linux-kernel - [tip: objtool/core] objtool: Make handle_insn

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Date:   Fri, 01 May 2020 18:22:21 -0000
From:   "tip-bot2 for Peter Zijlstra" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Julien Thierry <jthierry@...hat.com>,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>,
        Miroslav Benes <mbenes@...e.cz>,
        Josh Poimboeuf <jpoimboe@...hat.com>, x86 <x86@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: [tip: objtool/core] objtool: Make handle_insn_ops() unconditional

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

Commit-ID:     60041bcd8f5ab560dabf44dc384f58bbeb5a6a30
Gitweb:        https://git.kernel.org/tip/60041bcd8f5ab560dabf44dc384f58bbeb5a6a30
Author:        Peter Zijlstra <peterz@...radead.org>
AuthorDate:    Fri, 24 Apr 2020 16:16:41 +02:00
Committer:     Peter Zijlstra <peterz@...radead.org>
CommitterDate: Thu, 30 Apr 2020 20:14:32 +02:00

objtool: Make handle_insn_ops() unconditional

Now that every instruction has a list of stack_ops; we can trivially
distinquish those instructions that do not have stack_ops, their list
is empty.

This means we can now call handle_insn_ops() unconditionally.

Suggested-by: Julien Thierry <jthierry@...hat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Reviewed-by: Miroslav Benes <mbenes@...e.cz>
Acked-by: Josh Poimboeuf <jpoimboe@...hat.com>
Link: https://lkml.kernel.org/r/20200428191659.795115188@infradead.org
---
 tools/objtool/check.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/tools/objtool/check.c b/tools/objtool/check.c
index 068897d..6591c2d 100644
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -2259,6 +2259,9 @@ static int validate_branch(struct objtool_file *file, struct symbol *func,
 				return 0;
 		}
 
+		if (handle_insn_ops(insn, &state))
+			return 1;
+
 		switch (insn->type) {
 
 		case INSN_RETURN:
@@ -2318,9 +2321,6 @@ static int validate_branch(struct objtool_file *file, struct symbol *func,
 			break;
 
 		case INSN_EXCEPTION_RETURN:
-			if (handle_insn_ops(insn, &state))
-				return 1;
-
 			/*
 			 * This handles x86's sync_core() case, where we use an
 			 * IRET to self. All 'normal' IRET instructions are in
@@ -2340,8 +2340,6 @@ static int validate_branch(struct objtool_file *file, struct symbol *func,
 			return 0;
 
 		case INSN_STACK:
-			if (handle_insn_ops(insn, &state))
-				return 1;
 			break;
 
 		case INSN_STAC: