linux-kernel - Re: [PATCH v4 15/19] lib/crc32: make crc32c() go directly to lib

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Message-ID: <CAPnZJGAb7AM4p=HdsDhYcANCzD8=gpGjuP4wYfr2utLp3WMSNQ@mail.gmail.com>
Date: Sun, 19 Oct 2025 11:10:25 +0300
From: Askar Safin <safinaskar@...il.com>
To: ebiggers@...nel.org
Cc: ardb@...nel.org, linux-arch@...r.kernel.org, 
	linux-arm-kernel@...ts.infradead.org, linux-crypto@...r.kernel.org, 
	linux-ext4@...r.kernel.org, linux-f2fs-devel@...ts.sourceforge.net, 
	linux-kernel@...r.kernel.org, linux-mips@...r.kernel.org, 
	linux-riscv@...ts.infradead.org, linux-s390@...r.kernel.org, 
	linux-scsi@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org, 
	loongarch@...ts.linux.dev, sparclinux@...r.kernel.org, x86@...nel.org, 
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org
Subject: Re: [PATCH v4 15/19] lib/crc32: make crc32c() go directly to lib

On Sun, Oct 19, 2025 at 9:09 AM Askar Safin <safinaskar@...il.com> wrote:
>
> Eric Biggers <ebiggers@...nel.org>:
> > Now that the lower level __crc32c_le() library function is optimized for
>
> This patch (i. e. 38a9a5121c3b ("lib/crc32: make crc32c() go directly to lib"))
> solves actual bug I found in practice. So, please, backport it
> to stable kernels.

Oops. I just noticed that this patch removes module "libcrc32c".
And this breaks build for Debian kernel v6.12.48.
Previously I tested minimal build using "make localmodconfig".
Now I tried full build of Debian kernel using "dpkg-buildpackage".
And it failed, because some of Debian files reference "libcrc32c",
which is not available.

So, please, don't backport this patch to stable kernels.
I'm sorry.



-- 
Askar Safin