[tip: x86/entry] x86/entry/64: Use syscall wrappers for x32_rt_sigreturn

[tip-bot2 for Brian Gerst]

The following commit has been merged into the x86/entry branch of tip:

Commit-ID:     27dd84fafcd5e3c565164bb303fe8ec8ef59e147
Gitweb:        https://git.kernel.org/tip/27dd84fafcd5e3c565164bb303fe8ec8ef59e147
Author:        Brian Gerst <brgerst@xxxxxxxxx>
AuthorDate:    Fri, 13 Mar 2020 15:51:31 -04:00
Committer:     Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitterDate: Sat, 21 Mar 2020 16:03:20 +01:00

x86/entry/64: Use syscall wrappers for x32_rt_sigreturn

Add missing syscall wrapper for x32_rt_sigreturn().

Signed-off-by: Brian Gerst <brgerst@xxxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Reviewed-by: Dominik Brodowski <linux@xxxxxxxxxxxxxxxxxxxx>
Reviewed-by: Andy Lutomirski <luto@xxxxxxxxxx>
Link: https://lkml.kernel.org/r/20200313195144.164260-6-brgerst@xxxxxxxxx

---
 arch/x86/entry/syscalls/syscall_64.tbl | 2 +-
 arch/x86/include/asm/sighandling.h     | 5 -----
 arch/x86/kernel/signal.c               | 2 +-
 3 files changed, 2 insertions(+), 7 deletions(-)

diff --git a/arch/x86/entry/syscalls/syscall_64.tbl b/arch/x86/entry/syscalls/syscall_64.tbl
index 44d510b..0b5a25b 100644
--- a/arch/x86/entry/syscalls/syscall_64.tbl
+++ b/arch/x86/entry/syscalls/syscall_64.tbl
@@ -367,7 +367,7 @@
 # is defined.
 #
 512	x32	rt_sigaction		__x32_compat_sys_rt_sigaction
-513	x32	rt_sigreturn		sys32_x32_rt_sigreturn
+513	x32	rt_sigreturn		__x32_compat_sys_x32_rt_sigreturn
 514	x32	ioctl			__x32_compat_sys_ioctl
 515	x32	readv			__x32_compat_sys_readv
 516	x32	writev			__x32_compat_sys_writev
diff --git a/arch/x86/include/asm/sighandling.h b/arch/x86/include/asm/sighandling.h
index 2fcbd6f..bd26834 100644
--- a/arch/x86/include/asm/sighandling.h
+++ b/arch/x86/include/asm/sighandling.h
@@ -17,9 +17,4 @@ void signal_fault(struct pt_regs *regs, void __user *frame, char *where);
 int setup_sigcontext(struct sigcontext __user *sc, void __user *fpstate,
 		     struct pt_regs *regs, unsigned long mask);
 
-
-#ifdef CONFIG_X86_X32_ABI
-asmlinkage long sys32_x32_rt_sigreturn(void);
-#endif
-
 #endif /* _ASM_X86_SIGHANDLING_H */
diff --git a/arch/x86/kernel/signal.c b/arch/x86/kernel/signal.c
index 8a29573..8609049 100644
--- a/arch/x86/kernel/signal.c
+++ b/arch/x86/kernel/signal.c
@@ -859,7 +859,7 @@ void signal_fault(struct pt_regs *regs, void __user *frame, char *where)
 }
 
 #ifdef CONFIG_X86_X32_ABI
-asmlinkage long sys32_x32_rt_sigreturn(void)
+COMPAT_SYSCALL_DEFINE0(x32_rt_sigreturn)
 {
 	struct pt_regs *regs = current_pt_regs();
 	struct rt_sigframe_x32 __user *frame;