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| author | Matthew Wilcox (Oracle) <willy@infradead.org> | 2022-02-09 20:21:26 +0000 |
|---|---|---|
| committer | Matthew Wilcox (Oracle) <willy@infradead.org> | 2022-03-14 15:43:16 -0400 |
| commit | cd1067beeebfe23fc8cab071790fefb273962d51 (patch) | |
| tree | f8c559da033a87064a4370c50e7681686ffe14a5 | |
| parent | 4495a96c4cd4a3c9c0649e2a19e0e9bde8243a6e (diff) | |
| download | lwn-cd1067beeebfe23fc8cab071790fefb273962d51.tar.gz lwn-cd1067beeebfe23fc8cab071790fefb273962d51.zip | |
buffer: Add folio_buffers()
While there is no intent to use large folios in filesystems using buffer
heads, converting the filesystems to use single-page folios is still worth
doing to remove legacy infrastructure and hidden calls to compound_head().
These helper functions are needed for that conversion to take place.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Tested-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Acked-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Tested-by: Mike Marshall <hubcap@omnibond.com> # orangefs
Tested-by: David Howells <dhowells@redhat.com> # afs
| -rw-r--r-- | include/linux/buffer_head.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/buffer_head.h b/include/linux/buffer_head.h index 36f33685c8c0..3451f1fcda12 100644 --- a/include/linux/buffer_head.h +++ b/include/linux/buffer_head.h @@ -144,6 +144,7 @@ BUFFER_FNS(Defer_Completion, defer_completion) ((struct buffer_head *)page_private(page)); \ }) #define page_has_buffers(page) PagePrivate(page) +#define folio_buffers(folio) folio_get_private(folio) void buffer_check_dirty_writeback(struct page *page, bool *dirty, bool *writeback); |