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khugepaged: remove unneeded return value of khugepaged_collapse_pte_mapped_thps()

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Patch series "Cleanup and fixup for khugepaged", v2.

This series contains cleanups to remove unneeded return value, use
helper function and so on.  And there is one fix to correct the wrong
result value for trace_mm_collapse_huge_page_isolate().

This patch (of 4):

The return value of khugepaged_collapse_pte_mapped_thps() is never checked
since it's introduced.  We should remove such unneeded return value.

Link: https://lkml.kernel.org/r/20210306032947.35921-1-linmiaohe@huawei.com
Link: https://lkml.kernel.org/r/20210306032947.35921-2-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Ebru Akagunduz <ebru.akagunduz@gmail.com>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Miaohe Lin 2021-05-04 18:33:37 -07:00 committed by Linus Torvalds
parent d4241a049a
commit 0edf61e5ee
1 changed files with 4 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
mm/khugepaged.c
View File

@ -1533,16 +1533,16 @@ abort:
goto drop_hpage;
}
static int khugepaged_collapse_pte_mapped_thps(struct mm_slot *mm_slot)
static void khugepaged_collapse_pte_mapped_thps(struct mm_slot *mm_slot)
{
struct mm_struct *mm = mm_slot->mm;
int i;
if (likely(mm_slot->nr_pte_mapped_thp == 0))
return 0;
return;
if (!mmap_write_trylock(mm))
return -EBUSY;
return;
if (unlikely(khugepaged_test_exit(mm)))
goto out;
@ -1553,7 +1553,6 @@ static int khugepaged_collapse_pte_mapped_thps(struct mm_slot *mm_slot)
out:
mm_slot->nr_pte_mapped_thp = 0;
mmap_write_unlock(mm);
return 0;
}
static void retract_page_tables(struct address_space *mapping, pgoff_t pgoff)
@ -2057,9 +2056,8 @@ static void khugepaged_scan_file(struct mm_struct *mm,
BUILD_BUG();
}
static int khugepaged_collapse_pte_mapped_thps(struct mm_slot *mm_slot)
static void khugepaged_collapse_pte_mapped_thps(struct mm_slot *mm_slot)
{
return 0;
}
#endif