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| author | Matthew Wilcox <willy@infradead.org> | 2021-06-01 15:30:30 +0100 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2021-06-01 17:38:40 +0200 |
| commit | 0b78f8bcf4951af30b0ae83ea4fad27d641ab617 (patch) | |
| tree | 6545ba613e36b540815717431b9b157b67cbe651 /include | |
| parent | 8124c8a6b35386f73523d27eacb71b5364a68c4c (diff) | |
| download | lwn-0b78f8bcf4951af30b0ae83ea4fad27d641ab617.tar.gz lwn-0b78f8bcf4951af30b0ae83ea4fad27d641ab617.zip | |
Revert "fb_defio: Remove custom address_space_operations"
Commit ccf953d8f3d6 makes framebuffers which use deferred I/O stop
displaying updates after the first one. This is because the pages
handled by fb_defio no longer have a page_mapping(). That prevents
page_mkclean() from marking the PTEs as clean, and so writes are only
noticed the first time.
Reported-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/YLZEhv0cpZp8uVE3@casper.infradead.org
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/fb.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/fb.h b/include/linux/fb.h index a8dccd23c249..ecfbcc0553a5 100644 --- a/include/linux/fb.h +++ b/include/linux/fb.h @@ -659,6 +659,9 @@ static inline void __fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, /* drivers/video/fb_defio.c */ int fb_deferred_io_mmap(struct fb_info *info, struct vm_area_struct *vma); 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, loff_t start, loff_t end, int datasync); |