This is a note to let you know that I've just added the patch titled
dm stats: initialize read-only module parameter
to the 3.12-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
dm-stats-initialize-read-only-module-parameter.patch
and it can be found in the queue-3.12 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 76f5bee5c3b45c617f91243e85547fc8f67bc678 Mon Sep 17 00:00:00 2001
From: Mikulas Patocka <mpatocka@xxxxxxxxxx>
Date: Thu, 5 Dec 2013 17:34:19 -0500
Subject: dm stats: initialize read-only module parameter
From: Mikulas Patocka <mpatocka@xxxxxxxxxx>
commit 76f5bee5c3b45c617f91243e85547fc8f67bc678 upstream.
The module parameter stats_current_allocated_bytes in dm-mod is
read-only. This parameter informs the user about memory
consumption. It is not supposed to be changed by the user.
However, despite being read-only, this parameter can be set on
modprobe or insmod command line:
modprobe dm-mod stats_current_allocated_bytes=12345
The kernel doesn't expect that this variable can be non-zero at module
initialization and if the user sets it, it results in warning.
This patch initializes the variable in the module init routine, so
that user-supplied value is ignored.
Signed-off-by: Mikulas Patocka <mpatocka@xxxxxxxxxx>
Signed-off-by: Mike Snitzer <snitzer@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/md/dm-stats.c | 1 +
1 file changed, 1 insertion(+)
--- a/drivers/md/dm-stats.c
+++ b/drivers/md/dm-stats.c
@@ -964,6 +964,7 @@ int dm_stats_message(struct mapped_devic
int __init dm_statistics_init(void)
{
+ shared_memory_amount = 0;
dm_stat_need_rcu_barrier = 0;
return 0;
}
Patches currently in stable-queue which might be from mpatocka@xxxxxxxxxx are
queue-3.12/dm-table-fail-dm_table_create-on-dm_round_up-overflow.patch
queue-3.12/dm-stats-initialize-read-only-module-parameter.patch
queue-3.12/dm-bufio-initialize-read-only-module-parameters.patch
queue-3.12/dm-snapshot-avoid-snapshot-space-leak-on-crash.patch
queue-3.12/dm-delay-fix-a-possible-deadlock-due-to-shared-workqueue.patch
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