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pagemap: pass mm into pagewalkers

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We need this at least for huge page detection for now, because powerpc
needs the vm_area_struct to be able to determine whether a virtual address
is referring to a huge page (its pmd_huge() doesn't work).

It might also come in handy for some of the other users.

Signed-off-by: Dave Hansen <dave@linux.vnet.ibm.com>
Acked-by: Matt Mackall <mpm@selenic.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Dave Hansen
2008-06-12 15:21:47 -07:00
committed by Linus Torvalds
parent cfc53f65f5
commit 2165009bdf
3 changed files with 56 additions and 47 deletions
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17
include/linux/mm.h
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@@ -760,16 +760,17 @@ unsigned long unmap_vmas(struct mmu_gather **tlb,
* (see walk_page_range for more details)
*/
struct mm_walk {
int (*pgd_entry)(pgd_t *, unsigned long, unsigned long, void *);
int (*pud_entry)(pud_t *, unsigned long, unsigned long, void *);
int (*pmd_entry)(pmd_t *, unsigned long, unsigned long, void *);
int (*pte_entry)(pte_t *, unsigned long, unsigned long, void *);
int (*pte_hole)(unsigned long, unsigned long, void *);
int (*pgd_entry)(pgd_t *, unsigned long, unsigned long, struct mm_walk *);
int (*pud_entry)(pud_t *, unsigned long, unsigned long, struct mm_walk *);
int (*pmd_entry)(pmd_t *, unsigned long, unsigned long, struct mm_walk *);
int (*pte_entry)(pte_t *, unsigned long, unsigned long, struct mm_walk *);
int (*pte_hole)(unsigned long, unsigned long, struct mm_walk *);
struct mm_struct *mm;
void *private;
};
int walk_page_range(const struct mm_struct *, unsigned long addr,
unsigned long end, const struct mm_walk *walk,
void *private);
int walk_page_range(unsigned long addr, unsigned long end,
struct mm_walk *walk);
void free_pgd_range(struct mmu_gather **tlb, unsigned long addr,
unsigned long end, unsigned long floor, unsigned long ceiling);
void free_pgtables(struct mmu_gather **tlb, struct vm_area_struct *start_vma,