diff options
| -rw-r--r-- | drivers/video/fb_defio.c | 19 | ||||
| -rw-r--r-- | drivers/video/fbmem.c | 4 | ||||
| -rw-r--r-- | include/linux/fb.h | 3 |
3 files changed, 26 insertions, 0 deletions
diff --git a/drivers/video/fb_defio.c b/drivers/video/fb_defio.c index 59df132cc37..4835bdc4e9f 100644 --- a/drivers/video/fb_defio.c +++ b/drivers/video/fb_defio.c @@ -114,6 +114,17 @@ static struct vm_operations_struct fb_deferred_io_vm_ops = { .page_mkwrite = fb_deferred_io_mkwrite, }; +static int fb_deferred_io_set_page_dirty(struct page *page) +{ + if (!PageDirty(page)) + SetPageDirty(page); + return 0; +} + +static const struct address_space_operations fb_deferred_io_aops = { + .set_page_dirty = fb_deferred_io_set_page_dirty, +}; + static int fb_deferred_io_mmap(struct fb_info *info, struct vm_area_struct *vma) { vma->vm_ops = &fb_deferred_io_vm_ops; @@ -163,6 +174,14 @@ void fb_deferred_io_init(struct fb_info *info) } EXPORT_SYMBOL_GPL(fb_deferred_io_init); +void fb_deferred_io_open(struct fb_info *info, + struct inode *inode, + struct file *file) +{ + file->f_mapping->a_ops = &fb_deferred_io_aops; +} +EXPORT_SYMBOL_GPL(fb_deferred_io_open); + void fb_deferred_io_cleanup(struct fb_info *info) { void *screen_base = (void __force *) info->screen_base; diff --git a/drivers/video/fbmem.c b/drivers/video/fbmem.c index 6b487801eea..98843c2ecf7 100644 --- a/drivers/video/fbmem.c +++ b/drivers/video/fbmem.c @@ -1344,6 +1344,10 @@ fb_open(struct inode *inode, struct file *file) if (res) module_put(info->fbops->owner); } +#ifdef CONFIG_FB_DEFERRED_IO + if (info->fbdefio) + fb_deferred_io_open(info, inode, file); +#endif out: unlock_kernel(); return res; diff --git a/include/linux/fb.h b/include/linux/fb.h index 3b8870e32af..531ccd5f596 100644 --- a/include/linux/fb.h +++ b/include/linux/fb.h @@ -976,6 +976,9 @@ static inline void __fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, /* drivers/video/fb_defio.c */ extern void fb_deferred_io_init(struct fb_info *info); +extern void fb_deferred_io_open(struct fb_info *info, + struct inode *inode, + struct file *file); extern void fb_deferred_io_cleanup(struct fb_info *info); extern int fb_deferred_io_fsync(struct file *file, struct dentry *dentry, int datasync); |