diff options
| author | Tejun Heo <tj@kernel.org> | 2015-06-26 01:01:38 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-06-26 03:00:39 +0300 |
| commit | 369e5a888179f31dcd7cc8e02d695e6481a66075 (patch) | |
| tree | e61b241c00c61d2ee9986a2e3bd66d3df4a29157 | |
| parent | 698cf1c6163a2f2752d2d3e511a26c688f5778f3 (diff) | |
| download | linux-369e5a888179f31dcd7cc8e02d695e6481a66075.tar.xz | |
netconsole: make all dynamic netconsoles share a mutex
Currently, each dynamic netconsole_target uses its own separate mutex to
synchronize the configuration operations.
This patch replaces the per-netconsole_target mutexes with a single
mutex - dynamic_netconsole_mutex. The reduced granularity doesn't hurt
anything, the code is minutely simpler and this'd allow adding
operations which should be synchronized across all dynamic netconsoles.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: David Miller <davem@davemloft.net>
Cc: Kay Sievers <kay@vrfy.org>
Cc: Petr Mladek <pmladek@suse.cz>
Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | drivers/net/netconsole.c | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/drivers/net/netconsole.c b/drivers/net/netconsole.c index 8dd1e554aa16..9b0c81e7c752 100644 --- a/drivers/net/netconsole.c +++ b/drivers/net/netconsole.c @@ -105,13 +105,13 @@ struct netconsole_target { struct config_item item; #endif bool enabled; - struct mutex mutex; struct netpoll np; }; #ifdef CONFIG_NETCONSOLE_DYNAMIC static struct configfs_subsystem netconsole_subsys; +static DEFINE_MUTEX(dynamic_netconsole_mutex); static int __init dynamic_netconsole_init(void) { @@ -185,7 +185,6 @@ static struct netconsole_target *alloc_param_target(char *target_config) strlcpy(nt->np.dev_name, "eth0", IFNAMSIZ); nt->np.local_port = 6665; nt->np.remote_port = 6666; - mutex_init(&nt->mutex); eth_broadcast_addr(nt->np.remote_mac); /* Parse parameters and setup netpoll */ @@ -562,10 +561,10 @@ static ssize_t netconsole_target_attr_store(struct config_item *item, struct netconsole_target_attr *na = container_of(attr, struct netconsole_target_attr, attr); - mutex_lock(&nt->mutex); + mutex_lock(&dynamic_netconsole_mutex); if (na->store) ret = na->store(nt, buf, count); - mutex_unlock(&nt->mutex); + mutex_unlock(&dynamic_netconsole_mutex); return ret; } @@ -604,7 +603,6 @@ static struct config_item *make_netconsole_target(struct config_group *group, strlcpy(nt->np.dev_name, "eth0", IFNAMSIZ); nt->np.local_port = 6665; nt->np.remote_port = 6666; - mutex_init(&nt->mutex); eth_broadcast_addr(nt->np.remote_mac); /* Initialize the config_item member */ |