diff options
| author | Matthew Wilcox (Oracle) <willy@infradead.org> | 2024-04-16 06:17:49 +0300 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-05-06 03:53:39 +0300 |
| commit | 66924fdaf835f5fc6fe78d92a79afcca7d4db7ec (patch) | |
| tree | 2a646392de386ea366f7cdee02d49dd90e32e58d /include | |
| parent | 324ecaee46f86c1eaf083fd82eaf997335e70163 (diff) | |
| download | linux-66924fdaf835f5fc6fe78d92a79afcca7d4db7ec.tar.xz | |
buffer: add kernel-doc for brelse() and __brelse()
Move the documentation for __brelse() to brelse(), format it as kernel-doc
and update it from talking about pages to folios.
Link: https://lkml.kernel.org/r/20240416031754.4076917-6-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Pankaj Raghav <p.raghav@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/buffer_head.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/include/linux/buffer_head.h b/include/linux/buffer_head.h index 56a1e9c1e71e..c145817c6ca0 100644 --- a/include/linux/buffer_head.h +++ b/include/linux/buffer_head.h @@ -303,6 +303,22 @@ static inline void put_bh(struct buffer_head *bh) atomic_dec(&bh->b_count); } +/** + * brelse - Release a buffer. + * @bh: The buffer to release. + * + * Decrement a buffer_head's reference count. If @bh is NULL, this + * function is a no-op. + * + * If all buffers on a folio have zero reference count, are clean + * and unlocked, and if the folio is unlocked and not under writeback + * then try_to_free_buffers() may strip the buffers from the folio in + * preparation for freeing it (sometimes, rarely, buffers are removed + * from a folio but it ends up not being freed, and buffers may later + * be reattached). + * + * Context: Any context. + */ static inline void brelse(struct buffer_head *bh) { if (bh) |