x86: work around MTRR mask setting, v2
Ingo Molnar [Fri, 22 Aug 2008 06:22:23 +0000 (08:22 +0200)]
improve the debug printout:

- make it actually display something
- print it only once

would be nice to have a WARN_ONCE() facility, to feed such things to
kerneloops.org.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

arch/x86/kernel/cpu/mtrr/generic.c

index 43102e0..cb7d3b6 100644 (file)
@@ -401,7 +401,12 @@ static void generic_get_mtrr(unsigned int reg, unsigned long *base,
                tmp |= ~((1<<(hi - 1)) - 1);
 
                if (tmp != mask_lo) {
-                       WARN_ON("mtrr: your BIOS has set up an incorrect mask, fixing it up.\n");
+                       static int once = 1;
+
+                       if (once) {
+                               printk(KERN_INFO "mtrr: your BIOS has set up an incorrect mask, fixing it up.\n");
+                               once = 0;
+                       }
                        mask_lo = tmp;
                }
        }