From: Thorsten Blum <thorsten.blum@linux.dev>
To: Thomas Gleixner <tglx@kernel.org>, Ingo Molnar <mingo@redhat.com>,
Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
"H. Peter Anvin" <hpa@zytor.com>,
Ard Biesheuvel <ardb@kernel.org>,
Nathan Chancellor <nathan@kernel.org>,
Nicolas Schier <nsc@kernel.org>
Cc: x86@kernel.org, linux-kernel@vger.kernel.org,
Thorsten Blum <thorsten.blum@linux.dev>
Subject: [PATCH v2 4/4] x86/boot/compressed: Enable -Wunused
Date: Wed, 24 Jun 2026 14:02:58 +0200 [thread overview]
Message-ID: <20260624120300.590233-10-thorsten.blum@linux.dev> (raw)
In-Reply-To: <20260624120300.590233-6-thorsten.blum@linux.dev>
arch/x86/boot/compressed/Makefile resets the 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.
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
---
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 07e0e64b9a98..c1315a7b712c 100644
--- a/arch/x86/boot/compressed/Makefile
+++ b/arch/x86/boot/compressed/Makefile
@@ -28,6 +28,9 @@ KBUILD_CFLAGS := -m$(BITS) -O2 $(CLANG_FLAGS)
KBUILD_CFLAGS += $(CC_FLAGS_DIALECT)
KBUILD_CFLAGS += -fno-strict-aliasing -fPIE
KBUILD_CFLAGS += -Wundef
+KBUILD_CFLAGS += -Wunused
+KBUILD_CFLAGS += -Wno-unused-but-set-variable
+KBUILD_CFLAGS += -Wno-unused-const-variable
KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING
cflags-$(CONFIG_X86_32) := -march=i386
cflags-$(CONFIG_X86_64) := -mcmodel=small -mno-red-zone
next prev parent reply other threads:[~2026-06-24 12:03 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-24 12:02 [PATCH v2 0/4] x86/boot/compressed: Enable -Wunused and remove unused variables Thorsten Blum
2026-06-24 12:02 ` [PATCH v2 1/4] x86/boot/compressed: Remove unused variables in EFI helpers Thorsten Blum
2026-06-24 12:02 ` [PATCH v2 2/4] x86/boot/compressed: Clean up EFI RSDP lookup in efi_get_rsdp_addr() Thorsten Blum
2026-06-24 12:02 ` [PATCH v2 3/4] x86/boot/compressed: Mark process_mem_region() index __maybe_unused Thorsten Blum
2026-06-24 12:02 ` Thorsten Blum [this message]
2026-07-28 5:49 ` [PATCH v2 0/4] x86/boot/compressed: Enable -Wunused and remove unused variables Thorsten Blum
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