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mm: thp: simplify split_huge_pages_pid()

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The helper find_get_task_by_vpid() can totally replace the task_struct
find logic in split_huge_pages_pid(), so use it to simplify the code. 
Also delete the needless comments for the helper function name already
explains what it's doing here.

Link: https://lkml.kernel.org/r/20240905153028.1205128-1-sunnanyong@huawei.com
Signed-off-by: Nanyong Sun <sunnanyong@huawei.com>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Nanyong Sun 2024-09-05 23:30:28 +08:00 committed by Andrew Morton
parent 46dcc7c92e
commit e4bfc67857
1 changed files with 1 additions and 6 deletions
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7
mm/huge_memory.c
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@ -3819,16 +3819,11 @@ static int split_huge_pages_pid(int pid, unsigned long vaddr_start,
vaddr_start &= PAGE_MASK;
vaddr_end &= PAGE_MASK;
/* Find the task_struct from pid */
rcu_read_lock();
task = find_task_by_vpid(pid);
task = find_get_task_by_vpid(pid);
if (!task) {
rcu_read_unlock();
ret = -ESRCH;
goto out;
}
get_task_struct(task);
rcu_read_unlock();
/* Find the mm_struct */
mm = get_task_mm(task);