mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-21 16:29:59 +00:00
![Dave McCracken](/assets/img/avatar_default.png)
One of the changes necessary for shared page tables is to standardize the pxx_page macros. pte_page and pmd_page have always returned the struct page associated with their entry, while pte_page_kernel and pmd_page_kernel have returned the kernel virtual address. pud_page and pgd_page, on the other hand, return the kernel virtual address. Shared page tables needs pud_page and pgd_page to return the actual page structures. There are very few actual users of these functions, so it is simple to standardize their usage. Since this is basic cleanup, I am submitting these changes as a standalone patch. Per Hugh Dickins' comments about it, I am also changing the pxx_page_kernel macros to pxx_page_vaddr to clarify their meaning. Signed-off-by: Dave McCracken <dmccr@us.ibm.com> Cc: Hugh Dickins <hugh@veritas.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
37 lines
1 KiB
C
37 lines
1 KiB
C
#ifndef _4LEVEL_FIXUP_H
|
|
#define _4LEVEL_FIXUP_H
|
|
|
|
#define __ARCH_HAS_4LEVEL_HACK
|
|
#define __PAGETABLE_PUD_FOLDED
|
|
|
|
#define PUD_SIZE PGDIR_SIZE
|
|
#define PUD_MASK PGDIR_MASK
|
|
#define PTRS_PER_PUD 1
|
|
|
|
#define pud_t pgd_t
|
|
|
|
#define pmd_alloc(mm, pud, address) \
|
|
((unlikely(pgd_none(*(pud))) && __pmd_alloc(mm, pud, address))? \
|
|
NULL: pmd_offset(pud, address))
|
|
|
|
#define pud_alloc(mm, pgd, address) (pgd)
|
|
#define pud_offset(pgd, start) (pgd)
|
|
#define pud_none(pud) 0
|
|
#define pud_bad(pud) 0
|
|
#define pud_present(pud) 1
|
|
#define pud_ERROR(pud) do { } while (0)
|
|
#define pud_clear(pud) pgd_clear(pud)
|
|
#define pud_val(pud) pgd_val(pud)
|
|
#define pud_populate(mm, pud, pmd) pgd_populate(mm, pud, pmd)
|
|
#define pud_page(pud) pgd_page(pud)
|
|
#define pud_page_vaddr(pud) pgd_page_vaddr(pud)
|
|
|
|
#undef pud_free_tlb
|
|
#define pud_free_tlb(tlb, x) do { } while (0)
|
|
#define pud_free(x) do { } while (0)
|
|
#define __pud_free_tlb(tlb, x) do { } while (0)
|
|
|
|
#undef pud_addr_end
|
|
#define pud_addr_end(addr, end) (end)
|
|
|
|
#endif
|