From: Arnd Bergmann <arnd@xxxxxxxx>
On 32-bit builds, the prepare_ftrace_return() function only has a global
definition, but no prototype before it, which causes a warning:
arch/x86/kernel/ftrace.c:625:6: warning: no previous prototype for ‘prepare_ftrace_return’ [-Wmissing-prototypes]
625 | void prepare_ftrace_return(unsigned long ip, unsigned long *parent,
Move the prototype that is already needed for some configurations into
a header file where it can be seen unconditionally.
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
---
arch/x86/include/asm/ftrace.h | 3 +++
arch/x86/kernel/ftrace.c | 3 ---
2 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/arch/x86/include/asm/ftrace.h b/arch/x86/include/asm/ftrace.h
index 5061ac98ffa1..b8d4a07f9595 100644
--- a/arch/x86/include/asm/ftrace.h
+++ b/arch/x86/include/asm/ftrace.h
@@ -106,6 +106,9 @@ struct dyn_arch_ftrace {
#ifndef __ASSEMBLY__
+void prepare_ftrace_return(unsigned long ip, unsigned long *parent,
+ unsigned long frame_pointer);
+
#if defined(CONFIG_FUNCTION_TRACER) && defined(CONFIG_DYNAMIC_FTRACE)
extern void set_ftrace_ops_ro(void);
#else
diff --git a/arch/x86/kernel/ftrace.c b/arch/x86/kernel/ftrace.c
index 5e7ead52cfdb..01e8f34daf22 100644
--- a/arch/x86/kernel/ftrace.c
+++ b/arch/x86/kernel/ftrace.c
@@ -525,9 +525,6 @@ static void *addr_from_call(void *ptr)
return ptr + CALL_INSN_SIZE + call.disp;
}
-void prepare_ftrace_return(unsigned long ip, unsigned long *parent,
- unsigned long frame_pointer);
-
/*
* If the ops->trampoline was not allocated, then it probably
* has a static trampoline func, or is the ftrace caller itself.
--
2.39.2
