From c165f25d23ecb2f9f121ced20435415b931219e2 Mon Sep 17 00:00:00 2001 From: Hui Zhu Date: Mon, 23 Sep 2019 15:39:37 -0700 Subject: zpool: add malloc_support_movable to zpool_driver As a zpool_driver, zsmalloc can allocate movable memory because it support migate pages. But zbud and z3fold cannot allocate movable memory. Add malloc_support_movable to zpool_driver. If a zpool_driver support allocate movable memory, set it to true. And add zpool_malloc_support_movable check malloc_support_movable to make sure if a zpool support allocate movable memory. Link: http://lkml.kernel.org/r/20190605100630.13293-1-teawaterz@linux.alibaba.com Signed-off-by: Hui Zhu Reviewed-by: Shakeel Butt Cc: Dan Streetman Cc: Minchan Kim Cc: Nitin Gupta Cc: Sergey Senozhatsky Cc: Seth Jennings Cc: Vitaly Wool Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/zpool.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) (limited to 'mm/zpool.c') diff --git a/mm/zpool.c b/mm/zpool.c index a2dd9107857d..863669212070 100644 --- a/mm/zpool.c +++ b/mm/zpool.c @@ -238,6 +238,22 @@ const char *zpool_get_type(struct zpool *zpool) return zpool->driver->type; } +/** + * zpool_malloc_support_movable() - Check if the zpool support + * allocate movable memory + * @zpool: The zpool to check + * + * This returns if the zpool support allocate movable memory. + * + * Implementations must guarantee this to be thread-safe. + * + * Returns: true if if the zpool support allocate movable memory, false if not + */ +bool zpool_malloc_support_movable(struct zpool *zpool) +{ + return zpool->driver->malloc_support_movable; +} + /** * zpool_malloc() - Allocate memory * @zpool: The zpool to allocate from. -- cgit v1.2.3