linux-kernel - [tip: objtool/core] objtool: Remove superfluous dead_end

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Date:   Fri, 14 Apr 2023 14:47:55 -0000
From:   "tip-bot2 for Josh Poimboeuf" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Josh Poimboeuf <jpoimboe@...nel.org>,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: objtool/core] objtool: Remove superfluous dead_end_function() check

The following commit has been merged into the objtool/core branch of tip:

Commit-ID:     6126ed5dfbc656374e851bfdfb128f3aa9e1263a
Gitweb:        https://git.kernel.org/tip/6126ed5dfbc656374e851bfdfb128f3aa9e1263a
Author:        Josh Poimboeuf <jpoimboe@...nel.org>
AuthorDate:    Wed, 12 Apr 2023 12:03:22 -07:00
Committer:     Peter Zijlstra <peterz@...radead.org>
CommitterDate: Fri, 14 Apr 2023 16:08:29 +02:00

objtool: Remove superfluous dead_end_function() check

annotate_call_site() already sets 'insn->dead_end' for calls to dead end
functions.

Signed-off-by: Josh Poimboeuf <jpoimboe@...nel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Link: https://lkml.kernel.org/r/5d603a301e9a8b1036b61503385907e154867ace.1681325924.git.jpoimboe@kernel.org
---
 tools/objtool/check.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/tools/objtool/check.c b/tools/objtool/check.c
index 9de3972..1cf2e28 100644
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -4078,8 +4078,7 @@ static bool ignore_unreachable_insn(struct objtool_file *file, struct instructio
 	 * It may also insert a UD2 after calling a __noreturn function.
 	 */
 	prev_insn = prev_insn_same_sec(file, insn);
-	if ((prev_insn->dead_end ||
-	     dead_end_function(file, insn_call_dest(prev_insn))) &&
+	if (prev_insn->dead_end &&
 	    (insn->type == INSN_BUG ||
 	     (insn->type == INSN_JUMP_UNCONDITIONAL &&
 	      insn->jump_dest && insn->jump_dest->type == INSN_BUG)))