From ef13a262c339544a81e3ba8d15ee345641593da4 Mon Sep 17 00:00:00 2001 From: Ying Xue Date: Mon, 21 Apr 2014 10:55:42 +0800 Subject: [PATCH] tipc: replace config_mutex lock with RTNL lock There have two paths where we can configure or change bearer status: one is that bearer is configured from user space with tipc-config tool; another one is that bearer is changed by notification events from its attached interface. On the first path, one dedicated config_mutex lock is guarded; on the latter path, RTNL lock has been placed to serialize the process of dealing with interface events. So, if RTNL lock is also used to protect the first path, this will not only extremely help us simplify current locking policy, but also config_mutex lock can be deleted as well. Signed-off-by: Ying Xue Reviewed-by: Jon Maloy Reviewed-by: Erik Hugne Tested-by: Erik Hugne Signed-off-by: David S. Miller --- net/tipc/config.c | 6 ++---- net/tipc/core.h | 2 +- 2 files changed, 3 insertions(+), 5 deletions(-) diff --git a/net/tipc/config.c b/net/tipc/config.c index 4b981c053823..251f5a2028e4 100644 --- a/net/tipc/config.c +++ b/net/tipc/config.c @@ -42,8 +42,6 @@ #define REPLY_TRUNCATED "\n" -static DEFINE_MUTEX(config_mutex); - static const void *req_tlv_area; /* request message TLV area */ static int req_tlv_space; /* request message TLV area size */ static int rep_headroom; /* reply message headroom to use */ @@ -223,7 +221,7 @@ struct sk_buff *tipc_cfg_do_cmd(u32 orig_node, u16 cmd, const void *request_area { struct sk_buff *rep_tlv_buf; - mutex_lock(&config_mutex); + rtnl_lock(); /* Save request and reply details in a well-known location */ req_tlv_area = request_area; @@ -337,6 +335,6 @@ struct sk_buff *tipc_cfg_do_cmd(u32 orig_node, u16 cmd, const void *request_area /* Return reply buffer */ exit: - mutex_unlock(&config_mutex); + rtnl_unlock(); return rep_tlv_buf; } diff --git a/net/tipc/core.h b/net/tipc/core.h index 8985bbcb942b..36cbf158845f 100644 --- a/net/tipc/core.h +++ b/net/tipc/core.h @@ -56,7 +56,7 @@ #include #include #include - +#include #define TIPC_MOD_VER "2.0.0" -- GitLab