btrfs: assert page mapping lock in attach_extent_buffer_page

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When calling attach_extent_buffer_page(), either we're attaching
anonymous pages, called from btrfs_clone_extent_buffer(),
or we're attaching btree inode pages, called from alloc_extent_buffer().

For the latter case, we should hold page->mapping->private_lock to avoid
parallel changes to page->private.

Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

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Qu Wenruo 2020-10-21 14:25:02 +08:00 • committed by David Sterba

parent bbb86a3717

commit 0d01e247a0

1 changed files with 9 additions and 0 deletions

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fs/btrfs/extent_io.c

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