x86, pat: Keep identity maps consistent with mmaps even when pat_disabled

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Make reserve_memtype internally take care of pat disabled case and fallback
to default return values.

Remove the specific pat_disabled checks in track_* routines.

Change kernel_map_sync_memtype to sync identity map even when
pat_disabled.

This change ensures that, even for pat_disabled case, we take care of
keeping identity map in sync. Before this patch, in pat disabled case,
ioremap() keeps the identity maps in sync and other APIs like pci and
/dev/mem mmap don't, which is not a very consistent behavior.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>

...

This commit is contained in:

Venkatesh Pallipadi 2009-07-10 09:57:32 -07:00 • committed by H. Peter Anvin

parent 5400743db5

commit 5fc517466d

1 changed files with 3 additions and 10 deletions

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arch/x86/mm/pat.c

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