mm: migrate: change to use bool type for 'page_was_mapped'

Change to use bool type for 'page_was_mapped' variable making it more
readable.

Link: https://lkml.kernel.org/r/ce1279df18d2c163998c403e0b5ec6d3f6f90f7a.1629447552.git.baolin.wang@linux.alibaba.com
Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Reviewed-by: Yang Shi <shy828301@gmail.com>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>

diff --git a/mm/migrate.c b/mm/migrate.c
index 0e7da2d0a0244a0c70e94fb35af05d15cf3fe8a9..dbfa4ef4edeff2501d47c776d7bb59db56f471ce 100644 (file)
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -953,7 +953,7 @@ static int __unmap_and_move(struct page *page, struct page *newpage,
                                int force, enum migrate_mode mode)
 {
        int rc = -EAGAIN;
-       int page_was_mapped = 0;
+       bool page_was_mapped = false;
        struct anon_vma *anon_vma = NULL;
        bool is_lru = !__PageMovable(page);
 
@@ -1056,7 +1056,7 @@ static int __unmap_and_move(struct page *page, struct page *newpage,
                VM_BUG_ON_PAGE(PageAnon(page) && !PageKsm(page) && !anon_vma,
                                page);
                try_to_migrate(page, 0);
-               page_was_mapped = 1;
+               page_was_mapped = true;
        }
 
        if (!page_mapped(page))