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| author | Andreas Gruenbacher <agruen@linbit.com> | 2011-08-08 23:36:56 +0200 |
|---|---|---|
| committer | Philipp Reisner <philipp.reisner@linbit.com> | 2014-02-17 16:27:47 +0100 |
| commit | 05f7a7d6a7d23a877063857cf2df1dffec5a96dc (patch) | |
| tree | 680e8b69e8ca9c6e8e793b226eb5392241bbec8d | |
| parent | 8e2294343017d6b9a3026538e58ffe0d8bda3843 (diff) | |
| download | lwn-05f7a7d6a7d23a877063857cf2df1dffec5a96dc.tar.gz lwn-05f7a7d6a7d23a877063857cf2df1dffec5a96dc.zip | |
idr: Add new function idr_is_empty()
Signed-off-by: Andreas Gruenbacher <agruen@linbit.com>
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
| -rw-r--r-- | include/linux/idr.h | 1 | ||||
| -rw-r--r-- | lib/idr.c | 10 |
2 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/idr.h b/include/linux/idr.h index 871a213a8477..9c95d210458b 100644 --- a/include/linux/idr.h +++ b/include/linux/idr.h @@ -85,6 +85,7 @@ void idr_remove(struct idr *idp, int id); void idr_free(struct idr *idp, int id); void idr_destroy(struct idr *idp); void idr_init(struct idr *idp); +bool idr_is_empty(struct idr *idp); /** * idr_preload_end - end preload section started with idr_preload() diff --git a/lib/idr.c b/lib/idr.c index bfe4db4e165f..1ba4956bfbff 100644 --- a/lib/idr.c +++ b/lib/idr.c @@ -869,6 +869,16 @@ void idr_init(struct idr *idp) } EXPORT_SYMBOL(idr_init); +static int idr_has_entry(int id, void *p, void *data) +{ + return 1; +} + +bool idr_is_empty(struct idr *idp) +{ + return !idr_for_each(idp, idr_has_entry, NULL); +} +EXPORT_SYMBOL(idr_is_empty); /** * DOC: IDA description |