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brd: remove unused brd_mutex
Remove unused mutex brd_mutex. It is unused since the commit ff26956875
("brd: remove support for BLKFLSBUF").
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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@ -60,7 +60,6 @@ struct brd_device {
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/*
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* Look up and return a brd's page for a given sector.
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*/
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static DEFINE_MUTEX(brd_mutex);
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static struct page *brd_lookup_page(struct brd_device *brd, sector_t sector)
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{
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pgoff_t idx;
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