diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c index 95195863bdbf..cf7d12db3061 100644 --- a/mm/zsmalloc.c +++ b/mm/zsmalloc.c @@ -93,6 +93,7 @@ #include #include #include +#include /* * This must be power of 2 and greater than of equal to sizeof(link_free). @@ -241,6 +242,82 @@ struct mapping_area { enum zs_mapmode vm_mm; /* mapping mode */ }; +/* zpool driver */ + +#ifdef CONFIG_ZPOOL + +static void *zs_zpool_create(gfp_t gfp, struct zpool_ops *zpool_ops) +{ + return zs_create_pool(gfp); +} + +static void zs_zpool_destroy(void *pool) +{ + zs_destroy_pool(pool); +} + +static int zs_zpool_malloc(void *pool, size_t size, gfp_t gfp, + unsigned long *handle) +{ + *handle = zs_malloc(pool, size); + return *handle ? 0 : -1; +} +static void zs_zpool_free(void *pool, unsigned long handle) +{ + zs_free(pool, handle); +} + +static int zs_zpool_shrink(void *pool, unsigned int pages, + unsigned int *reclaimed) +{ + return -EINVAL; +} + +static void *zs_zpool_map(void *pool, unsigned long handle, + enum zpool_mapmode mm) +{ + enum zs_mapmode zs_mm; + + switch (mm) { + case ZPOOL_MM_RO: + zs_mm = ZS_MM_RO; + break; + case ZPOOL_MM_WO: + zs_mm = ZS_MM_WO; + break; + case ZPOOL_MM_RW: /* fallthru */ + default: + zs_mm = ZS_MM_RW; + break; + } + + return zs_map_object(pool, handle, zs_mm); +} +static void zs_zpool_unmap(void *pool, unsigned long handle) +{ + zs_unmap_object(pool, handle); +} + +static u64 zs_zpool_total_size(void *pool) +{ + return zs_get_total_size_bytes(pool); +} + +static struct zpool_driver zs_zpool_driver = { + .type = "zsmalloc", + .owner = THIS_MODULE, + .create = zs_zpool_create, + .destroy = zs_zpool_destroy, + .malloc = zs_zpool_malloc, + .free = zs_zpool_free, + .shrink = zs_zpool_shrink, + .map = zs_zpool_map, + .unmap = zs_zpool_unmap, + .total_size = zs_zpool_total_size, +}; + +#endif /* CONFIG_ZPOOL */ + /* per-cpu VM mapping areas for zspage accesses that cross page boundaries */ static DEFINE_PER_CPU(struct mapping_area, zs_map_area); @@ -814,6 +891,10 @@ static void zs_exit(void) { int cpu; +#ifdef CONFIG_ZPOOL + zpool_unregister_driver(&zs_zpool_driver); +#endif + cpu_notifier_register_begin(); for_each_online_cpu(cpu) @@ -840,6 +921,10 @@ static int zs_init(void) cpu_notifier_register_done(); +#ifdef CONFIG_ZPOOL + zpool_register_driver(&zs_zpool_driver); +#endif + return 0; fail: zs_exit();