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| author | Paul Mundt <lethal@linux-sh.org> | 2007-05-08 00:37:41 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-08 11:15:27 -0700 |
| commit | 5e841b88d23d0ea0a6ee4e76c489899d4d23ce25 (patch) | |
| tree | 7268b4bbb85aa7b1c72f54f7f8cd309b34cfecce /drivers/video/fb_defio.c | |
| parent | 7bf1ea33ad70cf49638092367d52859fbbc44fee (diff) | |
| download | linux-5e841b88d23d0ea0a6ee4e76c489899d4d23ce25.tar.bz2 | |
fb: fsync() method for deferred I/O flush.
There are cases when we do not want to wait on the delay for automatically
updating the "real" framebuffer, this implements a simple ->fsync() hook
for explicitly flushing the deferred I/O work. The ->page_mkwrite()
handler will rearm the work queue normally.
(akpm: nuke unneeded ifdefs, forward-delcare struct dentry)
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Cc: Jaya Kumar <jayakumar.lkml@gmail.com>
Acked-by: Antonino Daplas <adaplas@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/video/fb_defio.c')
| -rw-r--r-- | drivers/video/fb_defio.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/video/fb_defio.c b/drivers/video/fb_defio.c index 65f4e6ee7f94..f963f5f59b73 100644 --- a/drivers/video/fb_defio.c +++ b/drivers/video/fb_defio.c @@ -47,6 +47,18 @@ static struct page* fb_deferred_io_nopage(struct vm_area_struct *vma, return page; } +int fb_deferred_io_fsync(struct file *file, struct dentry *dentry, int datasync) +{ + struct fb_info *info = file->private_data; + + /* Kill off the delayed work */ + cancel_rearming_delayed_work(&info->deferred_work); + + /* Run it immediately */ + return schedule_delayed_work(&info->deferred_work, 0); +} +EXPORT_SYMBOL_GPL(fb_deferred_io_fsync); + /* vm_ops->page_mkwrite handler */ static int fb_deferred_io_mkwrite(struct vm_area_struct *vma, struct page *page) |