tree 0963c1d3178da6563c4577263425573cb371dfd6
parent bcd393314a5f7fa01a859db66a02f85a85845c60
author Jens Axboe <axboe@kernel.dk> 1542821559 -0700
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1638949506 +0100

fs: add fget_many() and fput_many()

commit 091141a42e15fe47ada737f3996b317072afcefb upstream.

Some uses cases repeatedly get and put references to the same file, but
the only exposed interface is doing these one at the time. As each of
these entail an atomic inc or dec on a shared structure, that cost can
add up.

Add fget_many(), which works just like fget(), except it takes an
argument for how many references to get on the file. Ditto fput_many(),
which can drop an arbitrary number of references to a file.

Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>