mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-30 08:02:30 +00:00
632a5c1c8f
Now that smp_read_barrier_depends() has been de-emphasized, the less said about it, the better. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Kate Stewart <kstewart@linuxfoundation.org> Cc: Ingo Molnar <mingo@kernel.org> Cc: Philippe Ombredanne <pombredanne@nexb.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
42 lines
1.3 KiB
C
42 lines
1.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef __LINUX_GENERIC_NETLINK_H
|
|
#define __LINUX_GENERIC_NETLINK_H
|
|
|
|
#include <uapi/linux/genetlink.h>
|
|
|
|
|
|
/* 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)
|
|
|
|
#endif /* __LINUX_GENERIC_NETLINK_H */
|