return_to_handler() was copied from PPC64. For PPC32 it just needs to save r3 and r4, and doesn't require any nop after the bl. Signed-off-by: Christophe Leroy <christophe.leroy@xxxxxxxxxx> --- arch/powerpc/kernel/trace/ftrace_32.S | 16 ++++++---------- 1 file changed, 6 insertions(+), 10 deletions(-) diff --git a/arch/powerpc/kernel/trace/ftrace_32.S b/arch/powerpc/kernel/trace/ftrace_32.S index 7e2fd729116b..95ffea2bdc29 100644 --- a/arch/powerpc/kernel/trace/ftrace_32.S +++ b/arch/powerpc/kernel/trace/ftrace_32.S @@ -162,22 +162,18 @@ _GLOBAL(ftrace_graph_caller) _GLOBAL(return_to_handler) /* need to save return values */ - stwu r1, -32(r1) - stw r3, 20(r1) - stw r4, 16(r1) - stw r31, 12(r1) - mr r31, r1 + stwu r1, -16(r1) + stw r3, 8(r1) + stw r4, 12(r1) bl ftrace_return_to_handler - nop /* return value has real return address */ mtlr r3 - lwz r3, 20(r1) - lwz r4, 16(r1) - lwz r31,12(r1) - lwz r1, 0(r1) + lwz r3, 8(r1) + lwz r4, 12(r1) + addi r1, r1, 16 /* Jump back to real return address */ blr -- 2.33.1
