/*
 * Copyright 2016, Anton Blanchard, Michael Ellerman, IBM Corp.
 * Licensed under GPLv2.
 */

#include <stdio.h>
#include <stdlib.h>
#include <sys/mman.h>
#include <time.h>

#include "utils.h"

#define ITERATIONS 5000000

#define MEMSIZE (128 * 1024 * 1024)

int test_mmap(void)
{
	struct timespec ts_start, ts_end;
	unsigned long i = ITERATIONS;

	clock_gettime(CLOCK_MONOTONIC, &ts_start);

	while (i--) {
		char *c = mmap(NULL, MEMSIZE, PROT_READ|PROT_WRITE,
			       MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
		FAIL_IF(c == MAP_FAILED);
		munmap(c, MEMSIZE);
	}

	clock_gettime(CLOCK_MONOTONIC, &ts_end);

	printf("time = %.6f\n", ts_end.tv_sec - ts_start.tv_sec + (ts_end.tv_nsec - ts_start.tv_nsec) / 1e9);

	return 0;
}

int main(void)
{
	return test_harness(test_mmap, "mmap_bench");
}
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=02608e02fbec04fccf2eb0cc8d8082f65c0a4286'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/drivers?id=02608e02fbec04fccf2eb0cc8d8082f65c0a4286'>drivers</a>/<a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb?id=02608e02fbec04fccf2eb0cc8d8082f65c0a4286'>usb</a>/<a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/core?id=02608e02fbec04fccf2eb0cc8d8082f65c0a4286'>core</a>/<a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/core/quirks.c?id=02608e02fbec04fccf2eb0cc8d8082f65c0a4286'>quirks.c</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='02608e02fbec04fccf2eb0cc8d8082f65c0a4286'/><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>Laura Abbott &lt;labbott@redhat.com&gt;</td><td class='right'>2016-12-21 12:32:54 -0800</td></tr>
<tr><th>committer</th><td>Herbert Xu &lt;herbert@gondor.apana.org.au&gt;</td><td class='right'>2016-12-27 17:32:11 +0800</td></tr>
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<div class='commit-subject'>crypto: testmgr - Use heap buffer for acomp test input</div><div class='commit-msg'>Christopher Covington reported a crash on aarch64 on recent Fedora
kernels:

kernel BUG at ./include/linux/scatterlist.h:140!
Internal error: Oops - BUG: 0 [#1] PREEMPT SMP
Modules linked in:
CPU: 2 PID: 752 Comm: cryptomgr_test Not tainted 4.9.0-11815-ge93b1cc #162
Hardware name: linux,dummy-virt (DT)
task: ffff80007c650080 task.stack: ffff800008910000
PC is at sg_init_one+0xa0/0xb8
LR is at sg_init_one+0x24/0xb8
...
[&lt;ffff000008398db8&gt;] sg_init_one+0xa0/0xb8
[&lt;ffff000008350a44&gt;] test_acomp+0x10c/0x438
[&lt;ffff000008350e20&gt;] alg_test_comp+0xb0/0x118
[&lt;ffff00000834f28c&gt;] alg_test+0x17c/0x2f0
[&lt;ffff00000834c6a4&gt;] cryptomgr_test+0x44/0x50
[&lt;ffff0000080dac70&gt;] kthread+0xf8/0x128
[&lt;ffff000008082ec0&gt;] ret_from_fork+0x10/0x50

The test vectors used for input are part of the kernel image. These
inputs are passed as a buffer to sg_init_one which eventually blows up
with BUG_ON(!virt_addr_valid(buf)). On arm64, virt_addr_valid returns
false for the kernel image since virt_to_page will not return the
correct page. Fix this by copying the input vectors to heap buffer
before setting up the scatterlist.

Reported-by: Christopher Covington &lt;cov@codeaurora.org&gt;
Fixes: d7db7a882deb ("crypto: acomp - update testmgr with support for acomp")
Signed-off-by: Laura Abbott &lt;labbott@redhat.com&gt;
Signed-off-by: Herbert Xu &lt;herbert@gondor.apana.org.au&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=02608e02fbec04fccf2eb0cc8d8082f65c0a4286'>Diffstat</a> (limited to 'drivers/usb/core/quirks.c')</div><table summary='diffstat' class='diffstat'>