#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=79e7fff47b7bb4124ef970a13eac4fdeddd1fc25'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include?id=79e7fff47b7bb4124ef970a13eac4fdeddd1fc25'>include</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='79e7fff47b7bb4124ef970a13eac4fdeddd1fc25'/><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>Eric Dumazet &lt;edumazet@google.com&gt;</td><td class='right'>2017-02-02 18:43:28 -0800</td></tr>
<tr><th>committer</th><td>David S. Miller &lt;davem@davemloft.net&gt;</td><td class='right'>2017-02-03 17:28:29 -0500</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include?id=79e7fff47b7bb4124ef970a13eac4fdeddd1fc25'>79e7fff47b7bb4124ef970a13eac4fdeddd1fc25</a> (<a href='/cgit.cgi/linux/net-next.git/patch/include?id=79e7fff47b7bb4124ef970a13eac4fdeddd1fc25'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=79e7fff47b7bb4124ef970a13eac4fdeddd1fc25'>484a1b06f220a2e6566ddbaba553eaa831eca1ba</a> /<a href='/cgit.cgi/linux/net-next.git/tree/include?id=79e7fff47b7bb4124ef970a13eac4fdeddd1fc25'>include</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include?id=7a655c6324a8968ea2f027bf3660c87c42ac3de4'>7a655c6324a8968ea2f027bf3660c87c42ac3de4</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include?id=79e7fff47b7bb4124ef970a13eac4fdeddd1fc25&amp;id2=7a655c6324a8968ea2f027bf3660c87c42ac3de4'>diff</a>)</td></tr></table>
<div class='commit-subject'>net: remove support for per driver ndo_busy_poll()</div><div class='commit-msg'>We added generic support for busy polling in NAPI layer in linux-4.5

No network driver uses ndo_busy_poll() anymore, we can get rid
of the pointer in struct net_device_ops, and its use in sk_busy_loop()

Saves NETIF_F_BUSY_POLL features bit.

Signed-off-by: Eric Dumazet &lt;edumazet@google.com&gt;
Signed-off-by: David S. Miller &lt;davem@davemloft.net&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=79e7fff47b7bb4124ef970a13eac4fdeddd1fc25'>Diffstat</a> (limited to 'include')</div><table summary='diffstat' class='diffstat'><tr><td class='mode'>-rw-r--r--</td><td class='upd'><a href='/cgit.cgi/linux/net-next.git/diff/include/linux/netdev_features.h?id=79e7fff47b7bb4124ef970a13eac4fdeddd1fc25'>include/linux/netdev_features.h</a></td><td class='right'>2</td><td class='graph'><table summary='file diffstat' width='3%'><tr><td class='add' style='width: 0.0%;'/><td class='rem' style='width: 66.7%;'/><td class='none' style='width: 33.3%;'/></tr></table></td></tr>
<tr><td class='mode'>-rw-r--r--</td><td class='upd'><a href='/cgit.cgi/linux/net-next.git/diff/include/linux/netdevice.h?id=79e7fff47b7bb4124ef970a13eac4fdeddd1fc25'>include/linux/netdevice.h</a></td><td class='right'>3</td><td class='graph'><table summary='file diffstat' width='3%'><tr><td class='add' style='width: 0.0%;'/><td class='rem' style='width: 100.0%;'/><td class='none' style='width: 0.0%;'/></tr></table></td></tr>
</table><div class='diffstat-summary'>2 files changed, 0 insertions, 5 deletions</div><table summary='diff' class='diff'><tr><td><div class='head'>diff --git a/include/linux/netdev_features.h b/include/linux/netdev_features.h