From 5e841b88d23d0ea0a6ee4e76c489899d4d23ce25 Mon Sep 17 00:00:00 2001 From: Paul Mundt Date: Tue, 8 May 2007 00:37:41 -0700 Subject: 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 Cc: Jaya Kumar Acked-by: Antonino Daplas Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/video/fb_defio.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'drivers/video/fb_defio.c') 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) -- cgit v1.2.3