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authorShaohua Li <shli@kernel.org>2013-10-15 09:05:02 +0800
committerJens Axboe <axboe@kernel.dk>2013-10-25 11:55:59 +0100
commit7fc2ba17e8bf9f218cac10cc2a3de613d9d9086d (patch)
tree464baa951977743dc1da2dd1a0f595c50dc3e0a8 /include/linux/percpu_ida.h
parente26b53d0b287056646a0dffce8bc6b0f053f3823 (diff)
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.h4
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__ */