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| author | Jeff Layton <jlayton@redhat.com> | 2008-08-02 08:00:48 -0400 |
|---|---|---|
| committer | Steve French <sfrench@us.ibm.com> | 2008-08-04 02:02:15 +0000 |
| commit | 93d0ec851820688ef5b21a84e7460d3cf405f5c5 (patch) | |
| tree | 280b8e8ba981f77422e63c9223137e3a24ab98f0 /fs/cifs | |
| parent | 66b8bd3c405389213de1d6ba6c2565990f62004f (diff) | |
| download | linux-93d0ec851820688ef5b21a84e7460d3cf405f5c5.tar.gz linux-93d0ec851820688ef5b21a84e7460d3cf405f5c5.tar.bz2 linux-93d0ec851820688ef5b21a84e7460d3cf405f5c5.zip | |
remove locking around tcpSesAllocCount atomic variable
The global tcpSesAllocCount variable is an atomic already and doesn't
really need the extra locking around it. Remove the locking and just use
the atomic_inc_return and atomic_dec_return functions to make sure we
access it correctly.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
Diffstat (limited to 'fs/cifs')
| -rw-r--r-- | fs/cifs/connect.c | 15 |
1 files changed, 6 insertions, 9 deletions
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c index b51d5777cde6..34a1fc9dabf5 100644 --- a/fs/cifs/connect.c +++ b/fs/cifs/connect.c @@ -351,11 +351,9 @@ cifs_demultiplex_thread(struct TCP_Server_Info *server) current->flags |= PF_MEMALLOC; cFYI(1, ("Demultiplex PID: %d", task_pid_nr(current))); - write_lock(&GlobalSMBSeslock); - atomic_inc(&tcpSesAllocCount); - length = tcpSesAllocCount.counter; - write_unlock(&GlobalSMBSeslock); - if (length > 1) + + length = atomic_inc_return(&tcpSesAllocCount); + if (length > 1) mempool_resize(cifs_req_poolp, length + cifs_min_rcv, GFP_KERNEL); @@ -745,14 +743,11 @@ multi_t2_fnd: coming home not much else we can do but free the memory */ } - write_lock(&GlobalSMBSeslock); - atomic_dec(&tcpSesAllocCount); - length = tcpSesAllocCount.counter; - /* last chance to mark ses pointers invalid if there are any pointing to this (e.g if a crazy root user tried to kill cifsd kernel thread explicitly this might happen) */ + write_lock(&GlobalSMBSeslock); list_for_each(tmp, &GlobalSMBSessionList) { ses = list_entry(tmp, struct cifsSesInfo, cifsSessionList); @@ -763,6 +758,8 @@ multi_t2_fnd: kfree(server->hostname); kfree(server); + + length = atomic_dec_return(&tcpSesAllocCount); if (length > 0) mempool_resize(cifs_req_poolp, length + cifs_min_rcv, GFP_KERNEL); |