From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Fri, 23 Feb 2007 18:22:37 +0900 From: Paul Mundt Subject: Re: [RFC 2.6.20 1/1] fbdev,mm: Deferred IO and hecubafb driver Message-ID: <20070223092237.GA16889@linux-sh.org> References: <20070223063228.GA9906@localhost> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20070223063228.GA9906@localhost> Sender: owner-linux-mm@kvack.org Return-Path: To: Jaya Kumar Cc: linux-fbdev-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org, linux-mm@kvack.org List-ID: On Fri, Feb 23, 2007 at 07:32:28AM +0100, Jaya Kumar wrote: > This is a first pass at abstracting deferred IO out from hecubafb and > into fbdev as was discussed before: > http://marc.theaimsgroup.com/?l=linux-fbdev-devel&m=117187443327466&w=2 > > Please let me know your feedback and if it looks okay so far. > How about this for an fsync()? I wonder if this will be sufficient for msync() based flushing, or whether the ->sync VMA op is needed again.. Signed-off-by: Paul Mundt -- drivers/video/fb_defio.c | 12 ++++++++++++ drivers/video/fbmem.c | 3 +++ include/linux/fb.h | 2 ++ 3 files changed, 17 insertions(+) diff --git a/drivers/video/fb_defio.c b/drivers/video/fb_defio.c index c3e57cc..8a66dc8 100644 --- a/drivers/video/fb_defio.c +++ b/drivers/video/fb_defio.c @@ -52,6 +52,18 @@ static void fb_deferred_io_work(struct work_struct *work) mutex_unlock(&fbdefio->lock); } +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 */ int fb_deferred_io_mkwrite(struct vm_area_struct *vma, struct page *page) diff --git a/drivers/video/fbmem.c b/drivers/video/fbmem.c index 863126a..69bbbe2 100644 --- a/drivers/video/fbmem.c +++ b/drivers/video/fbmem.c @@ -1266,6 +1266,9 @@ static const struct file_operations fb_fops = { #ifdef HAVE_ARCH_FB_UNMAPPED_AREA .get_unmapped_area = get_fb_unmapped_area, #endif +#ifdef CONFIG_FB_DEFERRED_IO + .fsync = fb_deferred_io_fsync, +#endif }; struct class *fb_class; diff --git a/include/linux/fb.h b/include/linux/fb.h index af217dd..3f62652 100644 --- a/include/linux/fb.h +++ b/include/linux/fb.h @@ -933,6 +933,8 @@ extern void fb_deferred_io_init(struct fb_info *info); extern void fb_deferred_io_cleanup(struct fb_info *info); extern int fb_deferred_io_mkwrite(struct vm_area_struct *vma, struct page *page); +extern int fb_deferred_io_fsync(struct file *file, struct dentry *dentry, + int datasync); #else #define fb_deferred_io_init(fb_info) do { } while (0) #define fb_deferred_io_cleanup(fb_info) do { } while (0) -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org