/* SPDX-License-Identifier: GPL-2.0 */
/* Atomic operations usable in machine independent code */
#ifndef _LINUX_ATOMIC_H
#define _LINUX_ATOMIC_H
#include <linux/types.h>

#include <asm/atomic.h>
#include <asm/barrier.h>

/*
 * Relaxed variants of xchg, cmpxchg and some atomic operations.
 *
 * We support four variants:
 *
 * - Fully ordered: The default implementation, no suffix required.
 * - Acquire: Provides ACQUIRE semantics, _acquire suffix.
 * - Release: Provides RELEASE semantics, _release suffix.
 * - Relaxed: No ordering guarantees, _relaxed suffix.
 *
 * For compound atomics performing both a load and a store, ACQUIRE
 * semantics apply only to the load and RELEASE semantics only to the
 * store portion of the operation. Note that a failed cmpxchg_acquire
 * does -not- imply any memory ordering constraints.
 *
 * See Documentation/memory-barriers.txt for ACQUIRE/RELEASE definitions.
 */

#define atomic_cond_read_acquire(v, c) smp_cond_load_acquire(&(v)->counter, (c))
#define atomic_cond_read_relaxed(v, c) smp_cond_load_relaxed(&(v)->counter, (c))

#define atomic64_cond_read_acquire(v, c) smp_cond_load_acquire(&(v)->counter, (c))
#define atomic64_cond_read_relaxed(v, c) smp_cond_load_relaxed(&(v)->counter, (c))

/*
 * The idea here is to build acquire/release variants by adding explicit
 * barriers on top of the relaxed variant. In the case where the relaxed
 * variant is already fully ordered, no additional barriers are needed.
 *
 * If an architecture overrides __atomic_acquire_fence() it will probably
 * want to define smp_mb__after_spinlock().
 */
#ifndef __atomic_acquire_fence
#define __atomic_acquire_fence		smp_mb__after_atomic
#endif

#ifndef __atomic_release_fence
#define __atomic_release_fence		smp_mb__before_atomic
#endif

#ifndef __atomic_pre_full_fence
#define __atomic_pre_full_fence		smp_mb__before_atomic
#endif

#ifndef __atomic_post_full_fence
#define __atomic_post_full_fence	smp_mb__after_atomic
#endif

#define __atomic_op_acquire(op, args...)				\
({									\
	typeof(op##_relaxed(args)) __ret  = op##_relaxed(args);		\
	__atomic_acquire_fence();					\
	__ret;								\
})

#define __atomic_op_release(op, args...)				\
({									\
	__atomic_release_fence();					\
	op##_relaxed(args);						\
})

#define __atomic_op_fence(op, args...)					\
({									\
	typeof(op##_relaxed(args)) __ret;				\
	__atomic_pre_full_fence();					\
	__ret = op##_relaxed(args);					\
	__atomic_post_full_fence();					\
	__ret;								\
})

#include <linux/atomic/atomic-arch-fallback.h>
#include <linux/atomic/atomic-long.h>
#include <linux/atomic/atomic-instrumented.h>

#endif /* _LINUX_ATOMIC_H */
1.y'>linux-3.1.y</option>
<option value='linux-3.10.y'>linux-3.10.y</option>
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<option value='linux-3.13.y'>linux-3.13.y</option>
<option value='linux-3.14.y'>linux-3.14.y</option>
<option value='linux-3.15.y'>linux-3.15.y</option>
<option value='linux-3.16.y'>linux-3.16.y</option>
<option value='linux-3.17.y'>linux-3.17.y</option>
<option value='linux-3.18.y'>linux-3.18.y</option>
<option value='linux-3.19.y'>linux-3.19.y</option>
<option value='linux-3.2.y'>linux-3.2.y</option>
<option value='linux-3.3.y'>linux-3.3.y</option>
<option value='linux-3.4.y'>linux-3.4.y</option>
<option value='linux-3.5.y'>linux-3.5.y</option>
<option value='linux-3.6.y'>linux-3.6.y</option>
<option value='linux-3.7.y'>linux-3.7.y</option>
<option value='linux-3.8.y'>linux-3.8.y</option>
<option value='linux-3.9.y'>linux-3.9.y</option>
<option value='linux-4.0.y'>linux-4.0.y</option>
<option value='linux-4.1.y'>linux-4.1.y</option>
<option value='linux-4.10.y'>linux-4.10.y</option>
<option value='linux-4.11.y'>linux-4.11.y</option>
<option value='linux-4.12.y'>linux-4.12.y</option>
<option value='linux-4.13.y'>linux-4.13.y</option>
<option value='linux-4.14.y'>linux-4.14.y</option>
<option value='linux-4.15.y'>linux-4.15.y</option>
<option value='linux-4.16.y'>linux-4.16.y</option>
<option value='linux-4.17.y'>linux-4.17.y</option>
<option value='linux-4.18.y'>linux-4.18.y</option>
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<option value='linux-4.2.y'>linux-4.2.y</option>
<option value='linux-4.20.y'>linux-4.20.y</option>
<option value='linux-4.3.y'>linux-4.3.y</option>
<option value='linux-4.4.y'>linux-4.4.y</option>
<option value='linux-4.5.y'>linux-4.5.y</option>
<option value='linux-4.6.y'>linux-4.6.y</option>
<option value='linux-4.7.y'>linux-4.7.y</option>
<option value='linux-4.8.y'>linux-4.8.y</option>
<option value='linux-4.9.y'>linux-4.9.y</option>
<option value='linux-5.0.y'>linux-5.0.y</option>
<option value='linux-5.1.y'>linux-5.1.y</option>
<option value='linux-5.10.y'>linux-5.10.y</option>
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<option value='linux-5.13.y'>linux-5.13.y</option>
<option value='linux-5.14.y'>linux-5.14.y</option>
<option value='linux-5.15.y'>linux-5.15.y</option>
<option value='linux-5.16.y'>linux-5.16.y</option>
<option value='linux-5.17.y'>linux-5.17.y</option>
<option value='linux-5.18.y'>linux-5.18.y</option>
<option value='linux-5.19.y'>linux-5.19.y</option>
<option value='linux-5.2.y'>linux-5.2.y</option>
<option value='linux-5.3.y'>linux-5.3.y</option>
<option value='linux-5.4.y'>linux-5.4.y</option>
<option value='linux-5.5.y'>linux-5.5.y</option>
<option value='linux-5.6.y'>linux-5.6.y</option>
<option value='linux-5.7.y'>linux-5.7.y</option>
<option value='linux-5.8.y'>linux-5.8.y</option>
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<option value='linux-6.0.y'>linux-6.0.y</option>
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<option value='linux-6.9.y'>linux-6.9.y</option>
<option value='linux-rolling-lts'>linux-rolling-lts</option>
<option value='linux-rolling-stable'>linux-rolling-stable</option>
<option value='master'>master</option>
</select> <input type='submit' value='switch'/></form></td></tr>
<tr><td class='sub'>Hosts the 0x221E linux distro kernel.</td><td class='sub right'>Ubuntu</td></tr></table>
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<div class='path'>path: <a href='/distro/kernel/log/?id=c4e86b4363ac8ecf836def8e46973707688fd98f'>root</a>/<a href='/distro/kernel/log/net?id=c4e86b4363ac8ecf836def8e46973707688fd98f'>net</a>/<a href='/distro/kernel/log/net/8021q?id=c4e86b4363ac8ecf836def8e46973707688fd98f'>8021q</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/distro/kernel/log/net/8021q?id=c4e86b4363ac8ecf836def8e46973707688fd98f&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2024-03-29 15:06:02 -0700'>2024-03-29</span></td><td><a href='/distro/kernel/commit/net/8021q?id=e8058a49e67fe7bc7e4a0308851a3ca3a6d2e45d'>netlink: introduce type-checking attribute iteration</a></td><td>Johannes Berg</td></tr>
<tr><td><span title='2024-02-26 11:46:12 +0000'>2024-02-26</span></td><td><a href='/distro/kernel/commit/net/8021q?id=e353ea9ce471331c13edffd5977eadd602d1bb80'>rtnetlink: prepare nla_put_iflink() to run under RCU</a></td><td>Eric Dumazet</td></tr>
<tr><td><span title='2024-02-21 09:45:23 +0000'>2024-02-21</span></td><td><a href='/distro/kernel/commit/net/8021q?id=7ae9d3423f1db1a3e61b23038005f892858a6936'>net: vlan: constify the struct device_type usage</a></td><td>Ricardo B. Marliere</td></tr>
<tr><td><span title='2024-02-13 18:45:06 -0800'>2024-02-13</span></td><td><a href='/distro/kernel/commit/net/8021q?id=9a3c93af549185863761fc4815ace9ab17dfc350'>vlan: use netdev_lockdep_set_classes()</a></td><td>Eric Dumazet</td></tr>
<tr><td><span title='2024-02-13 18:34:49 -0800'>2024-02-13</span></td><td><a href='/distro/kernel/commit/net/8021q?id=f383ced24d6ae6c1989394d052d3109b9d645f11'>vlan: use xarray iterator to implement /proc/net/vlan/config</a></td><td>Eric Dumazet</td></tr>
<tr><td><span title='2024-01-19 21:25:06 -0800'>2024-01-19</span></td><td><a href='/distro/kernel/commit/net/8021q?id=6c21660fe221a15c789dee2bc2fd95516bc5aeaf'>vlan: skip nested type that is not IFLA_VLAN_QOS_MAPPING</a></td><td>Lin Ma</td></tr>
<tr><td><span title='2023-12-21 22:17:23 +0100'>2023-12-21</span></td><td><a href='/distro/kernel/commit/net/8021q?id=56794e5358542b7c652f202946e53bfd2373b5e0'>Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net</a></td><td>Paolo Abeni</td></tr>
<tr><td><span title='2023-12-19 13:13:56 +0100'>2023-12-19</span></td><td><a href='/distro/kernel/commit/net/8021q?id=01a564bab4876007ce35f312e16797dfe40e4823'>net: check vlan filter feature in vlan_vids_add_by_dev() and vlan_vids_del_by...</a></td><td>Liu Jian</td></tr>
<tr><td><span title='2023-11-18 14:52:57 +0000'>2023-11-18</span></td><td><a href='/distro/kernel/commit/net/8021q?id=b8768dc4077712915f045ba1b198f521493c7914'>net: ethtool: Refactor identical get_ts_info implementations.</a></td><td>Richard Cochran</td></tr>
<tr><td><span title='2023-10-28 11:29:28 +0100'>2023-10-28</span></td><td><a href='/distro/kernel/commit/net/8021q?id=ce1afe280419911b29bc7228f28d4ae85d7e7a2b'>net: fill in MODULE_DESCRIPTION()s under net/802*</a></td><td>Jakub Kicinski</td></tr>
<tr><td><span title='2023-08-18 12:44:56 -0700'>2023-08-18</span></td><td><a href='/distro/kernel/commit/net/8021q?id=7ff57803d24e0cb326251489d70f60462e3e6c04'>Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net</a></td><td>Jakub Kicinski</td></tr>
<tr><td><span title='2023-08-14 08:14:00 +0100'>2023-08-14</span></td><td><a href='/distro/kernel/commit/net/8021q?id=ace0ab3a4b54205a01d3f4a0fd9bdb4616cfb60b'>Revert "vlan: Fix VLAN 0 memory leak"</a></td><td>Vlad Buslov</td></tr>
<tr><td><span title='2023-08-10 14:10:53 -0700'>2023-08-10</span></td><td><a href='/distro/kernel/commit/net/8021q?id=4d016ae42efb214d4b441b0654771ddf34c72891'>Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net</a></td><td>Jakub Kicinski</td></tr>
<tr><td><span title='2023-08-09 13:44:27 -0700'>2023-08-09</span></td><td><a href='/distro/kernel/commit/net/8021q?id=718cb09aaa6fa78cc8124e9517efbc6c92665384'>vlan: Fix VLAN 0 memory leak</a></td><td>Vlad Buslov</td></tr>
<tr><td><span title='2023-08-02 19:11:05 -0700'>2023-08-02</span></td><td><a href='/distro/kernel/commit/net/8021q?id=65c9fde15a651a673637075cc1e9e3aa6aaff203'>net: vlan: convert to ndo_hwtstamp_get() / ndo_hwtstamp_set()</a></td><td>Maxim Georgiev</td></tr>
<tr><td><span title='2023-05-17 12:55:39 +0100'>2023-05-17</span></td><td><a href='/distro/kernel/commit/net/8021q?id=dacab578c7c6cd06c50c89dfa36b0e0f10decd4e'>vlan: fix a potential uninit-value in vlan_dev_hard_start_xmit()</a></td><td>Eric Dumazet</td></tr>
<tr><td><span title='2023-04-21 08:22:14 +0100'>2023-04-21</span></td><td><a href='/distro/kernel/commit/net/8021q?id=abff3e5e2935f5cc34feb559b352179b13eaa066'>vlan: Add MACsec offload operations for VLAN interface</a></td><td>Emeel Hakim</td></tr>
<tr><td><span title='2023-03-17 08:21:16 +0000'>2023-03-17</span></td><td><a href='/distro/kernel/commit/net/8021q?id=731b73dba359e3ff00517c13aa0daa82b34ff466'>vlan: partially enable SIOCSHWTSTAMP in container</a></td><td>Vadim Fedorenko</td></tr>
<tr><td><span title='2022-10-28 20:13:54 -0700'>2022-10-28</span></td><td><a href='/distro/kernel/commit/net/8021q?id=d120d1a63b2c484d6175873d8ee736a633f74b70'>net: Remove the obsolte u64_stats_fetch_*_irq() users (net).</a></td><td>Thomas Gleixner</td></tr>
<tr><td><span title='2022-08-25 10:33:21 +0200'>2022-08-25</span></td><td><a href='/distro/kernel/commit/net/8021q?id=35ffb66547295c72650978f9c28e670e014d0957'>net: gro: skb_gro_header helper function</a></td><td>Richard Gobert</td></tr>
<tr><td><span title='2022-08-22 17:55:48 -0700'>2022-08-22</span></td><td><a href='/distro/kernel/commit/net/8021q?id=bb4d15df9abea1818f434bba34066a208a156d5d'>vlan: move from strlcpy with unused retval to strscpy</a></td><td>Wolfram Sang</td></tr>
<tr><td><span title='2022-07-14 15:27:35 -0700'>2022-07-14</span></td><td><a href='/distro/kernel/commit/net/8021q?id=816cd1688331e0ffa1927889c15e7ed56650a183'>Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net</a></td><td>Jakub Kicinski</td></tr>
<tr><td><span title='2022-07-09 12:26:59 +0100'>2022-07-09</span></td><td><a href='/distro/kernel/commit/net/8021q?id=72a0b329114b1caa8e69dfa7cdad1dd3c69b8602'>vlan: fix memory leak in vlan_newlink()</a></td><td>Eric Dumazet</td></tr>