Commit bc830525 authored by Yajun Deng's avatar Yajun Deng Committed by Jakub Kicinski
Browse files

net: netlink: Remove unused function 



lockdep_genl_is_held() and its caller arm not used now, just remove them.

Signed-off-by: default avatarYajun Deng <yajun.deng@linux.dev>
Link: https://lore.kernel.org/r/20210729074854.8968-1-yajun.deng@linux.dev


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 373a1f2b

include/linux/genetlink.h

+0 −23
Original line number Diff line number Diff line
@@ -8,34 +8,11 @@ 
/* All generic netlink requests are serialized by a global lock.  */

extern void genl_lock(void);

extern void genl_unlock(void);

#ifdef CONFIG_LOCKDEP

extern bool lockdep_genl_is_held(void);

#endif



/* for synchronisation between af_netlink and genetlink */

extern atomic_t genl_sk_destructing_cnt;

extern wait_queue_head_t genl_sk_destructing_waitq;



/**

 * rcu_dereference_genl - rcu_dereference with debug checking

 * @p: The pointer to read, prior to dereferencing

 *

 * Do an rcu_dereference(p), but check caller either holds rcu_read_lock()

 * or genl mutex. Note : Please prefer genl_dereference() or rcu_dereference()

 */

#define rcu_dereference_genl(p)					\

	rcu_dereference_check(p, lockdep_genl_is_held())



/**

 * genl_dereference - fetch RCU pointer when updates are prevented by genl mutex

 * @p: The pointer to read, prior to dereferencing

 *

 * Return the value of the specified RCU-protected pointer, but omit

 * the READ_ONCE(), because caller holds genl mutex.

 */

#define genl_dereference(p)					\

	rcu_dereference_protected(p, lockdep_genl_is_held())



#define MODULE_ALIAS_GENL_FAMILY(family)\

 MODULE_ALIAS_NET_PF_PROTO_NAME(PF_NETLINK, NETLINK_GENERIC, "-family-" family)

net/netlink/genetlink.c

+0 −8
Original line number Diff line number Diff line
@@ -40,14 +40,6 @@ void genl_unlock(void) 
}

EXPORT_SYMBOL(genl_unlock);



#ifdef CONFIG_LOCKDEP

bool lockdep_genl_is_held(void)

{

	return lockdep_is_held(&genl_mutex);

}

EXPORT_SYMBOL(lockdep_genl_is_held);

#endif



static void genl_lock_all(void)

{

	down_write(&cb_lock);