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[PATCH] uml: merge duplicated page table code

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There is a lot of code which is duplicated between the 2 and 3 level
implementation, with the only difference that the 3-level implementation is a
bit more generalized (instead of accessing directly pte_t.pte, it uses the
appropriate access macros).

So this code is joined together.

As obvious, a "core code nice cleanup" is not a "stability-friendly patch" so
usual care applies.

Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Cc: Paolo Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Jeff Dike 2005-09-03 15:57:41 -07:00 • committed by Linus Torvalds
parent c56004901f
commit 08964c565b
3 changed files with 46 additions and 63 deletions
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27
include/asm-um/pgtable-2level.h
View file

@ -35,35 +35,8 @@
static inline int pgd_newpage(pgd_t pgd) { return 0; }
static inline void pgd_mkuptodate(pgd_t pgd) { }
#define pte_present(x) (pte_val(x) & (_PAGE_PRESENT | _PAGE_PROTNONE))
static inline pte_t pte_mknewprot(pte_t pte)
{
pte_val(pte) |= _PAGE_NEWPROT;
return(pte);
}
static inline pte_t pte_mknewpage(pte_t pte)
{
pte_val(pte) |= _PAGE_NEWPAGE;
return(pte);
}
static inline void set_pte(pte_t *pteptr, pte_t pteval)
{
/* If it's a swap entry, it needs to be marked _PAGE_NEWPAGE so
* fix_range knows to unmap it. _PAGE_NEWPROT is specific to
* mapped pages.
*/
*pteptr = pte_mknewpage(pteval);
if(pte_present(*pteptr)) *pteptr = pte_mknewprot(*pteptr);
}
#define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval)
#define set_pmd(pmdptr, pmdval) (*(pmdptr) = (pmdval))
#define pte_page(x) pfn_to_page(pte_pfn(x))
#define pte_none(x) !(pte_val(x) & ~_PAGE_NEWPAGE)
#define pte_pfn(x) phys_to_pfn(pte_val(x))
#define pfn_pte(pfn, prot) __pte(pfn_to_phys(pfn) | pgprot_val(prot))
#define pfn_pmd(pfn, prot) __pmd(pfn_to_phys(pfn) | pgprot_val(prot))