linux-kernel - [tip: objtool/core] objtool: Remove redundant checks on operand type

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Message-ID: <158759429242.28353.3657071883365034658.tip-bot2@tip-bot2>
Date:   Wed, 22 Apr 2020 22:24:52 -0000
From:   "tip-bot2 for Julien Thierry" <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: Remove redundant checks on operand type

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

Commit-ID:     a60e3f18ee0a280911b3aa4a5d756006cf766397
Gitweb:        https://git.kernel.org/tip/a60e3f18ee0a280911b3aa4a5d756006cf766397
Author:        Julien Thierry <jthierry@...hat.com>
AuthorDate:    Fri, 27 Mar 2020 15:28:39 
Committer:     Josh Poimboeuf <jpoimboe@...hat.com>
CommitterDate: Tue, 14 Apr 2020 10:39:24 -05:00

objtool: Remove redundant checks on operand type

POP operations are already in the code path where the destination
operand is OP_DEST_REG. There is no need to check the operand type
again.

Signed-off-by: Julien Thierry <jthierry@...hat.com>
Acked-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Reviewed-by: Miroslav Benes <mbenes@...e.cz>
Signed-off-by: Josh Poimboeuf <jpoimboe@...hat.com>
---
 tools/objtool/check.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/tools/objtool/check.c b/tools/objtool/check.c
index 93fa7be..ed01059 100644
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -1733,15 +1733,13 @@ static int update_insn_state(struct instruction *insn, struct insn_state *state)
 
 		case OP_SRC_POP:
 		case OP_SRC_POPF:
-			if (!state->drap && op->dest.type == OP_DEST_REG &&
-			    op->dest.reg == cfa->base) {
+			if (!state->drap && op->dest.reg == cfa->base) {
 
 				/* pop %rbp */
 				cfa->base = CFI_SP;
 			}
 
 			if (state->drap && cfa->base == CFI_BP_INDIRECT &&
-			    op->dest.type == OP_DEST_REG &&
 			    op->dest.reg == state->drap_reg &&
 			    state->drap_offset == -state->stack_size) {