[PATCH 5.19 129/158] riscv: signal: fix missing prototype warning

[Greg Kroah-Hartman]

From: Conor Dooley <conor.dooley@xxxxxxxxxxxxx>

commit b5c3aca86d2698c4850b6ee8b341938025d2780c upstream.

Fix the warning:
arch/riscv/kernel/signal.c:316:27: warning: no previous prototype for function 'do_notify_resume' [-Wmissing-prototypes]
asmlinkage __visible void do_notify_resume(struct pt_regs *regs,

All other functions in the file are static & none of the existing
headers stood out as an obvious location. Create signal.h to hold the
declaration.

Fixes: e2c0cdfba7f6 ("RISC-V: User-facing API")
Signed-off-by: Conor Dooley <conor.dooley@xxxxxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Link: https://lore.kernel.org/r/20220814141237.493457-4-mail@xxxxxxxxxxx
Signed-off-by: Palmer Dabbelt <palmer@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 arch/riscv/include/asm/signal.h |   12 ++++++++++++
 arch/riscv/kernel/signal.c      |    1 +
 2 files changed, 13 insertions(+)
 create mode 100644 arch/riscv/include/asm/signal.h

--- /dev/null
+++ b/arch/riscv/include/asm/signal.h
@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef __ASM_SIGNAL_H
+#define __ASM_SIGNAL_H
+
+#include <uapi/asm/signal.h>
+#include <uapi/asm/ptrace.h>
+
+asmlinkage __visible
+void do_notify_resume(struct pt_regs *regs, unsigned long thread_info_flags);
+
+#endif
--- a/arch/riscv/kernel/signal.c
+++ b/arch/riscv/kernel/signal.c
@@ -15,6 +15,7 @@
 
 #include <asm/ucontext.h>
 #include <asm/vdso.h>
+#include <asm/signal.h>
 #include <asm/signal32.h>
 #include <asm/switch_to.h>
 #include <asm/csr.h>