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mm/mlock: drop dead code in count_mm_mlocked_page_nr()

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The check for mm being null has never been needed since the only caller
has always passed in current->mm.  Remove the check from
count_mm_mlocked_page_nr().

Link: https://lkml.kernel.org/r/20220615174050.738523-1-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Suggested-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Liam Howlett 2022-06-15 17:40:58 +00:00 committed by Andrew Morton
parent c154124fe9
commit 66071896cd
1 changed files with 1 additions and 3 deletions
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4
mm/mlock.c
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@ -531,14 +531,12 @@ static unsigned long count_mm_mlocked_page_nr(struct mm_struct *mm,
unsigned long end;
VMA_ITERATOR(vmi, mm, start);
if (mm == NULL)
mm = current->mm;
/* Don't overflow past ULONG_MAX */
if (unlikely(ULONG_MAX - len < start))
end = ULONG_MAX;
else
end = start + len;
for_each_vma_range(vmi, vma, end) {
if (vma->vm_flags & VM_LOCKED) {
if (start > vma->vm_start)