X-Git-Url: http://git.osdn.net/view?a=blobdiff_plain;f=mm%2Fzswap.c;h=2d5727baed5988c23ca4252a601ebaf734820b04;hb=0890a264794f33df540fbaf274699146903b4e6b;hp=4249e82ff934d9fec506fcc7db56d57d48efaf9c;hpb=95872b49ce14169a1ce0dfaac62e284cbdc6eea8;p=uclinux-h8%2Flinux.git

diff --git a/mm/zswap.c b/mm/zswap.c
index 4249e82ff934..2d5727baed59 100644
--- a/mm/zswap.c
+++ b/mm/zswap.c
@@ -75,9 +75,10 @@ static u64 zswap_duplicate_entry;
 /*********************************
 * tunables
 **********************************/
-/* Enable/disable zswap (disabled by default, fixed at boot for now) */
-static bool zswap_enabled __read_mostly;
-module_param_named(enabled, zswap_enabled, bool, 0444);
+
+/* Enable/disable zswap (disabled by default) */
+static bool zswap_enabled;
+module_param_named(enabled, zswap_enabled, bool, 0644);
 
 /* Compressor to be used by zswap (fixed at boot for now) */
 #define ZSWAP_COMPRESSOR_DEFAULT "lzo"
@@ -648,7 +649,7 @@ static int zswap_frontswap_store(unsigned type, pgoff_t offset,
 	u8 *src, *dst;
 	struct zswap_header *zhdr;
 
-	if (!tree) {
+	if (!zswap_enabled || !tree) {
 		ret = -ENODEV;
 		goto reject;
 	}
@@ -901,9 +902,6 @@ static int __init init_zswap(void)
 {
 	gfp_t gfp = __GFP_NORETRY | __GFP_NOWARN;
 
-	if (!zswap_enabled)
-		return 0;
-
 	pr_info("loading zswap\n");
 
 	zswap_pool = zpool_create_pool(zswap_zpool_type, "zswap", gfp,