[PATCH v2 1/4] khugepaged: remove unneeded return value of khugepaged_collapse_pte_mapped_thps()

[Miaohe Lin]

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

Signed-off-by: Miaohe Lin <linmia...@huawei.com>
Acked-by: Kirill A. Shutemov <kirill.shute...@linux.intel.com>
---
 mm/khugepaged.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/mm/khugepaged.c b/mm/khugepaged.c
index a7d6cb912b05..d43812c5ce16 100644
--- a/mm/khugepaged.c
+++ b/mm/khugepaged.c
@@ -1533,16 +1533,16 @@ void collapse_pte_mapped_thp(struct mm_struct *mm, 
unsigned long addr)
        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
 
-- 
2.19.1