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

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Message-ID: <aVzVVTS3gjtz4XNB@tiehlicka>
Date: Tue, 6 Jan 2026 10:26:45 +0100
From: Michal Hocko <mhocko@...e.com>
To: 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>,
	"david@...hat.com" <david@...hat.com>,
	"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 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.

>   * to do its AIO) is not set and if so returns a reference to it, after
>   * bumping up the use count.  User must release the mm via mmput()
>   * after use.  Typically used by /proc and ptrace.
> --
> 2.34.1

-- 
Michal Hocko
SUSE Labs