/*
 *  linux/fs/proc/kmsg.c
 *
 *  Copyright (C) 1992  by Linus Torvalds
 *
 */

#include <linux/types.h>
#include <linux/errno.h>
#include <linux/time.h>
#include <linux/kernel.h>
#include <linux/poll.h>
#include <linux/proc_fs.h>
#include <linux/fs.h>
#include <linux/syslog.h>

#include <linux/uaccess.h>
#include <asm/io.h>

extern wait_queue_head_t log_wait;

static int kmsg_open(struct inode * inode, struct file * file)
{
	return do_syslog(SYSLOG_ACTION_OPEN, NULL, 0, SYSLOG_FROM_PROC);
}

static int kmsg_release(struct inode * inode, struct file * file)
{
	(void) do_syslog(SYSLOG_ACTION_CLOSE, NULL, 0, SYSLOG_FROM_PROC);
	return 0;
}

static ssize_t kmsg_read(struct file *file, char __user *buf,
			 size_t count, loff_t *ppos)
{
	if ((file->f_flags & O_NONBLOCK) &&
	    !do_syslog(SYSLOG_ACTION_SIZE_UNREAD, NULL, 0, SYSLOG_FROM_PROC))
		return -EAGAIN;
	return do_syslog(SYSLOG_ACTION_READ, buf, count, SYSLOG_FROM_PROC);
}

static unsigned int kmsg_poll(struct file *file, poll_table *wait)
{
	poll_wait(file, &log_wait, wait);
	if (do_syslog(SYSLOG_ACTION_SIZE_UNREAD, NULL, 0, SYSLOG_FROM_PROC))
		return POLLIN | POLLRDNORM;
	return 0;
}


static const struct file_operations proc_kmsg_operations = {
	.read		= kmsg_read,
	.poll		= kmsg_poll,
	.open		= kmsg_open,
	.release	= kmsg_release,
	.llseek		= generic_file_llseek,
};

static int __init proc_kmsg_init(void)
{
	proc_create("kmsg", S_IRUSR, NULL, &proc_kmsg_operations);
	return 0;
}
fs_initcall(proc_kmsg_init);
'>Tobias Klauser</td></tr></table>
<table class='tabs'><tr><td>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?h=nds-private-remove&amp;id=3c49de52d5647cda8b42c4255cf8a29d1e22eff5'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/net?h=nds-private-remove&amp;id=3c49de52d5647cda8b42c4255cf8a29d1e22eff5'>net</a>/<a href='/cgit.cgi/linux/net-next.git/commit/net/sched?h=nds-private-remove&amp;id=3c49de52d5647cda8b42c4255cf8a29d1e22eff5'>sched</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='h' value='nds-private-remove'/><input type='hidden' name='id' value='3c49de52d5647cda8b42c4255cf8a29d1e22eff5'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2016-12-02 18:48:11 -0800</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2016-12-02 18:48:11 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/sched?h=nds-private-remove&amp;id=3c49de52d5647cda8b42c4255cf8a29d1e22eff5'>3c49de52d5647cda8b42c4255cf8a29d1e22eff5</a> (<a href='/cgit.cgi/linux/net-next.git/patch/net/sched?id=3c49de52d5647cda8b42c4255cf8a29d1e22eff5'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?h=nds-private-remove&amp;id=3c49de52d5647cda8b42c4255cf8a29d1e22eff5'>51945ac515d7b31c81e79adcd11e78baebeb1daa</a> /<a href='/cgit.cgi/linux/net-next.git/tree/net/sched?h=nds-private-remove&amp;id=3c49de52d5647cda8b42c4255cf8a29d1e22eff5'>net/sched</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/sched?h=nds-private-remove&amp;id=865563924022d8a307ee6dbc6a9ab4fb4d461cce'>865563924022d8a307ee6dbc6a9ab4fb4d461cce</a> (<a href='/cgit.cgi/linux/net-next.git/diff/net/sched?h=nds-private-remove&amp;id=3c49de52d5647cda8b42c4255cf8a29d1e22eff5&amp;id2=865563924022d8a307ee6dbc6a9ab4fb4d461cce'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/sched?h=nds-private-remove&amp;id=bd041733c9f612b66c519e5a8b1a98b05b94ed24'>bd041733c9f612b66c519e5a8b1a98b05b94ed24</a> (<a href='/cgit.cgi/linux/net-next.git/diff/net/sched?h=nds-private-remove&amp;id=3c49de52d5647cda8b42c4255cf8a29d1e22eff5&amp;id2=bd041733c9f612b66c519e5a8b1a98b05b94ed24'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge branch 'akpm' (patches from Andrew)</div><div class='commit-msg'>Merge more fixes from Andrew Morton:
 "2 fixes"

* emailed patches from Andrew Morton &lt;akpm@linux-foundation.org&gt;:
  mm, vmscan: add cond_resched() into shrink_node_memcg()
  mm: workingset: fix NULL ptr in count_shadow_nodes
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=3c49de52d5647cda8b42c4255cf8a29d1e22eff5'>Diffstat</a> (limited to 'net/sched')</div><table summary='diffstat' class='diffstat'>