70%
Ingo Molnar125.83%27.41%
Rusty Russell125.83%13.70%
Linus Torvalds94.37%311.11%
Jeremy Fitzhardinge83.88%13.70%
Roland McGrath73.40%13.70%
Heiko Carstens62.91%13.70%
Jeff Dike31.46%13.70%
Will Deacon10.49%13.70%
Greg Kroah-Hartman10.49%13.70%
John Reiser10.49%13.70%
Andi Kleen10.49%13.70%
Total206100.00%27100.00%
Directory: include/linux
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