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| author | Christoph Hellwig <hch@lst.de> | 2020-04-25 09:55:51 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2020-04-25 09:44:40 -0600 |
| commit | 3e82c3485e835b4dc7374316357fa388676201d7 (patch) | |
| tree | 2dd8ef2e7e7671ae89034a04c34d9e7ab263729f | |
| parent | 28d65729b050977d8a9125e6726871e83bd22124 (diff) | |
| download | lwn-3e82c3485e835b4dc7374316357fa388676201d7.tar.gz lwn-3e82c3485e835b4dc7374316357fa388676201d7.zip | |
block: remove create_io_context
create_io_context just has a single caller, which also happens to not
even use the return value. Just open code it there.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
| -rw-r--r-- | block/blk-core.c | 11 | ||||
| -rw-r--r-- | block/blk.h | 20 |
2 files changed, 6 insertions, 25 deletions
diff --git a/block/blk-core.c b/block/blk-core.c index 311596d5dbc4..38e984d95e84 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -963,12 +963,13 @@ generic_make_request_checks(struct bio *bio) } /* - * Various block parts want %current->io_context and lazy ioc - * allocation ends up trading a lot of pain for a small amount of - * memory. Just allocate it upfront. This may fail and block - * layer knows how to live with it. + * Various block parts want %current->io_context, so allocate it up + * front rather than dealing with lots of pain to allocate it only + * where needed. This may fail and the block layer knows how to live + * with it. */ - create_io_context(GFP_ATOMIC, q->node); + if (unlikely(!current->io_context)) + create_task_io_context(current, GFP_ATOMIC, q->node); if (!blkcg_bio_issue_check(q, bio)) return false; diff --git a/block/blk.h b/block/blk.h index 204963bb03e8..73bd3b1c6938 100644 --- a/block/blk.h +++ b/block/blk.h @@ -303,26 +303,6 @@ void ioc_clear_queue(struct request_queue *q); int create_task_io_context(struct task_struct *task, gfp_t gfp_mask, int node); -/** - * create_io_context - try to create task->io_context - * @gfp_mask: allocation mask - * @node: allocation node - * - * If %current->io_context is %NULL, allocate a new io_context and install - * it. Returns the current %current->io_context which may be %NULL if - * allocation failed. - * - * Note that this function can't be called with IRQ disabled because - * task_lock which protects %current->io_context is IRQ-unsafe. - */ -static inline struct io_context *create_io_context(gfp_t gfp_mask, int node) -{ - WARN_ON_ONCE(irqs_disabled()); - if (unlikely(!current->io_context)) - create_task_io_context(current, gfp_mask, node); - return current->io_context; -} - /* * Internal throttling interface */ |