btrfs: Use ihold instead of igrab in cow_file_range_async
ihold is supposed to be used when the caller already has a reference to the inode. In the case of cow_file_range_async this invariants holds, since the 3 call chains leading to this function all take a reference: btrfs_writepage <--- does igrab extent_write_full_page __extent_writepage writepage_delalloc btrfs_run_delalloc_range cow_file_range_async extent_write_cache_pages <--- does igrab __extent_writepage (same callchain as above) and submit_compressed_extents <-- already called from async CoW submit path, which would have done ihold. extent_write_locked_range __extent_writepage Signed-off-by:Nikolay Borisov <nborisov@suse.com> Reviewed-by:
David Sterba <dsterba@suse.com> [ add comment ] Signed-off-by:
David Sterba <dsterba@suse.com>
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62b37622
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