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| author | Tejun Heo <tj@kernel.org> | 2013-02-27 17:03:54 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-02-27 19:10:14 -0800 |
| commit | 3594eb2894f571c9b9a497159b1e4d84fdac5688 (patch) | |
| tree | 471f3da090b7b297b3c35e7901c91c3f5042ef52 | |
| parent | 12d1b4393e0d8df36b2646a5e512f0513fb532d2 (diff) | |
| download | linux-3594eb2894f571c9b9a497159b1e4d84fdac5688.tar.gz linux-3594eb2894f571c9b9a497159b1e4d84fdac5688.tar.bz2 linux-3594eb2894f571c9b9a497159b1e4d84fdac5688.zip | |
idr: refactor idr_get_new_above()
Move slot filling to idr_fill_slot() from idr_get_new_above_int() and
make idr_get_new_above() directly call it. idr_get_new_above_int() is
no longer needed and removed.
This will be used to implement a new ID allocation interface.
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | lib/idr.c | 30 |
1 files changed, 12 insertions, 18 deletions
diff --git a/lib/idr.c b/lib/idr.c index bde6eecb0e87..b13aae5bdc81 100644 --- a/lib/idr.c +++ b/lib/idr.c @@ -278,24 +278,15 @@ build_up: return(v); } -static int idr_get_new_above_int(struct idr *idp, void *ptr, int starting_id) +/* + * @id and @pa are from a successful allocation from idr_get_empty_slot(). + * Install the user pointer @ptr and mark the slot full. + */ +static void idr_fill_slot(void *ptr, int id, struct idr_layer **pa) { - struct idr_layer *pa[MAX_IDR_LEVEL]; - int id; - - id = idr_get_empty_slot(idp, starting_id, pa); - if (id >= 0) { - /* - * Successfully found an empty slot. Install the user - * pointer and mark the slot full. - */ - rcu_assign_pointer(pa[0]->ary[id & IDR_MASK], - (struct idr_layer *)ptr); - pa[0]->count++; - idr_mark_full(pa, id); - } - - return id; + rcu_assign_pointer(pa[0]->ary[id & IDR_MASK], (struct idr_layer *)ptr); + pa[0]->count++; + idr_mark_full(pa, id); } /** @@ -318,11 +309,14 @@ static int idr_get_new_above_int(struct idr *idp, void *ptr, int starting_id) */ int idr_get_new_above(struct idr *idp, void *ptr, int starting_id, int *id) { + struct idr_layer *pa[MAX_IDR_LEVEL]; int rv; - rv = idr_get_new_above_int(idp, ptr, starting_id); + rv = idr_get_empty_slot(idp, starting_id, pa); if (rv < 0) return rv == -ENOMEM ? -EAGAIN : rv; + + idr_fill_slot(ptr, rv, pa); *id = rv; return 0; } |