x86: PAT use reserve free memtype in ioremap and iounmap

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Use reserve_memtype and free_memtype interfaces in ioremap/iounmap to avoid
aliasing.

If there is an existing alias for the region, inherit the memory type from
the alias. If there are conflicting aliases for the entire region, then fail
ioremap.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

...

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venkatesh.pallipadi@intel.com 2008-03-18 17:00:17 -07:00 • committed by Ingo Molnar

parent 3a96ce8cac

commit d7677d4034

1 changed files with 28 additions and 7 deletions

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arch/x86/mm/ioremap.c

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