diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/cpumask.c | 4 | ||||
| -rw-r--r-- | lib/idr.c | 46 |
2 files changed, 48 insertions, 2 deletions
diff --git a/lib/cpumask.c b/lib/cpumask.c index 3389e2440da0..1f71b97de0f9 100644 --- a/lib/cpumask.c +++ b/lib/cpumask.c @@ -109,10 +109,10 @@ bool alloc_cpumask_var_node(cpumask_var_t *mask, gfp_t flags, int node) #endif /* FIXME: Bandaid to save us from old primitives which go to NR_CPUS. */ if (*mask) { + unsigned char *ptr = (unsigned char *)cpumask_bits(*mask); unsigned int tail; tail = BITS_TO_LONGS(NR_CPUS - nr_cpumask_bits) * sizeof(long); - memset(cpumask_bits(*mask) + cpumask_size() - tail, - 0, tail); + memset(ptr + cpumask_size() - tail, 0, tail); } return *mask != NULL; diff --git a/lib/idr.c b/lib/idr.c index dab4bca86f5d..80ca9aca038b 100644 --- a/lib/idr.c +++ b/lib/idr.c @@ -579,6 +579,52 @@ int idr_for_each(struct idr *idp, EXPORT_SYMBOL(idr_for_each); /** + * idr_get_next - lookup next object of id to given id. + * @idp: idr handle + * @id: pointer to lookup key + * + * Returns pointer to registered object with id, which is next number to + * given id. + */ + +void *idr_get_next(struct idr *idp, int *nextidp) +{ + struct idr_layer *p, *pa[MAX_LEVEL]; + struct idr_layer **paa = &pa[0]; + int id = *nextidp; + int n, max; + + /* find first ent */ + n = idp->layers * IDR_BITS; + max = 1 << n; + p = rcu_dereference(idp->top); + if (!p) + return NULL; + + while (id < max) { + while (n > 0 && p) { + n -= IDR_BITS; + *paa++ = p; + p = rcu_dereference(p->ary[(id >> n) & IDR_MASK]); + } + + if (p) { + *nextidp = id; + return p; + } + + id += 1 << n; + while (n < fls(id)) { + n += IDR_BITS; + p = *--paa; + } + } + return NULL; +} + + + +/** * idr_replace - replace pointer for given id * @idp: idr handle * @ptr: pointer you want associated with the id |