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Subject[PATCH 12.5/13] objtool: Reflow handle_jump_alt()

Subject: objtool: Reflow handle_jump_alt()
From: Peter Zijlstra <peterz@infradead.org>
Date: Thu May 13 13:52:46 CEST 2021

Miroslav figured the code flow in handle_jump_alt() was sub-optimal
with that goto. Reflow the code to make it clearer.

Reported-by: Miroslav Benes <mbenes@suse.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
tools/objtool/check.c | 22 +++++++++++-----------
1 file changed, 11 insertions(+), 11 deletions(-)

--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -1225,17 +1225,9 @@ static int handle_jump_alt(struct objtoo
struct instruction *orig_insn,
struct instruction **new_insn)
{
- if (orig_insn->type == INSN_NOP) {
-do_nop:
- if (orig_insn->len == 2)
- file->jl_nop_short++;
- else
- file->jl_nop_long++;
+ if (orig_insn->type != INSN_JUMP_UNCONDITIONAL &&
+ orig_insn->type != INSN_NOP) {

- return 0;
- }
-
- if (orig_insn->type != INSN_JUMP_UNCONDITIONAL) {
WARN_FUNC("unsupported instruction at jump label",
orig_insn->sec, orig_insn->offset);
return -1;
@@ -1252,7 +1244,15 @@ static int handle_jump_alt(struct objtoo
orig_insn->offset, orig_insn->len,
arch_nop_insn(orig_insn->len));
orig_insn->type = INSN_NOP;
- goto do_nop;
+ }
+
+ if (orig_insn->type == INSN_NOP) {
+ if (orig_insn->len == 2)
+ file->jl_nop_short++;
+ else
+ file->jl_nop_long++;
+
+ return 0;
}

if (orig_insn->len == 2)
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