linux-kernel - [tip: objtool/urgent] objtool: Silence more KCOV warnings, part 2

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Message-ID: <174349172182.14745.15104179899500326383.tip-bot2@tip-bot2>
Date: Tue, 01 Apr 2025 07:15:21 -0000
From: "tip-bot2 for Josh Poimboeuf" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: kernel test robot <lkp@...el.com>, 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: Silence more KCOV warnings, part 2

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

Commit-ID:     55c78035a1a8dfb05f1472018ce2a651701adb7d
Gitweb:        https://git.kernel.org/tip/55c78035a1a8dfb05f1472018ce2a651701adb7d
Author:        Josh Poimboeuf <jpoimboe@...nel.org>
AuthorDate:    Mon, 31 Mar 2025 21:26:36 -07:00
Committer:     Ingo Molnar <mingo@...nel.org>
CommitterDate: Tue, 01 Apr 2025 09:07:12 +02:00

objtool: Silence more KCOV warnings, part 2

Similar to GCOV, KCOV can leave behind dead code and undefined behavior.
Warnings related to those should be ignored.

The previous commit:

  6b023c784204 ("objtool: Silence more KCOV warnings")

... only did so for CONFIG_CGOV_KERNEL.  Also do it for CONFIG_KCOV, but
for real this time.

Fixes the following warning:

  vmlinux.o: warning: objtool: synaptics_report_mt_data: unexpected end of section .text.synaptics_report_mt_data

Fixes: 6b023c784204 ("objtool: Silence more KCOV warnings")
Reported-by: kernel test robot <lkp@...el.com>
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/a44ba16e194bcbc52c1cef3d3cd9051a62622723.1743481539.git.jpoimboe@kernel.org
Closes: https://lore.kernel.org/oe-kbuild-all/202503282236.UhfRsF3B-lkp@intel.com/
---
 scripts/Makefile.lib | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index b935974..4d54305 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -275,7 +275,7 @@ objtool-args-$(CONFIG_MITIGATION_SLS)			+= --sls
 objtool-args-$(CONFIG_STACK_VALIDATION)			+= --stackval
 objtool-args-$(CONFIG_HAVE_STATIC_CALL_INLINE)		+= --static-call
 objtool-args-$(CONFIG_HAVE_UACCESS_VALIDATION)		+= --uaccess
-objtool-args-$(CONFIG_GCOV_KERNEL)			+= --no-unreachable
+objtool-args-$(or $(CONFIG_GCOV_KERNEL),$(CONFIG_KCOV))	+= --no-unreachable
 objtool-args-$(CONFIG_PREFIX_SYMBOLS)			+= --prefix=$(CONFIG_FUNCTION_PADDING_BYTES)
 objtool-args-$(CONFIG_OBJTOOL_WERROR)			+= --Werror