x86: fix sys_sigreturn() return type to be long, not unsigned long

Same as with other system calls, sys_sigreturn() should return a value of type long, not unsigned long. This also matches the behaviour for IA32_EMULATION, see sys32_sigreturn() in arch/x86/ia32/ia32_signal.c . Cc: Andi Kleen <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Jiri Slaby <[email protected]> Cc: [email protected] Cc: Michael Tautschnig <[email protected]> Reviewed-by: Thomas Gleixner <[email protected]> Signed-off-by: Dominik Brodowski <[email protected]>
josf · Apr 2, 2018 · 025bd39 · 025bd39
1 parent 66f4e88
commit 025bd39
Showing 2 changed files with 2 additions and 2 deletions.
diff --git a/arch/x86/include/asm/syscalls.h b/arch/x86/include/asm/syscalls.h
@@ -35,7 +35,7 @@ asmlinkage long sys_get_thread_area(struct user_desc __user *);
 #ifdef CONFIG_X86_32
 
 /* kernel/signal.c */
-asmlinkage unsigned long sys_sigreturn(void);
+asmlinkage long sys_sigreturn(void);
 
 /* kernel/vm86_32.c */
 struct vm86_struct;

diff --git a/arch/x86/kernel/signal.c b/arch/x86/kernel/signal.c
@@ -601,7 +601,7 @@ static int x32_setup_rt_frame(struct ksignal *ksig,
  * Do a signal return; undo the signal stack.
  */
 #ifdef CONFIG_X86_32
-asmlinkage unsigned long sys_sigreturn(void)
+asmlinkage long sys_sigreturn(void)
 {
 	struct pt_regs *regs = current_pt_regs();
 	struct sigframe __user *frame;