#include <linux/io.h>
#include <linux/export.h>

/**
 *	check_signature		-	find BIOS signatures
 *	@io_addr: mmio address to check
 *	@signature:  signature block
 *	@length: length of signature
 *
 *	Perform a signature comparison with the mmio address io_addr. This
 *	address should have been obtained by ioremap.
 *	Returns 1 on a match.
 */

int check_signature(const volatile void __iomem *io_addr,
			const unsigned char *signature, int length)
{
	while (length--) {
		if (readb(io_addr) != *signature)
			return 0;
		io_addr++;
		signature++;
	}
	return 1;
}
EXPORT_SYMBOL(check_signature);
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=3e5de27e940d00d8d504dfb96625fb654f641509'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/net?id=3e5de27e940d00d8d504dfb96625fb654f641509'>net</a>/<a href='/cgit.cgi/linux/net-next.git/commit/net/vmw_vsock?id=3e5de27e940d00d8d504dfb96625fb654f641509'>vmw_vsock</a>/<a href='/cgit.cgi/linux/net-next.git/commit/net/vmw_vsock/vmci_transport_notify.c?id=3e5de27e940d00d8d504dfb96625fb654f641509'>vmci_transport_notify.c</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='3e5de27e940d00d8d504dfb96625fb654f641509'/><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'>2016-12-04 12:50:51 -0800</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2016-12-04 12:50:51 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/vmw_vsock/vmci_transport_notify.c?id=3e5de27e940d00d8d504dfb96625fb654f641509'>3e5de27e940d00d8d504dfb96625fb654f641509</a> (<a href='/cgit.cgi/linux/net-next.git/patch/net/vmw_vsock/vmci_transport_notify.c?id=3e5de27e940d00d8d504dfb96625fb654f641509'>patch</a>)</td></tr>
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<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/vmw_vsock/vmci_transport_notify.c?id=0cb65c83304a341b9d09678448d7c8b550689531'>0cb65c83304a341b9d09678448d7c8b550689531</a> (<a href='/cgit.cgi/linux/net-next.git/diff/net/vmw_vsock/vmci_transport_notify.c?id=3e5de27e940d00d8d504dfb96625fb654f641509&amp;id2=0cb65c83304a341b9d09678448d7c8b550689531'>diff</a>)</td></tr></table>
<div class='commit-subject'>Linux 4.9-rc8</div><div class='commit-msg'></div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=3e5de27e940d00d8d504dfb96625fb654f641509'>Diffstat</a> (limited to 'net/vmw_vsock/vmci_transport_notify.c')</div><table summary='diffstat' class='diffstat'>