From: Ilya Leoshkevich <iii@linux.ibm.com>
To: Heiko Carstens <hca@linux.ibm.com>,
Alexander Gordeev <agordeev@linux.ibm.com>,
Sven Schnelle <svens@linux.ibm.com>,
Vasily Gorbik <gor@linux.ibm.com>,
Christian Borntraeger <borntraeger@linux.ibm.com>
Cc: linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org
Subject: Re: [PATCH v2 02/10] s390/ftrace: Serialize text patching with text_mutex
Date: Wed, 28 Oct 2026 11:54:38 +0100 [thread overview]
Message-ID: <22f1a455-fc80-4a0c-aa44-a347710bacaa@linux.ibm.com> (raw)
In-Reply-To: <20261027143030.3154657-3-hca@linux.ibm.com>
On 10/27/26 15:30, Heiko Carstens wrote:
> Add ftrace_arch_code_modify_prepare() and extend
> ftrace_arch_code_modify_post_process() to acquire and release
> text_mutex when ftrace code is modified.
>
> Also add locking to ftrace_init_nop(). This way s390 uses text_mutex
> like e.g. x86 and riscv.
>
> This is part of larger series where at the end s390_kernel_write()
> requires that callers hold text_mutex for serialization.
>
> Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
> ---
> arch/s390/kernel/ftrace.c | 11 +++++++++++
> 1 file changed, 11 insertions(+)
Reviewed-by: Ilya Leoshkevich <iii@linux.ibm.com>
next prev parent reply other threads:[~2026-10-28 10:54 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-27 14:30 [PATCH v2 00/10] s390: Consistent usage of text_mutex Heiko Carstens
2026-10-27 14:30 ` [PATCH v2 01/10] s390/jump_label: Serialize text patching with text_mutex Heiko Carstens
2026-10-28 10:50 ` Ilya Leoshkevich
2026-10-27 14:30 ` [PATCH v2 02/10] s390/ftrace: " Heiko Carstens
2026-10-28 10:54 ` Ilya Leoshkevich [this message]
2026-10-27 14:30 ` [PATCH v2 03/10] s390/bpf: " Heiko Carstens
2026-10-28 10:56 ` Ilya Leoshkevich
2026-10-27 14:30 ` [PATCH v2 04/10] s390/runtime-const: " Heiko Carstens
2026-10-28 10:58 ` Ilya Leoshkevich
2026-10-28 11:09 ` Heiko Carstens
2026-10-28 12:22 ` Ilya Leoshkevich
2026-10-28 13:43 ` Heiko Carstens
2026-10-27 14:30 ` [PATCH v2 05/10] s390/module: " Heiko Carstens
2026-10-28 10:59 ` Ilya Leoshkevich
2026-10-27 14:30 ` [PATCH v2 06/10] s390/stackprotector: " Heiko Carstens
2026-10-28 12:23 ` Ilya Leoshkevich
2026-10-27 14:30 ` [PATCH v2 07/10] s390/nospec-branch: " Heiko Carstens
2026-10-28 12:24 ` Ilya Leoshkevich
2026-10-27 14:30 ` [PATCH v2 08/10] s390/alternative: " Heiko Carstens
2026-10-28 12:25 ` Ilya Leoshkevich
2026-10-27 14:30 ` [PATCH v2 09/10] s390/uaccess: Move s390_kernel_write() to asm/text-patching.h Heiko Carstens
2026-10-28 12:26 ` Ilya Leoshkevich
2026-10-27 14:30 ` [PATCH v2 10/10] s390/maccess: Remove spinlock from __s390_kernel_write() Heiko Carstens
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