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um: Fix -Wmissing-prototypes warnings for (rt_)sigreturn

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Use SYSCALL_DEFINE0 to define (rt_)sigreturn. This will address
below -Wmissing-prototypes warnings:

arch/x86/um/signal.c:453:6: warning: no previous prototype for ‘sys_sigreturn’ [-Wmissing-prototypes]
arch/x86/um/signal.c:560:6: warning: no previous prototype for ‘sys_rt_sigreturn’ [-Wmissing-prototypes]

Signed-off-by: Tiwei Bie <tiwei.btw@antgroup.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
This commit is contained in:
Tiwei Bie 2024-04-23 20:58:52 +08:00 committed by Richard Weinberger
parent f95bab8610
commit 323ced9669
1 changed files with 3 additions and 2 deletions
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5
arch/x86/um/signal.c
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@ -8,6 +8,7 @@
#include <linux/personality.h>
#include <linux/ptrace.h>
#include <linux/kernel.h>
#include <linux/syscalls.h>
#include <asm/unistd.h>
#include <linux/uaccess.h>
#include <asm/ucontext.h>
@ -449,7 +450,7 @@ int setup_signal_stack_si(unsigned long stack_top, struct ksignal *ksig,
return 0;
}
long sys_sigreturn(void)
SYSCALL_DEFINE0(sigreturn)
{
unsigned long sp = PT_REGS_SP(&current->thread.regs);
struct sigframe __user *frame = (struct sigframe __user *)(sp - 8);
@ -556,7 +557,7 @@ int setup_signal_stack_si(unsigned long stack_top, struct ksignal *ksig,
}
#endif
long sys_rt_sigreturn(void)
SYSCALL_DEFINE0(rt_sigreturn)
{
unsigned long sp = PT_REGS_SP(&current->thread.regs);
struct rt_sigframe __user *frame =