/*
 * Copyright 2016, Cyril Bur, IBM Corp.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 *
 * Sending one self a signal should always get delivered.
 */

#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>

#include <altivec.h>

#include "utils.h"

#define MAX_ATTEMPT 500000
#define TIMEOUT 5

extern long signal_self(pid_t pid, int sig);

static sig_atomic_t signaled;
static sig_atomic_t fail;

static void signal_handler(int sig)
{
	if (sig == SIGUSR1)
		signaled = 1;
	else
		fail = 1;
}

static int test_signal()
{
	int i;
	struct sigaction act;
	pid_t ppid = getpid();
	pid_t pid;

	act.sa_handler = signal_handler;
	act.sa_flags = 0;
	sigemptyset(&act.sa_mask);
	if (sigaction(SIGUSR1, &act, NULL) < 0) {
		perror("sigaction SIGUSR1");
		exit(1);
	}
	if (sigaction(SIGALRM, &act, NULL) < 0) {
		perror("sigaction SIGALRM");
		exit(1);
	}

	/* Don't do this for MAX_ATTEMPT, its simply too long */
	for(i  = 0; i < 1000; i++) {
		pid = fork();
		if (pid == -1) {
			perror("fork");
			exit(1);
		}
		if (pid == 0) {
			signal_self(ppid, SIGUSR1);
			exit(1);
		} else {
			alarm(0); /* Disable any pending */
			alarm(2);
			while (!signaled && !fail)
				asm volatile("": : :"memory");
			if (!signaled) {
				fprintf(stderr, "Didn't get signal from child\n");
				FAIL_IF(1); /* For the line number */
			}
			/* Otherwise we'll loop too fast and fork() will eventually fail */
			waitpid(pid, NULL, 0);
		}
	}

	for (i = 0; i < MAX_ATTEMPT; i++) {
		long rc;

		alarm(0); /* Disable any pending */
		signaled = 0;
		alarm(TIMEOUT);
		rc = signal_self(ppid, SIGUSR1);
		if (rc) {
			fprintf(stderr, "(%d) Fail reason: %d rc=0x%lx",
					i, fail, rc);
			FAIL_IF(1); /* For the line number */
		}
		while (!signaled && !fail)
			asm volatile("": : :"memory");
		if (!signaled) {
			fprintf(stderr, "(%d) Fail reason: %d rc=0x%lx",
					i, fail, rc);
			FAIL_IF(1); /* For the line number */
		}
	}

	return 0;
}

int main(void)
{
	test_harness_set_timeout(300);
	return test_harness(test_signal, "signal");
}
sparc/include/uapi/asm/mman.h'>
<input type='hidden' name='id' value='7a7b5df84b6b4e5d599c7289526eed96541a0654'/><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='/cgit.cgi/linux/net-next.git/commit/?id=7a7b5df84b6b4e5d599c7289526eed96541a0654'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/tools?id=7a7b5df84b6b4e5d599c7289526eed96541a0654'>tools</a>/<a href='/cgit.cgi/linux/net-next.git/commit/tools/arch?id=7a7b5df84b6b4e5d599c7289526eed96541a0654'>arch</a>/<a href='/cgit.cgi/linux/net-next.git/commit/tools/arch/sparc?id=7a7b5df84b6b4e5d599c7289526eed96541a0654'>sparc</a>/<a href='/cgit.cgi/linux/net-next.git/commit/tools/arch/sparc/include?id=7a7b5df84b6b4e5d599c7289526eed96541a0654'>include</a>/<a href='/cgit.cgi/linux/net-next.git/commit/tools/arch/sparc/include/uapi?id=7a7b5df84b6b4e5d599c7289526eed96541a0654'>uapi</a>/<a href='/cgit.cgi/linux/net-next.git/commit/tools/arch/sparc/include/uapi/asm?id=7a7b5df84b6b4e5d599c7289526eed96541a0654'>asm</a>/<a href='/cgit.cgi/linux/net-next.git/commit/tools/arch/sparc/include/uapi/asm/mman.h?id=7a7b5df84b6b4e5d599c7289526eed96541a0654'>mman.h</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='7a7b5df84b6b4e5d599c7289526eed96541a0654'/><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>Johan Hovold &lt;johan@kernel.org&gt;</td><td class='right'>2017-01-30 11:26:38 +0100</td></tr>
<tr><th>committer</th><td>Jiri Kosina &lt;jkosina@suse.cz&gt;</td><td class='right'>2017-01-31 12:59:32 +0100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/arch/sparc/include/uapi/asm/mman.h?id=7a7b5df84b6b4e5d599c7289526eed96541a0654'>7a7b5df84b6b4e5d599c7289526eed96541a0654</a> (<a href='/cgit.cgi/linux/net-next.git/patch/tools/arch/sparc/include/uapi/asm/mman.h?id=7a7b5df84b6b4e5d599c7289526eed96541a0654'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=7a7b5df84b6b4e5d599c7289526eed96541a0654'>cf7514c7ddf4410fe37ca9099a2785e1cf08fa7d</a> /<a href='/cgit.cgi/linux/net-next.git/tree/tools/arch/sparc/include/uapi/asm/mman.h?id=7a7b5df84b6b4e5d599c7289526eed96541a0654'>tools/arch/sparc/include/uapi/asm/mman.h</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/arch/sparc/include/uapi/asm/mman.h?id=877a021e08ccb6434718c0cc781fdf943c884cc0'>877a021e08ccb6434718c0cc781fdf943c884cc0</a> (<a href='/cgit.cgi/linux/net-next.git/diff/tools/arch/sparc/include/uapi/asm/mman.h?id=7a7b5df84b6b4e5d599c7289526eed96541a0654&amp;id2=877a021e08ccb6434718c0cc781fdf943c884cc0'>diff</a>)</td></tr></table>
<div class='commit-subject'>HID: cp2112: fix sleep-while-atomic</div><div class='commit-msg'>A recent commit fixing DMA-buffers on stack added a shared transfer
buffer protected by a spinlock. This is broken as the USB HID request
callbacks can sleep. Fix this up by replacing the spinlock with a mutex.

Fixes: 1ffb3c40ffb5 ("HID: cp2112: make transfer buffers DMA capable")
Cc: stable &lt;stable@vger.kernel.org&gt;	# 4.9
Signed-off-by: Johan Hovold &lt;johan@kernel.org&gt;
Reviewed-by: Benjamin Tissoires &lt;benjamin.tissoires@redhat.com&gt;
Signed-off-by: Jiri Kosina &lt;jkosina@suse.cz&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=7a7b5df84b6b4e5d599c7289526eed96541a0654'>Diffstat</a> (limited to 'tools/arch/sparc/include/uapi/asm/mman.h')</div><table summary='diffstat' class='diffstat'>