From 9754a5b840a209bc1f192d59f63e81b698a55ac8 Mon Sep 17 00:00:00 2001
From: Ingo Molnar <mingo@elte.hu>
Date: Fri, 22 Aug 2008 08:22:23 +0200
Subject: [PATCH] x86: work around MTRR mask setting, v2
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 | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/arch/x86/kernel/cpu/mtrr/generic.c b/arch/x86/kernel/cpu/mtrr/generic.c
index 43102e03e2d16..cb7d3b6a80eb8 100644
--- a/arch/x86/kernel/cpu/mtrr/generic.c
+++ b/arch/x86/kernel/cpu/mtrr/generic.c
@@ -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;
}
}
--
GitLab