linux-kernel - [tip: objtool/urgent] objtool: Remove --no-unreachable for noinstr-only vmlinux.o runs

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Message-ID: <174289170029.14745.2406901709755619321.tip-bot2@tip-bot2>
Date: Tue, 25 Mar 2025 08:35:00 -0000
From: "tip-bot2 for Josh Poimboeuf" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: Josh Poimboeuf <jpoimboe@...nel.org>, Ingo Molnar <mingo@...nel.org>,
 Linus Torvalds <torvalds@...ux-foundation.org>, x86@...nel.org,
 linux-kernel@...r.kernel.org
Subject: [tip: objtool/urgent] objtool: Remove --no-unreachable for
 noinstr-only vmlinux.o runs

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

Commit-ID:     876a4bce3849b235d752d13ec3180e15a35e52de
Gitweb:        https://git.kernel.org/tip/876a4bce3849b235d752d13ec3180e15a35e52de
Author:        Josh Poimboeuf <jpoimboe@...nel.org>
AuthorDate:    Mon, 24 Mar 2025 14:56:02 -07:00
Committer:     Ingo Molnar <mingo@...nel.org>
CommitterDate: Tue, 25 Mar 2025 09:20:27 +01:00

objtool: Remove --no-unreachable for noinstr-only vmlinux.o runs

For (!X86_KERNEL_IBT && !LTO_CLANG && NOINSTR_VALIDATION), objtool runs
on both translation units and vmlinux.o.  The vmlinux.o run only does
noinstr/noret validation.  In that case --no-unreachable has no effect.
Remove it.

Note that for ((X86_KERNEL_IBT || LTO_CLANG) && KCOV), --no-unreachable
still gets set in objtool-args-y by scripts/Makefile.lib.

Signed-off-by: Josh Poimboeuf <jpoimboe@...nel.org>
Signed-off-by: Ingo Molnar <mingo@...nel.org>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Link: https://lore.kernel.org/r/05414246a0124db2f21b0d071b652aa9043d039d.1742852847.git.jpoimboe@kernel.org
---
 scripts/Makefile.vmlinux_o | 1 -
 1 file changed, 1 deletion(-)

diff --git a/scripts/Makefile.vmlinux_o b/scripts/Makefile.vmlinux_o
index f476f56..938c745 100644
--- a/scripts/Makefile.vmlinux_o
+++ b/scripts/Makefile.vmlinux_o
@@ -44,7 +44,6 @@ else
 vmlinux-objtool-args-$(CONFIG_OBJTOOL_WERROR)		+= --Werror
 endif
 
-vmlinux-objtool-args-$(CONFIG_GCOV_KERNEL)		+= --no-unreachable
 vmlinux-objtool-args-$(CONFIG_NOINSTR_VALIDATION)	+= --noinstr \
 							   $(if $(or $(CONFIG_MITIGATION_UNRET_ENTRY),$(CONFIG_MITIGATION_SRSO)), --unret)