diff options
Diffstat (limited to 'arch/i386/kernel/e820.c')
| -rw-r--r-- | arch/i386/kernel/e820.c | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/arch/i386/kernel/e820.c b/arch/i386/kernel/e820.c index f391abcf7da9..70f39560846a 100644 --- a/arch/i386/kernel/e820.c +++ b/arch/i386/kernel/e820.c @@ -14,6 +14,7 @@ #include <asm/pgtable.h> #include <asm/page.h> #include <asm/e820.h> +#include <asm/setup.h> #ifdef CONFIG_EFI int efi_enabled = 0; @@ -156,21 +157,22 @@ static struct resource standard_io_resources[] = { { .flags = IORESOURCE_BUSY | IORESOURCE_IO } }; -static int romsignature(const unsigned char *x) +#define ROMSIGNATURE 0xaa55 + +static int __init romsignature(const unsigned char *rom) { unsigned short sig; - int ret = 0; - if (probe_kernel_address((const unsigned short *)x, sig) == 0) - ret = (sig == 0xaa55); - return ret; + + return probe_kernel_address((const unsigned short *)rom, sig) == 0 && + sig == ROMSIGNATURE; } static int __init romchecksum(unsigned char *rom, unsigned long length) { - unsigned char *p, sum = 0; + unsigned char sum; - for (p = rom; p < rom + length; p++) - sum += *p; + for (sum = 0; length; length--) + sum += *rom++; return sum == 0; } |