2 files changed, 4 insertions, 4 deletions

diff --git a/arch/i386/kernel/cpu/mtrr/generic.c b/arch/i386/kernel/cpu/mtrr/generic.c
index 0b61eed8bbd8..ee8dc6753953 100644
--- a/arch/i386/kernel/cpu/mtrr/generic.c
+++ b/arch/i386/kernel/cpu/mtrr/generic.c
@@ -366,7 +366,7 @@ int generic_validate_add_page(unsigned long base, unsigned long size, unsigned i
                         printk(KERN_WARNING "mtrr: base(0x%lx000) is not 4 MiB aligned\n", base);
                         return -EINVAL;
                 }
-                if (!(base + size < 0x70000000 || base > 0x7003FFFF) &&
+                if (!(base + size < 0x70000 || base > 0x7003F) &&
                     (type == MTRR_TYPE_WRCOMB
                      || type == MTRR_TYPE_WRBACK)) {
                         printk(KERN_WARNING "mtrr: writable mtrr between 0x70000000 and 0x7003FFFF may hang the CPU.\n");
@@ -374,7 +374,7 @@ int generic_validate_add_page(unsigned long base, unsigned long size, unsigned i
                 }
         }
 
-        if (base + size < 0x100) {
+        if (base < 0x100) {
                 printk(KERN_WARNING "mtrr: cannot set region below 1 MiB (0x%lx000,0x%lx000)\n",
                        base, size);
                 return -EINVAL;
diff --git a/arch/i386/kernel/cpu/mtrr/main.c b/arch/i386/kernel/cpu/mtrr/main.c
index fff90bda4733..2b8b0b361ccb 100644
--- a/arch/i386/kernel/cpu/mtrr/main.c
+++ b/arch/i386/kernel/cpu/mtrr/main.c
@@ -263,8 +263,8 @@ static void set_mtrr(unsigned int reg, unsigned long base,
 
 /**
  *      mtrr_add_page - Add a memory type region
- *      @base: Physical base address of region in pages (4 KB)
- *      @size: Physical size of region in pages (4 KB)
+ *      @base: Physical base address of region in pages (in units of 4 kB!)
+ *      @size: Physical size of region in pages (4 kB)
  *      @type: Type of MTRR desired
  *      @increment: If this is true do usage counting on the region
  *