From: Sasha Levin <sashal@kernel.org>
To: masahiroy@kernel.org, michal.lkml@markovi.net
Cc: linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org,
torvalds@linux-foundation.org, gregkh@linuxfoundation.org,
stable@kernel.org
Subject: Re: [PATCH 3/3] kbuild: introduce KERNEL_VERSION2 and LINUX_VERSION_CODE2
Date: Fri, 5 Feb 2021 23:01:59 -0500 [thread overview]
Message-ID: <20210206040159.GW4035784@sasha-vm> (raw)
In-Reply-To: <20210206035033.2036180-3-sashal@kernel.org>
On Fri, Feb 05, 2021 at 10:50:33PM -0500, Sasha Levin wrote:
>SUBLEVEL only has 8 bits of space, which means that we'll overflow it
>once it reaches 256.
>
>Few of the stable branches will imminently overflow SUBLEVEL while
>there's no risk of overflowing VERSION.
>
>Thus, give SUBLEVEL 8 more bits which will be stolen from VERSION, this
>should create a better balance between the different version numbers we
>use.
>
>We can't however use the original KERNEL_VERSION and LINUX_VERSION_CODE
>as userspace has created ABI dependency on their structure, and we risk
>breaking this userspace by modifying the layout of the version integers.
>
>Cc: stable@kernel.org
>Signed-off-by: Sasha Levin <sashal@kernel.org>
>Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
>Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
I wanted to re-use an older commit but forgot to drop the two tags
above. The tags from Masahiro and Greg shouldn't be here, sorry about
that.
--
Thanks,
Sasha
next prev parent reply other threads:[~2021-02-06 5:07 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-06 3:50 [PATCH 1/3] Revert "kbuild: give the SUBLEVEL more room in KERNEL_VERSION" Sasha Levin
2021-02-06 3:50 ` [PATCH 2/3] kbuild: clamp SUBLEVEL to 255 Sasha Levin
2021-02-06 12:51 ` Greg KH
2021-02-07 2:52 ` Masahiro Yamada
2021-02-08 13:48 ` David Laight
2021-02-08 14:09 ` gregkh
2021-02-08 15:13 ` David Laight
2021-02-09 1:58 ` Masahiro Yamada
2021-02-06 3:50 ` [PATCH 3/3] kbuild: introduce KERNEL_VERSION2 and LINUX_VERSION_CODE2 Sasha Levin
2021-02-06 4:01 ` Sasha Levin [this message]
2021-02-06 12:45 ` Masahiro Yamada
2021-02-06 14:31 ` Sasha Levin
2021-02-06 12:53 ` Greg KH
2021-02-06 12:54 ` Greg KH
2021-02-06 12:06 ` [PATCH 1/3] Revert "kbuild: give the SUBLEVEL more room in KERNEL_VERSION" Masahiro Yamada
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