x86_64: off-by-two error in aperture.c

I'm using a custom BIOS to configure the northbridge GART at address
0x80000000, size 2G.  Linux complains:

"Aperture from northbridge cpu 0 beyond 4GB. Ignoring."

I think there's an off-by-two error in arch/x86_64/kernel/aperture.c:

AK: use correct types for i386

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/char/agp/amd64-agp.c b/drivers/char/agp/amd64-agp.c
index c9f0f250d78f..801abdd29066 100644
--- a/drivers/char/agp/amd64-agp.c
+++ b/drivers/char/agp/amd64-agp.c
@@ -268,7 +268,7 @@ static int __devinit aperture_valid(u64 aper, u32 size)
                 printk(KERN_ERR PFX "Aperture too small (%d MB)\n", size>>20);
                 return 0;
         }
-        if (aper + size > 0xffffffff) {
+       if ((u64)aper + size > 0x100000000ULL) {
                 printk(KERN_ERR PFX "Aperture out of bounds\n");
                 return 0;
         }