diff options
Diffstat (limited to 'drivers/md/persistent-data/dm-array.h')
| -rw-r--r-- | drivers/md/persistent-data/dm-array.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/md/persistent-data/dm-array.h b/drivers/md/persistent-data/dm-array.h index ea177d6fa58f..45ea3f6e1ded 100644 --- a/drivers/md/persistent-data/dm-array.h +++ b/drivers/md/persistent-data/dm-array.h @@ -112,6 +112,25 @@ int dm_array_resize(struct dm_array_info *info, dm_block_t root, __dm_written_to_disk(value); /* + * Creates a new array populated with values provided by a callback + * function. This is more efficient than creating an empty array, + * resizing, and then setting values since that process incurs a lot of + * copying. + * + * Assumes 32bit values for now since it's only used by the cache hint + * array. + * + * info - describes the array + * root - the root block of the array on disk + * size - the number of entries in the array + * fn - the callback + * context - passed to the callback + */ +typedef int (*value_fn)(uint32_t index, void *value_le, void *context); +int dm_array_new(struct dm_array_info *info, dm_block_t *root, + uint32_t size, value_fn fn, void *context); + +/* * Frees a whole array. The value_type's decrement operation will be called * for all values in the array */ |