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x86: soften multi-BAR mapping sanity check warning message

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Impact: make debug warning less scary

The ioremap() time multi-BAR map warning has been causing false
positives:

  http://lkml.org/lkml/2008/12/10/432
  http://lkml.org/lkml/2008/12/11/136

So make it less scary by making it once-per-boot, by making it KERN_INFO
and by adding this text:

  "Info: mapping multiple BARs. Your kernel is fine."

Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Ingo Molnar 2008-12-12 09:20:12 +01:00
parent 5f5db59132
commit 8808500f26
1 changed files with 2 additions and 1 deletions
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3
arch/x86/mm/ioremap.c
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@ -223,7 +223,8 @@ static void __iomem *__ioremap_caller(resource_size_t phys_addr,
* Check if the request spans more than any BAR in the iomem resource
* tree.
*/
WARN_ON(iomem_map_sanity_check(phys_addr, size));
WARN_ONCE(iomem_map_sanity_check(phys_addr, size),
KERN_INFO "Info: mapping multiple BARs. Your kernel is fine.");
/*
* Don't allow anybody to remap normal RAM that we're using..