From: "Thomas Weißschuh" <thomas.weissschuh@linutronix.de>
To: "David S. Miller" <davem@davemloft.net>,
Andreas Larsson <andreas@gaisler.com>,
Andy Lutomirski <luto@kernel.org>,
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>,
Arnd Bergmann <arnd@arndb.de>,
Heiko Carstens <hca@linux.ibm.com>,
Vasily Gorbik <gor@linux.ibm.com>,
Alexander Gordeev <agordeev@linux.ibm.com>,
Christian Borntraeger <borntraeger@linux.ibm.com>,
Sven Schnelle <svens@linux.ibm.com>,
Madhavan Srinivasan <maddy@linux.ibm.com>,
Michael Ellerman <mpe@ellerman.id.au>,
Nicholas Piggin <npiggin@gmail.com>,
"Christophe Leroy (CS GROUP)" <chleroy@kernel.org>
Cc: sparclinux@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-arch@vger.kernel.org, linux-s390@vger.kernel.org,
"David Laight" <david.laight.linux@gmail.com>,
linuxppc-dev@lists.ozlabs.org,
"Thomas Weißschuh" <thomas.weissschuh@linutronix.de>
Subject: [PATCH v2 3/5] s390: Add -m64 to KBUILD_CPPFLAGS
Date: Mon, 02 Mar 2026 08:58:39 +0100 [thread overview]
Message-ID: <20260302-vdso-compat-checkflags-v2-3-78e55baa58ba@linutronix.de> (raw)
In-Reply-To: <20260302-vdso-compat-checkflags-v2-0-78e55baa58ba@linutronix.de>
Some non-code files, like linkescripts, are preprocessed with the C
preprocessor and make use of regular kernel headers.
As -m64 is not passed to those preprocessor invocations this leads
to an inconsistency between __BITS_PER_LONG and the C type 'long'.
An upcoming consistency check will be tripped by this.
Make sure -m64 is also defined for those preprocessing steps.
As KBUILD_CPPFLAGS is inherited by both KBUILD_AFLAGS and KBUILD_CFLAGS,
drop -m64 from these variables.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
---
arch/s390/Makefile | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/arch/s390/Makefile b/arch/s390/Makefile
index d78ad6885ca2..02bc948a4a56 100644
--- a/arch/s390/Makefile
+++ b/arch/s390/Makefile
@@ -12,8 +12,7 @@ LD_BFD := elf64-s390
KBUILD_LDFLAGS := -m elf64_s390
KBUILD_AFLAGS_MODULE += -fPIC
KBUILD_CFLAGS_MODULE += -fPIC
-KBUILD_AFLAGS += -m64
-KBUILD_CFLAGS += -m64
+KBUILD_CPPFLAGS += -m64
KBUILD_CFLAGS += -fPIC
LDFLAGS_vmlinux := $(call ld-option,-no-pie)
extra_tools := relocs
--
2.53.0
next prev parent reply other threads:[~2026-03-02 7:59 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-02 7:58 [PATCH v2 0/5] vDSO: Use 32-bit CHECKFLAGS for compat vDSO Thomas Weißschuh
2026-03-02 7:58 ` [PATCH v2 1/5] x86/vdso: " Thomas Weißschuh
2026-03-02 7:58 ` [PATCH v2 2/5] sparc64: vdso: " Thomas Weißschuh
2026-03-02 7:58 ` Thomas Weißschuh [this message]
2026-03-02 8:42 ` [PATCH v2 3/5] s390: Add -m64 to KBUILD_CPPFLAGS Arnd Bergmann
2026-03-02 7:58 ` [PATCH v2 4/5] powerpc/audit: directly include unistd_32.h from compat_audit.c Thomas Weißschuh
2026-03-02 8:41 ` Arnd Bergmann
2026-03-02 7:58 ` [PATCH v2 5/5] asm-generic/bitsperlong.h: Add sanity checks for __BITS_PER_LONG Thomas Weißschuh
2026-03-06 10:43 ` [PATCH v2 0/5] vDSO: Use 32-bit CHECKFLAGS for compat vDSO Christophe Leroy (CS GROUP)
2026-03-06 13:08 ` Thomas Weißschuh
2026-03-06 13:26 ` Christophe Leroy (CS GROUP)
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