linux-kernel - Re: [PATCH RESEND] kernel/fork: Update obsolete use_mm references to kthread_use

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Message-ID: <cbcc95f1-5039-4fe3-bc7a-c8edc29f5b11@kernel.org>
Date: Tue, 6 Jan 2026 10:29:03 +0100
From: "David Hildenbrand (Red Hat)" <david@...nel.org>
To: Michal Hocko <mhocko@...e.com>,
 mingzhu.wang(王明珠) <mingzhu.wang@...nssion.com>
Cc: "kees@...nel.org" <kees@...nel.org>, "mingo@...hat.com"
 <mingo@...hat.com>, "peterz@...radead.org" <peterz@...radead.org>,
 "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
 "dietmar.eggemann@....com" <dietmar.eggemann@....com>,
 "mgorman@...e.de" <mgorman@...e.de>, "vbabka@...e.cz" <vbabka@...e.cz>,
 "rppt@...nel.org" <rppt@...nel.org>, "surenb@...gle.com"
 <surenb@...gle.com>, "linux-mm@...ck.org" <linux-mm@...ck.org>,
 "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
 Jiazi Li <jqqlijiazi@...il.com>
Subject: Re: [PATCH RESEND] kernel/fork: Update obsolete use_mm references to
 kthread_use_mm

On 1/6/26 10:26, Michal Hocko wrote:
> On Tue 06-01-26 07:05:28, mingzhu.wang(王明珠) wrote:
>> The comment for get_task_mm() in kernel/fork.c incorrectly references the deprecated function `use_mm()`, which has been renamed to `kthread_use_mm()` in kernel/kthread.c.
>> This patch updates the documentation to reflect the current function names, ensuring accuracy when developers refer to the kernel thread memory context API.
>> No functional changes were introduced.
>>
>> Signed-off-by: mingzhu.wang <mingzhu.wang@...nssion.com>
>> ---
>>   kernel/fork.c | 2 +-
>>   1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/kernel/fork.c b/kernel/fork.c index c4ada32598bd..64e228c541bc 100644
>> --- a/kernel/fork.c
>> +++ b/kernel/fork.c
>> @@ -1312,7 +1312,7 @@ struct file *get_task_exe_file(struct task_struct *task)
>>    * @task: The task.
>>    *
>>    * Returns %NULL if the task has no mm.  Checks PF_KTHREAD (meaning
>> - * this kernel workthread has transiently adopted a user mm with use_mm,
>> + * this kernel workthread has transiently adopted a user mm with
>> + kthread_use_mm,
> 
> Please do not wrap the line here.

But please do so in the patch description, where the maximum should 
usually be 72 characters per line. :)

-- 
Cheers

David