mm/truncate: bail out early from invalidate_inode_pages2_range() if mapping is empty

If mapping is empty (both ->nrpages and ->nrexceptional is zero) we can
avoid pointless lookups in empty radix tree and bail out immediately
after cleancache invalidation.

Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Andrey Ryabinin <[email protected]>
Reviewed-by: Jan Kara <[email protected]>
Acked-by: Konrad Rzeszutek Wilk <[email protected]>
Cc: Alexander Viro <[email protected]>
Cc: Ross Zwisler <[email protected]>
Cc: Jens Axboe <[email protected]>
Cc: Johannes Weiner <[email protected]>
Cc: Alexey Kuznetsov <[email protected]>
Cc: Christoph Hellwig <[email protected]>
Cc: Nikolay Borisov <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

0 files changed, 0 insertions, 0 deletions