/* SPDX-License-Identifier: GPL-2.0 */
/*
 *  BSD Process Accounting for Linux - Definitions
 *
 *  Author: Marco van Wieringen (mvw@planets.elm.net)
 *
 *  This header file contains the definitions needed to implement
 *  BSD-style process accounting. The kernel accounting code and all
 *  user-level programs that try to do something useful with the
 *  process accounting log must include this file.
 *
 *  Copyright (C) 1995 - 1997 Marco van Wieringen - ELM Consultancy B.V.
 *
 */
#ifndef _LINUX_ACCT_H
#define _LINUX_ACCT_H

#include <uapi/linux/acct.h>



#ifdef CONFIG_BSD_PROCESS_ACCT
struct pid_namespace;
extern int acct_parm[]; /* for sysctl */
extern void acct_collect(long exitcode, int group_dead);
extern void acct_process(void);
extern void acct_exit_ns(struct pid_namespace *);
#else
#define acct_collect(x,y)	do { } while (0)
#define acct_process()		do { } while (0)
#define acct_exit_ns(ns)	do { } while (0)
#endif

/*
 * ACCT_VERSION numbers as yet defined:
 * 0: old format (until 2.6.7) with 16 bit uid/gid
 * 1: extended variant (binary compatible on M68K)
 * 2: extended variant (binary compatible on everything except M68K)
 * 3: new binary incompatible format (64 bytes)
 * 4: new binary incompatible format (128 bytes)
 * 5: new binary incompatible format (128 bytes, second half)
 *
 */

#undef ACCT_VERSION
#undef AHZ

#ifdef CONFIG_BSD_PROCESS_ACCT_V3
#define ACCT_VERSION	3
#define AHZ		100
typedef struct acct_v3 acct_t;
#else
#ifdef CONFIG_M68K
#define ACCT_VERSION	1
#else
#define ACCT_VERSION	2
#endif
#define AHZ		(USER_HZ)
typedef struct acct acct_t;
#endif

#include <linux/jiffies.h>
/*
 * Yet another set of HZ to *HZ helper functions.
 * See <linux/jiffies.h> for the original.
 */

static inline u32 jiffies_to_AHZ(unsigned long x)
{
#if (TICK_NSEC % (NSEC_PER_SEC / AHZ)) == 0
# if HZ < AHZ
	return x * (AHZ / HZ);
# else
	return x / (HZ / AHZ);
# endif
#else
        u64 tmp = (u64)x * TICK_NSEC;
        do_div(tmp, (NSEC_PER_SEC / AHZ));
        return (long)tmp;
#endif
}

static inline u64 nsec_to_AHZ(u64 x)
{
#if (NSEC_PER_SEC % AHZ) == 0
	do_div(x, (NSEC_PER_SEC / AHZ));
#elif (AHZ % 512) == 0
	x *= AHZ/512;
	do_div(x, (NSEC_PER_SEC / 512));
#else
	/*
         * max relative error 5.7e-8 (1.8s per year) for AHZ <= 1024,
         * overflow after 64.99 years.
         * exact for AHZ=60, 72, 90, 120, 144, 180, 300, 600, 900, ...
         */
	x *= 9;
	do_div(x, (unsigned long)((9ull * NSEC_PER_SEC + (AHZ/2))
	                          / AHZ));
#endif
	return x;
}

#endif	/* _LINUX_ACCT_H */
</option>
<option value='linux-2.6.39.y'>linux-2.6.39.y</option>
<option value='linux-3.0.y'>linux-3.0.y</option>
<option value='linux-3.1.y'>linux-3.1.y</option>
<option value='linux-3.10.y'>linux-3.10.y</option>
<option value='linux-3.11.y'>linux-3.11.y</option>
<option value='linux-3.12.y'>linux-3.12.y</option>
<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>
<option value='linux-4.19.y'>linux-4.19.y</option>
<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>
<option value='linux-5.11.y'>linux-5.11.y</option>
<option value='linux-5.12.y'>linux-5.12.y</option>
<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>
<option value='linux-5.9.y'>linux-5.9.y</option>
<option value='linux-6.0.y'>linux-6.0.y</option>
<option value='linux-6.1.y'>linux-6.1.y</option>
<option value='linux-6.10.y'>linux-6.10.y</option>
<option value='linux-6.11.y'>linux-6.11.y</option>
<option value='linux-6.12.y'>linux-6.12.y</option>
<option value='linux-6.13.y'>linux-6.13.y</option>
<option value='linux-6.14.y'>linux-6.14.y</option>
<option value='linux-6.15.y'>linux-6.15.y</option>
<option value='linux-6.16.y'>linux-6.16.y</option>
<option value='linux-6.17.y'>linux-6.17.y</option>
<option value='linux-6.18.y'>linux-6.18.y</option>
<option value='linux-6.19.y'>linux-6.19.y</option>
<option value='linux-6.2.y'>linux-6.2.y</option>
<option value='linux-6.3.y'>linux-6.3.y</option>
<option value='linux-6.4.y'>linux-6.4.y</option>
<option value='linux-6.5.y'>linux-6.5.y</option>
<option value='linux-6.6.y' selected='selected'>linux-6.6.y</option>
<option value='linux-6.7.y'>linux-6.7.y</option>
<option value='linux-6.8.y'>linux-6.8.y</option>
<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>
<table class='tabs'><tr><td>
<a href='/distro/kernel/?h=linux-6.6.y'>summary</a><a href='/distro/kernel/refs/?h=linux-6.6.y&amp;id=6b5c4818621fb0d3eda1d4059634b38e09bd7243'>refs</a><a class='active' href='/distro/kernel/log/kernel/locking/qspinlock_paravirt.h?h=linux-6.6.y'>log</a><a href='/distro/kernel/tree/kernel/locking/qspinlock_paravirt.h?h=linux-6.6.y&amp;id=6b5c4818621fb0d3eda1d4059634b38e09bd7243'>tree</a><a href='/distro/kernel/commit/kernel/locking/qspinlock_paravirt.h?h=linux-6.6.y&amp;id=6b5c4818621fb0d3eda1d4059634b38e09bd7243'>commit</a><a href='/distro/kernel/diff/kernel/locking/qspinlock_paravirt.h?h=linux-6.6.y&amp;id=6b5c4818621fb0d3eda1d4059634b38e09bd7243'>diff</a></td><td class='form'><form class='right' method='get' action='/distro/kernel/log/kernel/locking/qspinlock_paravirt.h'>
<input type='hidden' name='h' value='linux-6.6.y'/><input type='hidden' name='id' value='6b5c4818621fb0d3eda1d4059634b38e09bd7243'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/distro/kernel/log/?h=linux-6.6.y&amp;id=6b5c4818621fb0d3eda1d4059634b38e09bd7243'>root</a>/<a href='/distro/kernel/log/kernel?h=linux-6.6.y&amp;id=6b5c4818621fb0d3eda1d4059634b38e09bd7243'>kernel</a>/<a href='/distro/kernel/log/kernel/locking?h=linux-6.6.y&amp;id=6b5c4818621fb0d3eda1d4059634b38e09bd7243'>locking</a>/<a href='/distro/kernel/log/kernel/locking/qspinlock_paravirt.h?h=linux-6.6.y&amp;id=6b5c4818621fb0d3eda1d4059634b38e09bd7243'>qspinlock_paravirt.h</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/kernel/locking/qspinlock_paravirt.h?h=linux-6.6.y&amp;id=6b5c4818621fb0d3eda1d4059634b38e09bd7243&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2019-04-10 10:56:03 +0200'>2019-04-10</span></td><td><a href='/distro/kernel/commit/kernel/locking/qspinlock_paravirt.h?h=linux-6.6.y&amp;id=ad53fa10fa9e816067bbae7109845940f5e6df50'>locking/qspinlock_stat: Introduce generic lockevent_*() counting APIs</a></td><td>Waiman Long</td></tr>
<tr><td><span title='2018-10-31 08:54:16 -0700'>2018-10-31</span></td><td><a href='/distro/kernel/commit/kernel/locking/qspinlock_paravirt.h?h=linux-6.6.y&amp;id=57c8a661d95dff48dd9c2f2496139082bbaf241a'>mm: remove include/linux/bootmem.h</a></td><td>Mike Rapoport</td></tr>
<tr><td><span title='2018-10-17 08:37:32 +0200'>2018-10-17</span></td><td><a href='/distro/kernel/commit/kernel/locking/qspinlock_paravirt.h?h=linux-6.6.y&amp;id=0fa809ca7f81c47bea6706bc689e941eb25d7e89'>locking/pvqspinlock: Extend node size when pvqspinlock is configured</a></td><td>Waiman Long</td></tr>
<tr><td><span title='2018-04-27 12:55:22 +0200'>2018-04-27</span></td><td><a href='/distro/kernel/commit/kernel/locking/qspinlock_paravirt.h?h=linux-6.6.y&amp;id=3bea9adc96842b8a7345c7fb202c16ae9c8d5b25'>locking/qspinlock: Remove duplicate clear_pending() function from PV code</a></td><td>Will Deacon</td></tr>
<tr><td><span title='2018-04-27 09:48:53 +0200'>2018-04-27</span></td><td><a href='/distro/kernel/commit/kernel/locking/qspinlock_paravirt.h?h=linux-6.6.y&amp;id=81d3dc9a349b1e61d77106bbb05a6e6dd29b9d5e'>locking/qspinlock: Add stat tracking for pending vs. slowpath</a></td><td>Waiman Long</td></tr>
<tr><td><span title='2018-04-27 09:48:47 +0200'>2018-04-27</span></td><td><a href='/distro/kernel/commit/kernel/locking/qspinlock_paravirt.h?h=linux-6.6.y&amp;id=59fb586b4a07b4e1a0ee577140ab4842ba451acd'>locking/qspinlock: Remove unbounded cmpxchg() loop from locking slowpath</a></td><td>Will Deacon</td></tr>
<tr><td><span title='2018-04-27 09:48:45 +0200'>2018-04-27</span></td><td><a href='/distro/kernel/commit/kernel/locking/qspinlock_paravirt.h?h=linux-6.6.y&amp;id=625e88be1f41b53cec55827c984e4a89ea8ee9f9'>locking/qspinlock: Merge 'struct __qspinlock' into 'struct qspinlock'</a></td><td>Will Deacon</td></tr>
<tr><td><span title='2017-11-08 10:10:04 +0100'>2017-11-08</span></td><td><a href='/distro/kernel/commit/kernel/locking/qspinlock_paravirt.h?h=linux-6.6.y&amp;id=11752adb68a388724b1935d57bf543897c34d80b'>locking/pvqspinlock: Implement hybrid PV queued/unfair locks</a></td><td>Waiman Long</td></tr>
<tr><td><span title='2017-11-02 11:10:55 +0100'>2017-11-02</span></td><td><a href='/distro/kernel/commit/kernel/locking/qspinlock_paravirt.h?h=linux-6.6.y&amp;id=b24413180f5600bcb3bb70fbed5cf186b60864bd'>License cleanup: add SPDX GPL-2.0 license identifier to files with no license</a></td><td>Greg Kroah-Hartman</td></tr>
<tr><td><span title='2017-08-29 15:14:38 +0200'>2017-08-29</span></td><td><a href='/distro/kernel/commit/kernel/locking/qspinlock_paravirt.h?h=linux-6.6.y&amp;id=34d54f3d6917f519693dbe873ee59cd06fb515ed'>locking/pvqspinlock: Relax cmpxchg's to improve performance on some architect...</a></td><td>Waiman Long</td></tr>
<tr><td><span title='2017-07-06 16:24:33 -0700'>2017-07-06</span></td><td><a href='/distro/kernel/commit/kernel/locking/qspinlock_paravirt.h?h=linux-6.6.y&amp;id=3d375d78593cd5daeead34ed3279c4ff63dd04f2'>mm: update callers to use HASH_ZERO flag</a></td><td>Pavel Tatashin</td></tr>
<tr><td><span title='2017-01-12 09:35:57 +0100'>2017-01-12</span></td><td><a href='/distro/kernel/commit/kernel/locking/qspinlock_paravirt.h?h=linux-6.6.y&amp;id=75437bb304b20a2b350b9a8e9f9238d5e24e12ba'>locking/pvqspinlock: Don't wait if vCPU is preempted</a></td><td>Pan Xinhui</td></tr>
<tr><td><span title='2016-09-22 15:25:51 +0200'>2016-09-22</span></td><td><a href='/distro/kernel/commit/kernel/locking/qspinlock_paravirt.h?h=linux-6.6.y&amp;id=b193049375b04df3ada8c3347b7083db95918bc3'>locking/pv-qspinlock: Use cmpxchg_release() in __pv_queued_spin_unlock()</a></td><td>Pan Xinhui</td></tr>
<tr><td><span title='2016-08-10 14:16:02 +0200'>2016-08-10</span></td><td><a href='/distro/kernel/commit/kernel/locking/qspinlock_paravirt.h?h=linux-6.6.y&amp;id=08be8f63c40c030b5cf95b4368e314e563a86301'>locking/pvstat: Separate wait_again and spurious wakeup stats</a></td><td>Waiman Long</td></tr>
<tr><td><span title='2016-08-10 14:16:02 +0200'>2016-08-10</span></td><td><a href='/distro/kernel/commit/kernel/locking/qspinlock_paravirt.h?h=linux-6.6.y&amp;id=64a5e3cb308028dba0676daae0a7821d770036fa'>locking/qspinlock: Improve readability</a></td><td>Peter Zijlstra</td></tr>
<tr><td><span title='2016-08-10 14:13:28 +0200'>2016-08-10</span></td><td><a href='/distro/kernel/commit/kernel/locking/qspinlock_paravirt.h?h=linux-6.6.y&amp;id=229ce631574761870a2ac938845fadbd07f35caa'>locking/pvqspinlock: Fix double hash race</a></td><td>Wanpeng Li</td></tr>
<tr><td><span title='2016-06-16 10:48:33 +0200'>2016-06-16</span></td><td><a href='/distro/kernel/commit/kernel/locking/qspinlock_paravirt.h?h=linux-6.6.y&amp;id=e37837fb62f95a81bdcefa86ceea043df84937d7'>locking/atomic: Remove the deprecated atomic_{set,clear}_mask() functions</a></td><td>Peter Zijlstra</td></tr>
<tr><td><span title='2016-02-29 10:02:42 +0100'>2016-02-29</span></td><td><a href='/distro/kernel/commit/kernel/locking/qspinlock_paravirt.h?h=linux-6.6.y&amp;id=32d62510f949d3c8e83b9b3b844a84446611661b'>locking/pvqspinlock: Enable slowpath locking count tracking</a></td><td>Waiman Long</td></tr>
<tr><td><span title='2016-02-29 10:02:41 +0100'>2016-02-29</span></td><td><a href='/distro/kernel/commit/kernel/locking/qspinlock_paravirt.h?h=linux-6.6.y&amp;id=eaff0e7003cca6c2748b67ead2d4b1a8ad858fc7'>locking/pvqspinlock: Move lock stealing count tracking code into pv_queued_sp...</a></td><td>Waiman Long</td></tr>
<tr><td><span title='2015-12-04 11:39:51 +0100'>2015-12-04</span></td><td><a href='/distro/kernel/commit/kernel/locking/qspinlock_paravirt.h?h=linux-6.6.y&amp;id=cd0272fab785077c121aa91ec2401090965bbc37'>locking/pvqspinlock: Queue node adaptive spinning</a></td><td>Waiman Long</td></tr>
<tr><td><span title='2015-12-04 11:39:51 +0100'>2015-12-04</span></td><td><a href='/distro/kernel/commit/kernel/locking/qspinlock_paravirt.h?h=linux-6.6.y&amp;id=1c4941fd53afb46ab15826628e4819866d008a28'>locking/pvqspinlock: Allow limited lock stealing</a></td><td>Waiman Long</td></tr>
<tr><td><span title='2015-12-04 11:39:50 +0100'>2015-12-04</span></td><td><a href='/distro/kernel/commit/kernel/locking/qspinlock_paravirt.h?h=linux-6.6.y&amp;id=45e898b735620f426eddf105fc886d2966593a58'>locking/pvqspinlock: Collect slowpath lock statistics</a></td><td>Waiman Long</td></tr>
<tr><td><span title='2015-11-23 10:02:02 +0100'>2015-11-23</span></td><td><a href='/distro/kernel/commit/kernel/locking/qspinlock_paravirt.h?h=linux-6.6.y&amp;id=d78045306c41bd9334b956e4e7fa77cc72f06a40'>locking/pvqspinlock, x86: Optimize the PV unlock code path</a></td><td>Waiman Long</td></tr>
<tr><td><span title='2015-09-18 09:27:29 +0200'>2015-09-18</span></td><td><a href='/distro/kernel/commit/kernel/locking/qspinlock_paravirt.h?h=linux-6.6.y&amp;id=93edc8bd7750ff3cae088bfca453ea73dc9004a4'>locking/pvqspinlock: Kick the PV CPU unconditionally when _Q_SLOW_VAL</a></td><td>Waiman Long</td></tr>
<tr><td><span title='2015-08-03 10:57:11 +0200'>2015-08-03</span></td><td><a href='/distro/kernel/commit/kernel/locking/qspinlock_paravirt.h?h=linux-6.6.y&amp;id=75d2270280686bff21b9ba66c7f3dd379c887981'>locking/pvqspinlock: Only kick CPU at unlock time</a></td><td>Waiman Long</td></tr>
<tr><td><span title='2015-08-03 10:57:09 +0200'>2015-08-03</span></td><td><a href='/distro/kernel/commit/kernel/locking/qspinlock_paravirt.h?h=linux-6.6.y&amp;id=3b3fdf10a8add87ef0050138d51bfee9ab4983df'>locking/pvqspinlock: Order pv_unhash() after cmpxchg() on unlock slowpath</a></td><td>Will Deacon</td></tr>
<tr><td><span title='2015-08-03 10:57:08 +0200'>2015-08-03</span></td><td><a href='/distro/kernel/commit/kernel/locking/qspinlock_paravirt.h?h=linux-6.6.y&amp;id=0b792bf519e68108d577fcec815ab50913787012'>locking: Clean up pvqspinlock warning</a></td><td>Peter Zijlstra</td></tr>
<tr><td><span title='2015-07-21 10:18:07 +0200'>2015-07-21</span></td><td><a href='/distro/kernel/commit/kernel/locking/qspinlock_paravirt.h?h=linux-6.6.y&amp;id=cba77f03f2c7b6cc0b0a44a3c679e0abade7da62'>locking/pvqspinlock: Fix kernel panic in locking-selftest</a></td><td>Waiman Long</td></tr>
<tr><td><span title='2015-05-19 08:32:00 +0200'>2015-05-19</span></td><td><a href='/distro/kernel/commit/kernel/locking/qspinlock_paravirt.h?h=linux-6.6.y&amp;id=b92b8b35a2e38bde319fd1d68ec84628c1f1b0fb'>locking/arch: Rename set_mb() to smp_store_mb()</a></td><td>Peter Zijlstra</td></tr>
<tr><td><span title='2015-05-11 09:51:52 +0200'>2015-05-11</span></td><td><a href='/distro/kernel/commit/kernel/locking/qspinlock_paravirt.h?h=linux-6.6.y&amp;id=52c9d2badd1ae4d11c29de57d4e964e48afd3cb4'>locking/pvqspinlock: Replace xchg() by the more descriptive set_mb()</a></td><td>Waiman Long</td></tr>
<tr><td><span title='2015-05-08 12:37:05 +0200'>2015-05-08</span></td><td><a href='/distro/kernel/commit/kernel/locking/qspinlock_paravirt.h?h=linux-6.6.y&amp;id=a23db284fe0d1879ca2002bf31077b5efa2fe2ca'>locking/pvqspinlock: Implement simple paravirt support for the qspinlock</a></td><td>Waiman Long</td></tr>