From: Thorsten Blum <blum@kernel.org>
To: Thomas Gleixner <tglx@kernel.org>, Ingo Molnar <mingo@redhat.com>,
Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
Nicolas Schier <n.schier@fritz.com>,
Ard Biesheuvel <ardb@kernel.org>,
"Lorenzo Stoakes (ARM)" <ljs@kernel.org>,
Jan Stancek <jstancek@redhat.com>,
"Mike Rapoport (Microsoft)" <rppt@kernel.org>,
"Pratyush Yadav (Google)" <pratyush@kernel.org>,
Tom Lendacky <thomas.lendacky@amd.com>,
Ryan Roberts <ryan.roberts@arm.com>,
Andreas Larsson <andreas@gaisler.com>,
Andrew Morton <akpm@linux-foundation.org>,
Kevin Brodsky <kevin.brodsky@arm.com>,
Vitaly Kuznetsov <vkuznets@redhat.com>
Cc: linux-kernel@vger.kernel.org, Thorsten Blum <blum@kernel.org>,
Ingo Molnar <mingo@kernel.org>
Subject: [PATCH v4 4/4] x86/boot/compressed: Enable -Wunused
Date: Mon, 9 Nov 2026 13:48:21 +0100 [thread overview]
Message-ID: <20261109124816.61438-10-blum@kernel.org> (raw)
In-Reply-To: <20261109124816.61438-6-blum@kernel.org>
arch/x86/boot/compressed/Makefile resets KBUILD_CFLAGS for this
directory, but does not re-enable -Wunused. Therefore, unused variables
and static functions in arch/x86/boot/compressed/ currently do not emit
warnings.
Add -Wunused to warn about these, and -Wno-unused-but-set-variable as
well as -Wno-unused-const-variable to match the W=0 kernel defaults.
Reviewed-by: Jan Stancek <jstancek@redhat.com>
Reviewed-by: Nicolas Schier <n.schier@fritz.com>
Signed-off-by: Thorsten Blum <blum@kernel.org>
---
arch/x86/boot/compressed/Makefile | 3 +++
1 file changed, 3 insertions(+)
diff --git a/arch/x86/boot/compressed/Makefile b/arch/x86/boot/compressed/Makefile
index 680ad803cba7..3ff75bc2239b 100644
--- a/arch/x86/boot/compressed/Makefile
+++ b/arch/x86/boot/compressed/Makefile
@@ -29,6 +29,9 @@ KBUILD_CFLAGS += $(CC_FLAGS_DIALECT)
KBUILD_CFLAGS += -fno-strict-aliasing -fPIE
KBUILD_CFLAGS += -fno-jump-tables
KBUILD_CFLAGS += -Wundef
+KBUILD_CFLAGS += -Wunused
+KBUILD_CFLAGS += -Wno-unused-but-set-variable
+KBUILD_CFLAGS += -Wno-unused-const-variable
KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING
cflags-$(CONFIG_X86_32) := -march=i386
cflags-$(CONFIG_X86_64) := -mcmodel=small -mno-red-zone
prev parent reply other threads:[~2026-11-09 12:49 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-09 12:48 [PATCH v4 0/4] x86/boot/compressed: Enable -Wunused and remove unused variables Thorsten Blum
2026-11-09 12:48 ` [PATCH v4 1/4] x86/boot/compressed: Remove unused variables in EFI helpers Thorsten Blum
2026-11-09 12:48 ` [PATCH v4 2/4] x86/boot/compressed: Clean up EFI RSDP lookup in efi_get_rsdp_addr() Thorsten Blum
2026-11-09 12:48 ` [PATCH v4 3/4] x86/boot/compressed: Mark process_mem_region() index __maybe_unused Thorsten Blum
2026-11-09 12:48 ` Thorsten Blum [this message]
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