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authorPeter Zijlstra <a.p.zijlstra@chello.nl>2006-12-06 20:35:24 -0800
committerLinus Torvalds <torvalds@woody.osdl.org>2006-12-07 08:39:30 -0800
commited07536ed6731775219c1df7fa26a7588753e693 (patch)
treec539d80fe50f28d4e294850bb33be810f46fd515 /include/net/sock.h
parentb9d85b08c689dbf54b9943a02f73cb54c2b0fccf (diff)
[PATCH] lockdep: annotate nfs/nfsd in-kernel sockets
Stick NFS sockets in their own class to avoid some lockdep warnings. NFS sockets are never exposed to user-space, and will hence not trigger certain code paths that would otherwise pose deadlock scenarios. [akpm@osdl.org: cleanups] Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Steven Dickson <SteveD@redhat.com> Acked-by: Ingo Molnar <mingo@elte.hu> Cc: Trond Myklebust <trond.myklebust@fys.uio.no> Acked-by: Neil Brown <neilb@suse.de> Cc: "David S. Miller" <davem@davemloft.net> Signed-off-by: Andrew Morton <akpm@osdl.org> [ Fixed patch corruption by quilt, pointed out by Peter Zijlstra ] Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/net/sock.h')
-rw-r--r--include/net/sock.h19
1 files changed, 19 insertions, 0 deletions
diff --git a/include/net/sock.h b/include/net/sock.h
index 730899ce516..03684e702d1 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -746,6 +746,25 @@ static inline int sk_stream_wmem_schedule(struct sock *sk, int size)
*/
#define sock_owned_by_user(sk) ((sk)->sk_lock.owner)
+/*
+ * Macro so as to not evaluate some arguments when
+ * lockdep is not enabled.
+ *
+ * Mark both the sk_lock and the sk_lock.slock as a
+ * per-address-family lock class.
+ */
+#define sock_lock_init_class_and_name(sk, sname, skey, name, key) \
+do { \
+ sk->sk_lock.owner = NULL; \
+ init_waitqueue_head(&sk->sk_lock.wq); \
+ spin_lock_init(&(sk)->sk_lock.slock); \
+ debug_check_no_locks_freed((void *)&(sk)->sk_lock, \
+ sizeof((sk)->sk_lock)); \
+ lockdep_set_class_and_name(&(sk)->sk_lock.slock, \
+ (skey), (sname)); \
+ lockdep_init_map(&(sk)->sk_lock.dep_map, (name), (key), 0); \
+} while (0)
+
extern void FASTCALL(lock_sock_nested(struct sock *sk, int subclass));
static inline void lock_sock(struct sock *sk)