[PATCH v2 05/13] powerpc/ftrace: Don't save again LR in ftrace_regs_caller() on PPC32
From: Christophe Leroy <hidden>
Date: 2021-12-20 16:38:26
Also in:
linuxppc-dev, lkml
Subsystem:
function hooks (ftrace), linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Steven Rostedt, Masami Hiramatsu, Madhavan Srinivasan, Michael Ellerman, Linus Torvalds
PPC32 mcount() caller already saves LR on stack, no need to save it again. Signed-off-by: Christophe Leroy <redacted> --- arch/powerpc/kernel/trace/ftrace_32.S | 3 --- 1 file changed, 3 deletions(-)
diff --git a/arch/powerpc/kernel/trace/ftrace_32.S b/arch/powerpc/kernel/trace/ftrace_32.S
index 0a02c0cb12d9..7e2fd729116b 100644
--- a/arch/powerpc/kernel/trace/ftrace_32.S
+++ b/arch/powerpc/kernel/trace/ftrace_32.S@@ -53,9 +53,6 @@ _GLOBAL(ftrace_stub) blr _GLOBAL(ftrace_regs_caller) - /* Save the original return address in A's stack frame */ - stw r0,LRSAVE(r1) - /* Create our stack frame + pt_regs */ stwu r1,-INT_FRAME_SIZE(r1)
--
2.33.1