2 #include <linux/module.h>
5 * check_signature - find BIOS signatures
6 * @io_addr: mmio address to check
7 * @signature: signature block
8 * @length: length of signature
10 * Perform a signature comparison with the mmio address io_addr. This
11 * address should have been obtained by ioremap.
12 * Returns 1 on a match.
15 int check_signature(const volatile void __iomem
*io_addr
,
16 const unsigned char *signature
, int length
)
19 if (readb(io_addr
) != *signature
)
26 EXPORT_SYMBOL(check_signature
);