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[NET]: Change type of owner in sock_lock_t to int, rename 

The type of owner in sock_lock_t is currently (struct sock_iocb *),
presumably for historical reasons.  It is never used as this type, only
tested as NULL or set to (void *)1.  For clarity, this changes it to type
int, and renames to owned, to avoid any possible type casting errors.

Signed-off-by: John Heffner <jheffner@psc.edu>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
John Heffner 2007-09-12 10:44:19 +02:00 committed by David S. Miller
parent 02b3d34631
commit d2e9117c7a
2 changed files with 6 additions and 7 deletions
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7
include/net/sock.h
View File

@ -76,10 +76,9 @@
* between user contexts and software interrupt processing, whereas the
* mini-semaphore synchronizes multiple users amongst themselves.
*/
struct sock_iocb;
typedef struct {
spinlock_t slock;
struct sock_iocb *owner;
int owned;
wait_queue_head_t wq;
/*
* We express the mutex-alike socket_lock semantics
@ -737,7 +736,7 @@ static inline int sk_stream_wmem_schedule(struct sock *sk, int size)
* Since ~2.3.5 it is also exclusive sleep lock serializing
* accesses from user process context.
*/
#define sock_owned_by_user(sk) ((sk)->sk_lock.owner)
#define sock_owned_by_user(sk) ((sk)->sk_lock.owned)
/*
* Macro so as to not evaluate some arguments when
@ -748,7 +747,7 @@ static inline int sk_stream_wmem_schedule(struct sock *sk, int size)
*/
#define sock_lock_init_class_and_name(sk, sname, skey, name, key) \
do { \
sk->sk_lock.owner = NULL; \
sk->sk_lock.owned = 0; \
init_waitqueue_head(&sk->sk_lock.wq); \
spin_lock_init(&(sk)->sk_lock.slock); \
debug_check_no_locks_freed((void *)&(sk)->sk_lock, \

6
net/core/sock.c
View File

@ -1585,9 +1585,9 @@ void fastcall lock_sock_nested(struct sock *sk, int subclass)
{
might_sleep();
spin_lock_bh(&sk->sk_lock.slock);
if (sk->sk_lock.owner)
if (sk->sk_lock.owned)
__lock_sock(sk);
sk->sk_lock.owner = (void *)1;
sk->sk_lock.owned = 1;
spin_unlock(&sk->sk_lock.slock);
/*
* The sk_lock has mutex_lock() semantics here:
@ -1608,7 +1608,7 @@ void fastcall release_sock(struct sock *sk)
spin_lock_bh(&sk->sk_lock.slock);
if (sk->sk_backlog.tail)
__release_sock(sk);
sk->sk_lock.owner = NULL;
sk->sk_lock.owned = 0;
if (waitqueue_active(&sk->sk_lock.wq))
wake_up(&sk->sk_lock.wq);
spin_unlock_bh(&sk->sk_lock.slock);