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| author |   Shaohua Li <shli@kernel.org> | 2013-10-15 09:05:02 +0800 |
|---|---|---|
| committer |   Jens Axboe <axboe@kernel.dk> | 2013-10-25 11:55:59 +0100 |
| commit | 7fc2ba17e8bf9f218cac10cc2a3de613d9d9086d (patch) | |
| tree | 464baa951977743dc1da2dd1a0f595c50dc3e0a8 /include/linux/percpu_ida.h | |
| parent | percpu_ida: make percpu_ida percpu size/batch configurable (diff) | |
| download | linux-dev-7fc2ba17e8bf9f218cac10cc2a3de613d9d9086d.tar.xz linux-dev-7fc2ba17e8bf9f218cac10cc2a3de613d9d9086d.zip | |
percpu_ida: add percpu_ida_for_each_free
Add a new API to iterate free ids. blk-mq-tag will use it.
Note, this doesn't guarantee to iterate all free ids restrictly. Caller
should be aware of this. blk-mq uses it to do sanity check for request
timedout, so can tolerate the limitation.
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Shaohua Li <shli@fusionio.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include/linux/percpu_ida.h')
| -rw-r--r-- | include/linux/percpu_ida.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/percpu_ida.h b/include/linux/percpu_ida.h index 56c14033e7e7..63510ae6f933 100644 --- a/include/linux/percpu_ida.h +++ b/include/linux/percpu_ida.h @@ -73,4 +73,8 @@ static inline int percpu_ida_init(struct percpu_ida *pool, unsigned long nr_tags IDA_DEFAULT_PCPU_BATCH_MOVE); } +typedef int (*percpu_ida_cb)(unsigned, void *); +int percpu_ida_for_each_free(struct percpu_ida *pool, percpu_ida_cb fn, + void *data); + #endif /* __PERCPU_IDA_H__ */ |