diff options
| author | Jeff Garzik <jeff@garzik.org> | 2006-09-26 13:13:19 -0400 |
|---|---|---|
| committer | Jeff Garzik <jeff@garzik.org> | 2006-09-26 13:13:19 -0400 |
| commit | c226951b93f7cd7c3a10b17384535b617bd43fd0 (patch) | |
| tree | 07b8796a5c99fbbf587b8d0dbcbc173cfe5e381e /include/linux/pagemap.h | |
| parent | b0df3bd1e553e901ec7297267611a5db88240b38 (diff) | |
| parent | e8216dee838c09776680a6f1a2e54d81f3cdfa14 (diff) | |
| download | lwn-c226951b93f7cd7c3a10b17384535b617bd43fd0.tar.gz lwn-c226951b93f7cd7c3a10b17384535b617bd43fd0.zip | |
Merge branch 'master' into upstream
Diffstat (limited to 'include/linux/pagemap.h')
| -rw-r--r-- | include/linux/pagemap.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h index 0a2f5d27f60e..64f950925151 100644 --- a/include/linux/pagemap.h +++ b/include/linux/pagemap.h @@ -130,14 +130,29 @@ static inline pgoff_t linear_page_index(struct vm_area_struct *vma, } extern void FASTCALL(__lock_page(struct page *page)); +extern void FASTCALL(__lock_page_nosync(struct page *page)); extern void FASTCALL(unlock_page(struct page *page)); +/* + * lock_page may only be called if we have the page's inode pinned. + */ static inline void lock_page(struct page *page) { might_sleep(); if (TestSetPageLocked(page)) __lock_page(page); } + +/* + * lock_page_nosync should only be used if we can't pin the page's inode. + * Doesn't play quite so well with block device plugging. + */ +static inline void lock_page_nosync(struct page *page) +{ + might_sleep(); + if (TestSetPageLocked(page)) + __lock_page_nosync(page); +} /* * This is exported only for wait_on_page_locked/wait_on_page_writeback. |