From: Johannes Berg <johannes@sipsolutions.net>
To: Tiwei Bie <tiwei.bie@linux.dev>,
richard@nod.at, anton.ivanov@cambridgegreys.com
Cc: linux-um@lists.infradead.org, linux-kernel@vger.kernel.org,
benjamin@sipsolutions.net, arnd@arndb.de,
tiwei.btw@antgroup.com, linux-arch@vger.kernel.org
Subject: Re: [PATCH v2 09/10] asm-generic: percpu: Add assembly guard
Date: Wed, 10 Sep 2025 14:12:16 +0200 [thread overview]
Message-ID: <ecb230a3384e22acf4fa6c03466c7db7092ad9f5.camel@sipsolutions.net> (raw)
In-Reply-To: <20250810055136.897712-10-tiwei.bie@linux.dev> (sfid-20250810_075308_080221_8093A5E9)
On Sun, 2025-08-10 at 13:51 +0800, Tiwei Bie wrote:
> From: Tiwei Bie <tiwei.btw@antgroup.com>
>
> Currently, asm/percpu.h is directly or indirectly included by
> some assembly files on x86. Some of them (e.g., checksum_32.S)
> are also used on um. But x86 and um provide different versions
> of asm/percpu.h -- um uses asm-generic/percpu.h directly.
>
> When SMP is enabled, asm-generic/percpu.h will introduce C code
> that cannot be assembled. Since asm-generic/percpu.h currently
> is not designed for use in assembly, and these assembly files
> do not actually need asm/percpu.h on um, let's add the assembly
> guard in asm-generic/percpu.h to fix this issue.
>
> Cc: Arnd Bergmann <arnd@arndb.de>
> Cc: linux-arch@vger.kernel.org
Can we get an ACK from someone for this? :) Or a reject and we need to
find other ways of doing things?
johannes
next prev parent reply other threads:[~2025-09-10 12:12 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-08-10 5:51 [PATCH v2 00/10] um: Add SMP support Tiwei Bie
2025-08-10 5:51 ` [PATCH v2 01/10] um: Stop tracking virtual CPUs via mm_cpumask() Tiwei Bie
2025-08-10 5:51 ` [PATCH v2 02/10] um: Remove unused cpu_data and current_cpu_data macros Tiwei Bie
2025-08-10 5:51 ` [PATCH v2 03/10] um: vdso: Implement __vdso_getcpu() via syscall Tiwei Bie
2025-09-10 11:59 ` Johannes Berg
2025-09-11 4:29 ` Tiwei Bie
2025-09-21 20:00 ` Thomas Weißschuh
2025-09-22 4:50 ` Tiwei Bie
2025-09-22 12:05 ` Thomas Weißschuh
2025-09-22 12:12 ` Johannes Berg
2025-09-22 14:01 ` Thomas Weißschuh
2025-09-22 15:14 ` Johannes Berg
2025-09-22 16:04 ` Thomas Weißschuh
2025-09-22 17:07 ` Johannes Berg
2025-09-25 17:08 ` Thomas Weißschuh
2025-10-21 13:20 ` Johannes Berg
2025-08-10 5:51 ` [PATCH v2 04/10] um: Turn signals_* into thread-local variables Tiwei Bie
2025-09-10 12:15 ` Johannes Berg
2025-09-11 4:34 ` Tiwei Bie
2025-09-11 7:37 ` Benjamin Berg
2025-09-11 8:06 ` Benjamin Berg
2025-09-12 0:30 ` Tiwei Bie
2025-09-12 7:58 ` Benjamin Berg
2025-09-12 13:27 ` Tiwei Bie
2025-09-11 9:44 ` Johannes Berg
2025-09-11 10:35 ` Benjamin Berg
2025-08-10 5:51 ` [PATCH v2 05/10] um: Determine sleep based on need_resched() Tiwei Bie
2025-09-10 12:10 ` Johannes Berg
2025-09-11 4:39 ` Tiwei Bie
2025-09-11 6:59 ` Johannes Berg
2025-09-12 0:59 ` Tiwei Bie
2025-09-11 9:27 ` Johannes Berg
2025-09-12 0:54 ` Tiwei Bie
2025-08-10 5:51 ` [PATCH v2 06/10] um: Define timers on a per-CPU basis Tiwei Bie
2025-08-10 9:49 ` kernel test robot
2025-08-10 5:51 ` [PATCH v2 07/10] um: Remove unused ipi_pipe field from cpuinfo_um Tiwei Bie
2025-08-10 5:51 ` [PATCH v2 08/10] um: Add initial SMP support Tiwei Bie
2025-09-11 9:32 ` Johannes Berg
2025-09-12 0:45 ` Tiwei Bie
2025-09-12 7:58 ` Johannes Berg
2025-08-10 5:51 ` [PATCH v2 09/10] asm-generic: percpu: Add assembly guard Tiwei Bie
2025-09-10 12:12 ` Johannes Berg [this message]
2025-08-10 5:51 ` [PATCH v2 10/10] um: Enable SMP support on x86 Tiwei Bie
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