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block: open code create_task_io_context in set_task_ioprio 

The flow in set_task_ioprio can be simplified by simply open coding
create_task_io_context, which removes a refcount roundtrip on the I/O
context.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20211209063131.18537-10-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2021-12-09 07:31:29 +01:00 committed by Jens Axboe
parent 8472161b77
commit 5fc11eebb4
1 changed files with 11 additions and 5 deletions
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16
block/blk-ioc.c
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@ -291,12 +291,18 @@ int set_task_ioprio(struct task_struct *task, int ioprio)
struct io_context *ioc;
task_unlock(task);
ioc = create_task_io_context(task, GFP_ATOMIC, NUMA_NO_NODE);
if (ioc) {
ioc->ioprio = ioprio;
put_io_context(ioc);
ioc = alloc_io_context(GFP_ATOMIC, NUMA_NO_NODE);
if (!ioc)
return -ENOMEM;
task_lock(task);
if (task->io_context || (task->flags & PF_EXITING)) {
kmem_cache_free(iocontext_cachep, ioc);
ioc = task->io_context;
} else {
task->io_context = ioc;
}
return 0;
}
task->io_context->ioprio = ioprio;
task_unlock(task);