From 7875bc9b07cde868784195e215f4deaa0fa928a2 Mon Sep 17 00:00:00 2001 From: Christophe Leroy Date: Mon, 20 Dec 2021 16:38:16 +0000 Subject: [PATCH] powerpc/ftrace: Don't save again LR in ftrace_regs_caller() on PPC32 PPC32 mcount() caller already saves LR on stack, no need to save it again. Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/eadcfc770b4f1e35535ffb85e28e858a2c31dec4.1640017960.git.christophe.leroy@csgroup.eu --- 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)