io_uring: make fallocate be hashed work

[ Upstream commit 88a80066 ]

Like ftruncate and write, fallocate operations on the same file cannot
be executed in parallel, so it is better to make fallocate be hashed
work.

Signed-off-by: Fengnan Chang <changfengnan@bytedance.com>
Link: https://lore.kernel.org/r/20250623110218.61490-1-changfengnan@bytedance.com


Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>