Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=4147c8747eace9058c606b35e700060297edaf91
Commit:     4147c8747eace9058c606b35e700060297edaf91
Parent:     5d119b2c9a490e2d647eae134211b32a18a04c7d
Author:     Joerg Roedel <[EMAIL PROTECTED]>
AuthorDate: Thu Feb 21 15:50:14 2008 +0100
Committer:  Ingo Molnar <[EMAIL PROTECTED]>
CommitDate: Tue Feb 26 12:55:57 2008 +0100

    x86: don't print a warning when MTRR are blank and running in KVM
    
    Inside a KVM virtual machine the MTRRs are usually blank. This confuses 
Linux
    and causes a warning message at boot. This patch removes that warning 
message
    when running Linux as a KVM guest.
    
    Signed-off-by: Joerg Roedel <[EMAIL PROTECTED]>
    Signed-off-by: Ingo Molnar <[EMAIL PROTECTED]>
---
 arch/x86/kernel/cpu/mtrr/main.c |    8 ++++++--
 1 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kernel/cpu/mtrr/main.c b/arch/x86/kernel/cpu/mtrr/main.c
index c8fda3e..be83336 100644
--- a/arch/x86/kernel/cpu/mtrr/main.c
+++ b/arch/x86/kernel/cpu/mtrr/main.c
@@ -43,6 +43,7 @@
 #include <asm/uaccess.h>
 #include <asm/processor.h>
 #include <asm/msr.h>
+#include <asm/kvm_para.h>
 #include "mtrr.h"
 
 u32 num_var_ranges = 0;
@@ -689,8 +690,11 @@ int __init mtrr_trim_uncached_memory(unsigned long end_pfn)
 
        /* kvm/qemu doesn't have mtrr set right, don't trim them all */
        if (!highest_pfn) {
-               printk(KERN_WARNING "WARNING: strange, CPU MTRRs all blank?\n");
-               WARN_ON(1);
+               if (!kvm_para_available()) {
+                       printk(KERN_WARNING
+                               "WARNING: strange, CPU MTRRs all blank?\n");
+                       WARN_ON(1);
+               }
                return 0;
        }
 
-
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