block/rnbd: Remove a useless mutex
According to lib/idr.c, The IDA handles its own locking. It is safe to call any of the IDA functions without synchronisation in your code. so the 'ida_lock' mutex can just be removed. It is here only to protect some ida_simple_get()/ida_simple_remove() calls. While at it, switch to ida_alloc_XXX()/ida_free() instead to ida_simple_get()/ida_simple_remove(). The latter is deprecated and more verbose. Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Acked-by: Jack Wang <jinpu.wang@ionos.com> Link: https://lore.kernel.org/r/7f9eccd8b1fce1bac45ac9b01a78cf72f54c0a61.1644266862.git.christophe.jaillet@wanadoo.fr Signed-off-by: Jens Axboe <axboe@kernel.dk>
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