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authorMatthew Wilcox <willy@infradead.org>2021-06-01 15:30:30 +0100
committerDaniel Vetter <daniel.vetter@ffwll.ch>2021-06-01 17:38:40 +0200
commit0b78f8bcf4951af30b0ae83ea4fad27d641ab617 (patch)
tree6545ba613e36b540815717431b9b157b67cbe651 /include
parent8124c8a6b35386f73523d27eacb71b5364a68c4c (diff)
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.h3
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);