diff options
Diffstat (limited to 'lib/idr.c')
| -rw-r--r-- | lib/idr.c | 31 |
1 files changed, 16 insertions, 15 deletions
diff --git a/lib/idr.c b/lib/idr.c index 7a02e173f02..8170ace154f 100644 --- a/lib/idr.c +++ b/lib/idr.c @@ -35,7 +35,7 @@ static struct kmem_cache *idr_layer_cache; -static struct idr_layer *alloc_layer(struct idr *idp) +static struct idr_layer *get_from_free_list(struct idr *idp) { struct idr_layer *p; unsigned long flags; @@ -51,14 +51,14 @@ static struct idr_layer *alloc_layer(struct idr *idp) } /* only called when idp->lock is held */ -static void __free_layer(struct idr *idp, struct idr_layer *p) +static void __move_to_free_list(struct idr *idp, struct idr_layer *p) { p->ary[0] = idp->id_free; idp->id_free = p; idp->id_free_cnt++; } -static void free_layer(struct idr *idp, struct idr_layer *p) +static void move_to_free_list(struct idr *idp, struct idr_layer *p) { unsigned long flags; @@ -66,7 +66,7 @@ static void free_layer(struct idr *idp, struct idr_layer *p) * Depends on the return element being zeroed. */ spin_lock_irqsave(&idp->lock, flags); - __free_layer(idp, p); + __move_to_free_list(idp, p); spin_unlock_irqrestore(&idp->lock, flags); } @@ -109,7 +109,7 @@ int idr_pre_get(struct idr *idp, gfp_t gfp_mask) new = kmem_cache_alloc(idr_layer_cache, gfp_mask); if (new == NULL) return (0); - free_layer(idp, new); + move_to_free_list(idp, new); } return 1; } @@ -167,7 +167,8 @@ static int sub_alloc(struct idr *idp, int *starting_id, struct idr_layer **pa) * Create the layer below if it is missing. */ if (!p->ary[m]) { - if (!(new = alloc_layer(idp))) + new = get_from_free_list(idp); + if (!new) return -1; p->ary[m] = new; p->count++; @@ -192,7 +193,7 @@ build_up: p = idp->top; layers = idp->layers; if (unlikely(!p)) { - if (!(p = alloc_layer(idp))) + if (!(p = get_from_free_list(idp))) return -1; layers = 1; } @@ -204,7 +205,7 @@ build_up: layers++; if (!p->count) continue; - if (!(new = alloc_layer(idp))) { + if (!(new = get_from_free_list(idp))) { /* * The allocation failed. If we built part of * the structure tear it down. @@ -214,7 +215,7 @@ build_up: p = p->ary[0]; new->ary[0] = NULL; new->bitmap = new->count = 0; - __free_layer(idp, new); + __move_to_free_list(idp, new); } spin_unlock_irqrestore(&idp->lock, flags); return -1; @@ -351,7 +352,7 @@ static void sub_remove(struct idr *idp, int shift, int id) __clear_bit(n, &p->bitmap); p->ary[n] = NULL; while(*paa && ! --((**paa)->count)){ - free_layer(idp, **paa); + move_to_free_list(idp, **paa); **paa-- = NULL; } if (!*paa) @@ -378,12 +379,12 @@ void idr_remove(struct idr *idp, int id) p = idp->top->ary[0]; idp->top->bitmap = idp->top->count = 0; - free_layer(idp, idp->top); + move_to_free_list(idp, idp->top); idp->top = p; --idp->layers; } while (idp->id_free_cnt >= IDR_FREE_MAX) { - p = alloc_layer(idp); + p = get_from_free_list(idp); kmem_cache_free(idr_layer_cache, p); } return; @@ -426,7 +427,7 @@ void idr_remove_all(struct idr *idp) while (n < fls(id)) { if (p) { memset(p, 0, sizeof *p); - free_layer(idp, p); + move_to_free_list(idp, p); } n += IDR_BITS; p = *--paa; @@ -444,7 +445,7 @@ EXPORT_SYMBOL(idr_remove_all); void idr_destroy(struct idr *idp) { while (idp->id_free_cnt) { - struct idr_layer *p = alloc_layer(idp); + struct idr_layer *p = get_from_free_list(idp); kmem_cache_free(idr_layer_cache, p); } } @@ -749,7 +750,7 @@ int ida_get_new_above(struct ida *ida, int starting_id, int *p_id) * allocation. */ if (ida->idr.id_free_cnt || ida->free_bitmap) { - struct idr_layer *p = alloc_layer(&ida->idr); + struct idr_layer *p = get_from_free_list(&ida->idr); if (p) kmem_cache_free(idr_layer_cache, p); } |