Re: FAILED: patch "[PATCH] mm/huge_memory: merge uniform_split_supported() and" failed to apply to 6.18-stable tree

[Wei Yang <richard.weiyang@gmail.com>]

On Fri, Jan 02, 2026 at 01:24:28PM +0100, Greg KH wrote:
>On Tue, Dec 30, 2025 at 03:11:35AM +0000, Wei Yang wrote:
>> On Mon, Dec 29, 2025 at 01:33:25PM +0100, gregkh@linuxfoundation.org wrote:
>> >
>> >The patch below does not apply to the 6.18-stable tree.
>> >If someone wants it applied there, or to any other stable or longterm
>> >tree, then please email the backport, including the original git commit
>> >id to <stable@vger.kernel.org>.
>> >
>> >To reproduce the conflict and resubmit, you may use the following commands:
>> >
>> >git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.18.y
>> >git checkout FETCH_HEAD
>> >git cherry-pick -x 8a0e4bdddd1c998b894d879a1d22f1e745606215
>> ># <resolve conflicts, build, test, etc.>
>> >git commit -s
>> >git send-email --to '<stable@vger.kernel.org>' --in-reply-to '2025122925-victory-numeral-2346@gregkh' --subject-prefix 'PATCH 6.18.y' HEAD^..
>> >
>> >Possible dependencies:
>> >
>> >
>> 
>> Hi, Greg
>> 
>> This one is not a fix to some bug.
>> 
>> We found a real bug during the mail discussion, which is 
>> 
>>     commit cff47b9e39a6abf03dde5f4f156f841b0c54bba0
>>     Author: Wei Yang <richard.weiyang@gmail.com>
>>     Date:   Wed Nov 19 23:53:02 2025 +0000
>>     
>>         mm/huge_memory: fix NULL pointer deference when splitting folio
>> 
>> It looks has been back ported to 6.18.y and 6.12.y.
>
>I do not understand, should this not be applied?  Or should it be
>applied?

Upstream commit

    cff47b9e39a6 2025-11-24 mm/huge_memory: fix NULL pointer deference when splitting folio

should be applied and already applied to 6.18.y and 6.12.y.

Upstream commit

    8a0e4bdddd1c 2025-11-24 mm/huge_memory: merge uniform_split_supported() and non_uniform_split_supported()

is not necessary to be back ported.

>
>confused,
>
>greg k-h

-- 
Wei Yang
Help you, Help me