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| author | Matthew Wilcox <willy@infradead.org> | 2023-03-24 21:01:01 +0300 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2023-04-06 20:39:50 +0300 |
| commit | e999a5c5a19cf3b679f3d93c49ad5f5c04e4806c (patch) | |
| tree | 712cf4371e6126d1c4159078c3e00b02815d7848 /include/linux/pagemap.h | |
| parent | 361eb69fc99f1a8f1d653d69ecd742f3cbb896be (diff) | |
| download | linux-e999a5c5a19cf3b679f3d93c49ad5f5c04e4806c.tar.xz | |
fs: Add FGP_WRITEBEGIN
This particular combination of flags is used by most filesystems
in their ->write_begin method, although it does find use in a
few other places. Before folios, it warranted its own function
(grab_cache_page_write_begin()), but I think that just having specialised
flags is enough. It certainly helps the few places that have been
converted from grab_cache_page_write_begin() to __filemap_get_folio().
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Link: https://lore.kernel.org/r/20230324180129.1220691-2-willy@infradead.org
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'include/linux/pagemap.h')
| -rw-r--r-- | include/linux/pagemap.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h index 0acb8e1fb7af..51b75b89730e 100644 --- a/include/linux/pagemap.h +++ b/include/linux/pagemap.h @@ -507,6 +507,8 @@ pgoff_t page_cache_prev_miss(struct address_space *mapping, #define FGP_ENTRY 0x00000080 #define FGP_STABLE 0x00000100 +#define FGP_WRITEBEGIN (FGP_LOCK | FGP_WRITE | FGP_CREAT | FGP_STABLE) + struct folio *__filemap_get_folio(struct address_space *mapping, pgoff_t index, int fgp_flags, gfp_t gfp); struct page *pagecache_get_page(struct address_space *mapping, pgoff_t index, |