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| author | Ingo Molnar <mingo@elte.hu> | 2006-07-03 00:25:12 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-07-03 15:27:07 -0700 |
| commit | da21f24dd73954c2ed0cd39a698e2c9916c05d71 (patch) | |
| tree | 22829e3791f0602d284b8f5398526b228faa9501 | |
| parent | 543655244866b8ec648fea1eb9c32a35ffba5721 (diff) | |
| download | linux-da21f24dd73954c2ed0cd39a698e2c9916c05d71.tar.gz linux-da21f24dd73954c2ed0cd39a698e2c9916c05d71.tar.bz2 linux-da21f24dd73954c2ed0cd39a698e2c9916c05d71.zip | |
[PATCH] lockdep: annotate sock_lock_init()
Teach special (multi-initialized, per-address-family) locking code to the lock
validator. Has no effect on non-lockdep kernels.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | include/net/sock.h | 4 | ||||
| -rw-r--r-- | net/core/sock.c | 16 |
2 files changed, 20 insertions, 0 deletions
diff --git a/include/net/sock.h b/include/net/sock.h index 7b3d6b856946..83805feea880 100644 --- a/include/net/sock.h +++ b/include/net/sock.h @@ -80,8 +80,12 @@ typedef struct { wait_queue_head_t wq; } socket_lock_t; +extern struct lock_class_key af_family_keys[AF_MAX]; + #define sock_lock_init(__sk) \ do { spin_lock_init(&((__sk)->sk_lock.slock)); \ + lockdep_set_class(&(__sk)->sk_lock.slock, \ + af_family_keys + (__sk)->sk_family); \ (__sk)->sk_lock.owner = NULL; \ init_waitqueue_head(&((__sk)->sk_lock.wq)); \ } while(0) diff --git a/net/core/sock.c b/net/core/sock.c index 533b9317144b..0b4d5d25b23c 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -129,6 +129,18 @@ #include <net/tcp.h> #endif +/* + * Each address family might have different locking rules, so we have + * one slock key per address family: + */ +struct lock_class_key af_family_keys[AF_MAX]; + +/* + * sk_callback_lock locking rules are per-address-family, + * so split the lock classes by using a per-AF key: + */ +static struct lock_class_key af_callback_keys[AF_MAX]; + /* Take into consideration the size of the struct sk_buff overhead in the * determination of these values, since that is non-constant across * platforms. This makes socket queueing behavior and performance @@ -848,6 +860,8 @@ struct sock *sk_clone(const struct sock *sk, const gfp_t priority) rwlock_init(&newsk->sk_dst_lock); rwlock_init(&newsk->sk_callback_lock); + lockdep_set_class(&newsk->sk_callback_lock, + af_callback_keys + newsk->sk_family); newsk->sk_dst_cache = NULL; newsk->sk_wmem_queued = 0; @@ -1422,6 +1436,8 @@ void sock_init_data(struct socket *sock, struct sock *sk) rwlock_init(&sk->sk_dst_lock); rwlock_init(&sk->sk_callback_lock); + lockdep_set_class(&sk->sk_callback_lock, + af_callback_keys + sk->sk_family); sk->sk_state_change = sock_def_wakeup; sk->sk_data_ready = sock_def_readable; |