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| author | Jaegeuk Kim <jaegeuk@kernel.org> | 2021-07-04 22:11:25 -0700 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2021-07-05 17:17:30 -0700 |
| commit | c9ebd3df43c067b57203737484076345b6df2fb4 (patch) | |
| tree | d4733764e30647f28f22adc08f85bfa5cf6057a8 /fs/f2fs | |
| parent | 151b1982be5d9f4ca641687ee1a4bb4fba5d26cf (diff) | |
| download | linux-c9ebd3df43c067b57203737484076345b6df2fb4.tar.bz2 | |
f2fs: initialize page->private when using for our internal use
We need to guarantee it's initially zero. Otherwise, it'll hurt entire flag
operations.
Fixes: b763f3bedc2d ("f2fs: restructure f2fs page.private layout")
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs')
| -rw-r--r-- | fs/f2fs/data.c | 2 | ||||
| -rw-r--r-- | fs/f2fs/f2fs.h | 5 |
2 files changed, 6 insertions, 1 deletions
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index 3a01a1b50104..d2cf48c5a2e4 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -3819,6 +3819,8 @@ int f2fs_migrate_page(struct address_space *mapping, get_page(newpage); } + /* guarantee to start from no stale private field */ + set_page_private(newpage, 0); if (PagePrivate(page)) { set_page_private(newpage, page_private(page)); SetPagePrivate(newpage); diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 65befc68d88e..ee8eb33e2c25 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -1331,7 +1331,8 @@ enum { #define PAGE_PRIVATE_GET_FUNC(name, flagname) \ static inline bool page_private_##name(struct page *page) \ { \ - return test_bit(PAGE_PRIVATE_NOT_POINTER, &page_private(page)) && \ + return PagePrivate(page) && \ + test_bit(PAGE_PRIVATE_NOT_POINTER, &page_private(page)) && \ test_bit(PAGE_PRIVATE_##flagname, &page_private(page)); \ } @@ -1341,6 +1342,7 @@ static inline void set_page_private_##name(struct page *page) \ if (!PagePrivate(page)) { \ get_page(page); \ SetPagePrivate(page); \ + set_page_private(page, 0); \ } \ set_bit(PAGE_PRIVATE_NOT_POINTER, &page_private(page)); \ set_bit(PAGE_PRIVATE_##flagname, &page_private(page)); \ @@ -1392,6 +1394,7 @@ static inline void set_page_private_data(struct page *page, unsigned long data) if (!PagePrivate(page)) { get_page(page); SetPagePrivate(page); + set_page_private(page, 0); } set_bit(PAGE_PRIVATE_NOT_POINTER, &page_private(page)); page_private(page) |= data << PAGE_PRIVATE_MAX; |