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| author | NeilBrown <neilb@suse.de> | 2014-09-24 11:28:32 +1000 |
|---|---|---|
| committer | Trond Myklebust <trond.myklebust@primarydata.com> | 2014-09-25 08:25:09 -0400 |
| commit | a4796e37c12e177572b80864cbab9c907ea250b0 (patch) | |
| tree | 0b268cf842c4b2531f408ff35559f0135bf32df6 /include/linux/pagemap.h | |
| parent | cbbce82209490df8b68da9aec0d642451fe0a668 (diff) | |
| download | lwn-a4796e37c12e177572b80864cbab9c907ea250b0.tar.gz lwn-a4796e37c12e177572b80864cbab9c907ea250b0.zip | |
MM: export page_wakeup functions
This will allow NFS to wait for PG_private to be cleared and,
particularly, to send a wake-up when it is.
Signed-off-by: NeilBrown <neilb@suse.de>
Acked-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Diffstat (limited to 'include/linux/pagemap.h')
| -rw-r--r-- | include/linux/pagemap.h | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h index 87f9e4230d3a..2dca0cef3506 100644 --- a/include/linux/pagemap.h +++ b/include/linux/pagemap.h @@ -496,8 +496,8 @@ static inline int lock_page_or_retry(struct page *page, struct mm_struct *mm, } /* - * This is exported only for wait_on_page_locked/wait_on_page_writeback. - * Never use this directly! + * This is exported only for wait_on_page_locked/wait_on_page_writeback, + * and for filesystems which need to wait on PG_private. */ extern void wait_on_page_bit(struct page *page, int bit_nr); @@ -512,6 +512,12 @@ static inline int wait_on_page_locked_killable(struct page *page) return 0; } +extern wait_queue_head_t *page_waitqueue(struct page *page); +static inline void wake_up_page(struct page *page, int bit) +{ + __wake_up_bit(page_waitqueue(page), &page->flags, bit); +} + /* * Wait for a page to be unlocked. * |