mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-24 09:50:04 +00:00
2591ffd308
This inline has ~500 callsites.
On 04/14/2015 08:37 PM, David Miller wrote:
> That BUG_ON() was added 7 years ago, and I don't remember it ever
> triggering or helping us diagnose something, so just remove it and
> keep the function inlined.
On x86 allyesconfig build:
text data bss dec hex filename
82447071 22255384 20627456 125329911 77861f7 vmlinux4
82441375 22255384 20627456 125324215 7784bb7 vmlinux5prime
Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
CC: Eric W. Biederman <ebiederm@xmission.com>
CC: David S. Miller <davem@davemloft.net>
CC: Jan Engelhardt <jengelh@medozas.de>
CC: Jiri Pirko <jpirko@redhat.com>
CC: linux-kernel@vger.kernel.org
CC: netdev@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>
46 lines
1.1 KiB
C
46 lines
1.1 KiB
C
/*
|
|
* generic net pointers
|
|
*/
|
|
|
|
#ifndef __NET_GENERIC_H__
|
|
#define __NET_GENERIC_H__
|
|
|
|
#include <linux/bug.h>
|
|
#include <linux/rcupdate.h>
|
|
|
|
/*
|
|
* Generic net pointers are to be used by modules to put some private
|
|
* stuff on the struct net without explicit struct net modification
|
|
*
|
|
* The rules are simple:
|
|
* 1. set pernet_operations->id. After register_pernet_device you
|
|
* will have the id of your private pointer.
|
|
* 2. set pernet_operations->size to have the code allocate and free
|
|
* a private structure pointed to from struct net.
|
|
* 3. do not change this pointer while the net is alive;
|
|
* 4. do not try to have any private reference on the net_generic object.
|
|
*
|
|
* After accomplishing all of the above, the private pointer can be
|
|
* accessed with the net_generic() call.
|
|
*/
|
|
|
|
struct net_generic {
|
|
unsigned int len;
|
|
struct rcu_head rcu;
|
|
|
|
void *ptr[0];
|
|
};
|
|
|
|
static inline void *net_generic(const struct net *net, int id)
|
|
{
|
|
struct net_generic *ng;
|
|
void *ptr;
|
|
|
|
rcu_read_lock();
|
|
ng = rcu_dereference(net->gen);
|
|
ptr = ng->ptr[id - 1];
|
|
rcu_read_unlock();
|
|
|
|
return ptr;
|
|
}
|
|
#endif
|