diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/xarray.c | 58 |
1 files changed, 25 insertions, 33 deletions
diff --git a/lib/xarray.c b/lib/xarray.c index b55aa8c1c20f..a9d28013f9dc 100644 --- a/lib/xarray.c +++ b/lib/xarray.c @@ -1361,23 +1361,21 @@ void *xa_erase(struct xarray *xa, unsigned long index) EXPORT_SYMBOL(xa_erase); /** - * xa_store() - Store this entry in the XArray. + * __xa_store() - Store this entry in the XArray. * @xa: XArray. * @index: Index into array. * @entry: New entry. * @gfp: Memory allocation flags. * - * After this function returns, loads from this index will return @entry. - * Storing into an existing multislot entry updates the entry of every index. - * The marks associated with @index are unaffected unless @entry is %NULL. + * You must already be holding the xa_lock when calling this function. + * It will drop the lock if needed to allocate memory, and then reacquire + * it afterwards. * - * Context: Process context. Takes and releases the xa_lock. May sleep - * if the @gfp flags permit. - * Return: The old entry at this index on success, xa_err(-EINVAL) if @entry - * cannot be stored in an XArray, or xa_err(-ENOMEM) if memory allocation - * failed. + * Context: Any context. Expects xa_lock to be held on entry. May + * release and reacquire xa_lock if @gfp flags permit. + * Return: The old entry at this index or xa_err() if an error happened. */ -void *xa_store(struct xarray *xa, unsigned long index, void *entry, gfp_t gfp) +void *__xa_store(struct xarray *xa, unsigned long index, void *entry, gfp_t gfp) { XA_STATE(xas, xa, index); void *curr; @@ -1386,49 +1384,43 @@ void *xa_store(struct xarray *xa, unsigned long index, void *entry, gfp_t gfp) return XA_ERROR(-EINVAL); do { - xas_lock(&xas); curr = xas_store(&xas, entry); if (xa_track_free(xa) && entry) xas_clear_mark(&xas, XA_FREE_MARK); - xas_unlock(&xas); - } while (xas_nomem(&xas, gfp)); + } while (__xas_nomem(&xas, gfp)); return xas_result(&xas, curr); } -EXPORT_SYMBOL(xa_store); +EXPORT_SYMBOL(__xa_store); /** - * __xa_store() - Store this entry in the XArray. + * xa_store() - Store this entry in the XArray. * @xa: XArray. * @index: Index into array. * @entry: New entry. * @gfp: Memory allocation flags. * - * You must already be holding the xa_lock when calling this function. - * It will drop the lock if needed to allocate memory, and then reacquire - * it afterwards. + * After this function returns, loads from this index will return @entry. + * Storing into an existing multislot entry updates the entry of every index. + * The marks associated with @index are unaffected unless @entry is %NULL. * - * Context: Any context. Expects xa_lock to be held on entry. May - * release and reacquire xa_lock if @gfp flags permit. - * Return: The old entry at this index or xa_err() if an error happened. + * Context: Any context. Takes and releases the xa_lock. + * May sleep if the @gfp flags permit. + * Return: The old entry at this index on success, xa_err(-EINVAL) if @entry + * cannot be stored in an XArray, or xa_err(-ENOMEM) if memory allocation + * failed. */ -void *__xa_store(struct xarray *xa, unsigned long index, void *entry, gfp_t gfp) +void *xa_store(struct xarray *xa, unsigned long index, void *entry, gfp_t gfp) { - XA_STATE(xas, xa, index); void *curr; - if (WARN_ON_ONCE(xa_is_internal(entry))) - return XA_ERROR(-EINVAL); - - do { - curr = xas_store(&xas, entry); - if (xa_track_free(xa) && entry) - xas_clear_mark(&xas, XA_FREE_MARK); - } while (__xas_nomem(&xas, gfp)); + xa_lock(xa); + curr = __xa_store(xa, index, entry, gfp); + xa_unlock(xa); - return xas_result(&xas, curr); + return curr; } -EXPORT_SYMBOL(__xa_store); +EXPORT_SYMBOL(xa_store); /** * __xa_cmpxchg() - Store this entry in the XArray. |
