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hugetlbfs: common code update for s390

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Huge ptes have a special type on s390 and cannot be handled with the standard
pte functions in certain cases, e.g.  because of a different location of the
invalid bit.  This patch adds some new architecture- specific functions to
hugetlb common code, as a prerequisite for the s390 large page support.

This won't affect other architectures in functionality, but I need to add some
new dummy inline functions to the headers.

Acked-by: Martin Schwidefsky <[email protected]>
Signed-off-by: Gerald Schaefer <[email protected]>
Cc: Paul Mundt <[email protected]>
Cc: "Luck, Tony" <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: "David S. Miller" <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Gerald Schaefer 2008-04-28 02:13:29 -07:00 • committed by Linus Torvalds
commit 7f2e9525ba
6 changed files with 206 additions and 15 deletions
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37
include/asm-ia64/hugetlb.h
View file

@ -39,4 +39,41 @@ static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
{
}
static inline int huge_pte_none(pte_t pte)
{
return pte_none(pte);
}
static inline pte_t huge_pte_wrprotect(pte_t pte)
{
return pte_wrprotect(pte);
}
static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
unsigned long addr, pte_t *ptep)
{
ptep_set_wrprotect(mm, addr, ptep);
}
static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
unsigned long addr, pte_t *ptep,
pte_t pte, int dirty)
{
return ptep_set_access_flags(vma, addr, ptep, pte, dirty);
}
static inline pte_t huge_ptep_get(pte_t *ptep)
{
return *ptep;
}
static inline int arch_prepare_hugepage(struct page *page)
{
return 0;
}
static inline void arch_release_hugepage(struct page *page)
{
}
#endif /* _ASM_IA64_HUGETLB_H */