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https://github.com/torvalds/linux
23 October 2021, 00:29:24 UTC
Revision aed5a833fb18123d7cfc6ce3810ab97efd4869b3 authored by David S. Miller on 04 June 2008, 19:10:21 UTC, committed by David S. Miller on 04 June 2008, 19:10:21 UTC 
Merge branch 'net-2.6-misc-20080605a' of git://git.linux-ipv6.org/gitroot/yoshfuji/linux-2.6-fix
2 parent s a660447 + 9596cc8
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Tip revision: aed5a833fb18123d7cfc6ce3810ab97efd4869b3 authored by David S. Miller on 04 June 2008, 19:10:21 UTC
Merge branch 'net-2.6-misc-20080605a' of git://git.linux-ipv6.org/gitroot/yoshfuji/linux-2.6-fix
Tip revision: aed5a83
check_signature.c 
#include <linux/io.h>
#include <linux/module.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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