include/net/aligned_data.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 #ifndef _NET_ALIGNED_DATA_H
   3 #define _NET_ALIGNED_DATA_H
   4
   5 #include <linux/atomic.h>
   6 #include <linux/types.h>
   7
   8 /* Structure holding cacheline aligned fields on SMP builds.
   9  * Each field or group should have an ____cacheline_aligned_in_smp
  10  * attribute to ensure no accidental false sharing can happen.
  11  */
  12 struct net_aligned_data {
  13         atomic64_t      net_cookie ____cacheline_aligned_in_smp;
  14 #if defined(CONFIG_INET)
  15         atomic_long_t tcp_memory_allocated ____cacheline_aligned_in_smp;
  16         atomic_long_t udp_memory_allocated ____cacheline_aligned_in_smp;
  17 #endif
  18 };
  19
  20 extern struct net_aligned_data net_aligned_data;
  21
  22 #endif /* _NET_ALIGNED_DATA_H */