Commit 57a4f91a authored by Andi Kleen's avatar Andi Kleen Committed by Andi Kleen
Browse files

[PATCH] x86-64: Auto compute __NR_syscall_max at compile time 



No need to maintain it anymore

Signed-off-by: default avatarAndi Kleen <ak@suse.de>
parent 2f3c30e6

arch/x86_64/kernel/asm-offsets.c

+10 −0
Original line number Diff line number Diff line
@@ -21,6 +21,14 @@ 


#define BLANK() asm volatile("\n->" : : )



#define __NO_STUBS 1

#undef __SYSCALL

#undef _ASM_X86_64_UNISTD_H_

#define __SYSCALL(nr, sym) [nr] = 1,

static char syscalls[] = {

#include <asm/unistd.h>

};



int main(void)

{

#define ENTRY(entry) DEFINE(tsk_ ## entry, offsetof(struct task_struct, entry))
@@ -71,5 +79,7 @@ int main(void) 
	DEFINE(TSS_ist, offsetof(struct tss_struct, ist));

	BLANK();

	DEFINE(crypto_tfm_ctx_offset, offsetof(struct crypto_tfm, __crt_ctx));

	BLANK();

	DEFINE(__NR_syscall_max, sizeof(syscalls) - 1);

	return 0;

}

arch/x86_64/kernel/syscall.c

+1 −0
Original line number Diff line number Diff line
@@ -3,6 +3,7 @@ 
#include <linux/linkage.h>

#include <linux/sys.h>

#include <linux/cache.h>

#include <asm/asm-offsets.h>



#define __NO_STUBS

include/asm-x86_64/unistd.h

+0 −2
Original line number Diff line number Diff line
@@ -620,8 +620,6 @@ __SYSCALL(__NR_vmsplice, sys_vmsplice) 
#define __NR_move_pages		279

__SYSCALL(__NR_move_pages, sys_move_pages)



#define __NR_syscall_max __NR_move_pages



#ifndef __NO_STUBS

#define __ARCH_WANT_OLD_READDIR

#define __ARCH_WANT_OLD_STAT