diff options
Diffstat (limited to 'lib/idr.c')
| -rw-r--r-- | lib/idr.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/lib/idr.c b/lib/idr.c index d226259c3c28..de19030a999b 100644 --- a/lib/idr.c +++ b/lib/idr.c @@ -48,15 +48,21 @@ static struct idr_layer *alloc_layer(struct idr *idp) return(p); } +/* only called when idp->lock is held */ +static void __free_layer(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) { /* * Depends on the return element being zeroed. */ spin_lock(&idp->lock); - p->ary[0] = idp->id_free; - idp->id_free = p; - idp->id_free_cnt++; + __free_layer(idp, p); spin_unlock(&idp->lock); } @@ -184,12 +190,14 @@ build_up: * The allocation failed. If we built part of * the structure tear it down. */ + spin_lock(&idp->lock); for (new = p; p && p != idp->top; new = p) { p = p->ary[0]; new->ary[0] = NULL; new->bitmap = new->count = 0; - free_layer(idp, new); + __free_layer(idp, new); } + spin_unlock(&idp->lock); return -1; } new->ary[0] = p; |