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| author | Mikulas Patocka <mpatocka@redhat.com> | 2013-12-05 17:34:19 -0500 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2013-12-10 19:13:21 -0500 |
| commit | 76f5bee5c3b45c617f91243e85547fc8f67bc678 (patch) | |
| tree | ac768fd2a42dad32d090694345cb0bf4277789c2 | |
| parent | 4cb57ab4a2e61978f3a9b7d4f53988f30d61c27f (diff) | |
| download | linux-76f5bee5c3b45c617f91243e85547fc8f67bc678.tar.bz2 | |
dm stats: initialize read-only module parameter
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@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Cc: stable@vger.kernel.org # 3.12+
| -rw-r--r-- | drivers/md/dm-stats.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/md/dm-stats.c b/drivers/md/dm-stats.c index 3d404c1371ed..28a90122a5a8 100644 --- a/drivers/md/dm-stats.c +++ b/drivers/md/dm-stats.c @@ -964,6 +964,7 @@ int dm_stats_message(struct mapped_device *md, unsigned argc, char **argv, int __init dm_statistics_init(void) { + shared_memory_amount = 0; dm_stat_need_rcu_barrier = 0; return 0; } |