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x86, pat: Preparatory changes in pat.c for bigger rbtree change

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Minor changes in pat.c to cleanup code and make it smoother to introduce
bigger rbtree only change in the following patch. The changes are cleaup
only and should not have any functional impact.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
LKML-Reference: <20100210195909.792781000@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@intel.com
2010-02-10 11:57:06 -08:00
committed by H. Peter Anvin
parent 17d9ddc72f
commit be5a0c126a
2 changed files with 117 additions and 83 deletions
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28
arch/x86/mm/pat_internal.h Normal file
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@@ -0,0 +1,28 @@
#ifndef __PAT_INTERNAL_H_
#define __PAT_INTERNAL_H_
extern int pat_debug_enable;
#define dprintk(fmt, arg...) \
do { if (pat_debug_enable) printk(KERN_INFO fmt, ##arg); } while (0)
struct memtype {
u64 start;
u64 end;
unsigned long type;
struct list_head nd;
struct rb_node rb;
};
static inline char *cattr_name(unsigned long flags)
{
switch (flags & _PAGE_CACHE_MASK) {
case _PAGE_CACHE_UC: return "uncached";
case _PAGE_CACHE_UC_MINUS: return "uncached-minus";
case _PAGE_CACHE_WB: return "write-back";
case _PAGE_CACHE_WC: return "write-combining";
default: return "broken";
}
}
#endif /* __PAT_INTERNAL_H_ */