From: "Christophe Leroy (CS GROUP)" <chleroy@kernel.org>
To: Venkat <venkat88@linux.ibm.com>,
Mukesh Kumar Chaurasiya <mkchauras@linux.ibm.com>,
Peter Zijlstra <peterz@infradead.org>
Cc: Madhavan Srinivasan <maddy@linux.ibm.com>,
Michael Ellerman <mpe@ellerman.id.au>,
Nicholas Piggin <npiggin@gmail.com>,
oleg@redhat.com, kees@kernel.org, luto@amacapital.net,
wad@chromium.org, mchauras@linux.ibm.com, thuth@redhat.com,
Shrikanth Hegde <sshegde@linux.ibm.com>,
Andrew Morton <akpm@linux-foundation.org>,
macro@orcam.me.uk, deller@gmx.de, ldv@strace.io,
charlie@rivosinc.com, segher@kernel.crashing.org,
bigeasy@linutronix.de, namcao@linutronix.de,
Thomas Gleixner <tglx@linutronix.de>,
Kan Liang <kan.liang@linux.intel.com>,
mark.barnett@arm.com,
linuxppc-dev <linuxppc-dev@lists.ozlabs.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v3 0/8] Generic IRQ entry/exit support for powerpc
Date: Thu, 8 Jan 2026 07:05:42 +0100 [thread overview]
Message-ID: <e18ac87b-0034-4297-ae15-0dd0a36abb15@kernel.org> (raw)
In-Reply-To: <3BBCC728-0BF9-484A-85F9-2760DEFD56BD@linux.ibm.com>
Hi,
Le 08/01/2026 à 06:16, Venkat a écrit :
> With this patch set, build fails.
>
> Failure logs:
>
> ld: init/main.o: in function `do_one_initcall':
> /root/linux/init/main.c:1384: undefined reference to `memcpy'
I guess you have KASAN enabled ?
See
https://lore.kernel.org/all/0947502d-96e3-4179-ae48-603de74dc7b3@kernel.org/
This is because of commit 69d4c0d32186 ("entry, kasan, x86: Disallow
overriding mem*() functions") which changed the core behaviour in 2023
without taking care of other architectures than x86 who was the only one
with CONFIG_GENERIC_ENTRY ?
For powerpc the expected behaviour introduced in 2019 by commit
26deb04342e3 ("powerpc: prepare string/mem functions for KASAN") needs
to be modified the same way to fit with the core change.
Christophe
next prev parent reply other threads:[~2026-01-08 6:06 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-12-29 4:54 [PATCH v3 0/8] Generic IRQ entry/exit support for powerpc Mukesh Kumar Chaurasiya
2025-12-29 4:54 ` [PATCH v3 1/8] powerpc: rename arch_irq_disabled_regs Mukesh Kumar Chaurasiya
2026-01-08 8:30 ` Jinjie Ruan
2025-12-29 4:54 ` [PATCH v3 2/8] powerpc: Prepare to build with generic entry/exit framework Mukesh Kumar Chaurasiya
2025-12-29 4:54 ` [PATCH v3 3/8] powerpc: introduce arch_enter_from_user_mode Mukesh Kumar Chaurasiya
2025-12-29 4:54 ` [PATCH v3 4/8] powerpc: Introduce syscall exit arch functions Mukesh Kumar Chaurasiya
2025-12-29 4:54 ` [PATCH v3 5/8] powerpc: add exit_flags field in pt_regs Mukesh Kumar Chaurasiya
2025-12-29 4:54 ` [PATCH v3 6/8] powerpc: Prepare for IRQ entry exit Mukesh Kumar Chaurasiya
2025-12-29 4:54 ` [PATCH v3 7/8] powerpc: Enable IRQ generic entry/exit path Mukesh Kumar Chaurasiya
2026-01-01 17:31 ` Shrikanth Hegde
2026-01-06 4:59 ` Mukesh Kumar Chaurasiya
2025-12-29 4:54 ` [PATCH v3 8/8] powerpc: Enable Generic Entry/Exit for syscalls Mukesh Kumar Chaurasiya
2026-01-01 9:07 ` [PATCH v3 0/8] Generic IRQ entry/exit support for powerpc Shrikanth Hegde
2026-01-06 5:01 ` Mukesh Kumar Chaurasiya
2026-01-08 5:16 ` Venkat
2026-01-08 6:05 ` Christophe Leroy (CS GROUP) [this message]
2026-01-08 9:09 ` Mukesh Kumar Chaurasiya
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