linux-kernel - [PATCH] mm/zswap: change params from hidden to ro

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Message-Id: <1384965522-5788-1-git-send-email-ddstreet@ieee.org>
Date:	Wed, 20 Nov 2013 11:38:42 -0500
From:	Dan Streetman <ddstreet@...e.org>
To:	linux-mm@...ck.org, Seth Jennings <sjennings@...iantweb.net>
Cc:	Dan Streetman <ddstreet@...e.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Bob Liu <bob.liu@...cle.com>, Minchan Kim <minchan@...nel.org>,
	Weijie Yang <weijie.yang@...sung.com>
Subject: [PATCH] mm/zswap: change params from hidden to ro

The "compressor" and "enabled" params are currently hidden,
this changes them to read-only, so userspace can tell if
zswap is enabled or not and see what compressor is in use.

Signed-off-by: Dan Streetman <ddstreet@...e.org>
---
 mm/zswap.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mm/zswap.c b/mm/zswap.c
index d93510c..36b268b 100644
--- a/mm/zswap.c
+++ b/mm/zswap.c
@@ -77,12 +77,12 @@ static u64 zswap_duplicate_entry;
 **********************************/
 /* Enable/disable zswap (disabled by default, fixed at boot for now) */
 static bool zswap_enabled __read_mostly;
-module_param_named(enabled, zswap_enabled, bool, 0);
+module_param_named(enabled, zswap_enabled, bool, 0444);
 
 /* Compressor to be used by zswap (fixed at boot for now) */
 #define ZSWAP_COMPRESSOR_DEFAULT "lzo"
 static char *zswap_compressor = ZSWAP_COMPRESSOR_DEFAULT;
-module_param_named(compressor, zswap_compressor, charp, 0);
+module_param_named(compressor, zswap_compressor, charp, 0444);
 
 /* The maximum percentage of memory that the compressed pool can occupy */
 static unsigned int zswap_max_pool_percent = 20;
-- 
1.8.3.1

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