UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

btrfs: support subpage in btrfs_clone_extent_buffer 

For btrfs_clone_extent_buffer(), it's mostly the same code of
__alloc_dummy_extent_buffer(), except it has extra page copy.

So to make it subpage compatible, we only need to:

- Call set_extent_buffer_uptodate() instead of SetPageUptodate()
  This will set correct uptodate bit for subpage and regular sector size
  cases.

Since we're calling set_extent_buffer_uptodate() which will also set
EXTENT_BUFFER_UPTODATE bit, we don't need to manually set that bit
either.

Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Qu Wenruo 2021-01-26 16:33:55 +08:00 committed by David Sterba
parent 251f2acc71
commit 92d83e9436
1 changed files with 1 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
fs/btrfs/extent_io.c
View File

@ -5163,11 +5163,10 @@ struct extent_buffer *btrfs_clone_extent_buffer(const struct extent_buffer *src)
return NULL; return NULL;
} }
WARN_ON(PageDirty(p)); WARN_ON(PageDirty(p));
SetPageUptodate(p);
new->pages[i] = p; new->pages[i] = p;
copy_page(page_address(p), page_address(src->pages[i])); copy_page(page_address(p), page_address(src->pages[i]));
} }
set_bit(EXTENT_BUFFER_UPTODATE, &new->bflags); set_extent_buffer_uptodate(new);
return new; return new;
} }