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[PATCH] freepgt: remove arch pgd_addr_end

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ia64 and sparc64 hurriedly had to introduce their own variants of
pgd_addr_end, to leapfrog over the holes in their virtual address spaces which
the final clear_page_range suddenly presented when converted from pgd_index to
pgd_addr_end.  But now that free_pgtables respects the vma list, those holes
are never presented, and the arch variants can go.

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Hugh Dickins
2005-04-19 13:29:17 -07:00
committed by Linus Torvalds
parent 3bf5ee9564
commit 8f6c99c11a
3 changed files with 3 additions and 46 deletions
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8
include/asm-generic/pgtable.h
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@@ -140,17 +140,15 @@ static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addres
#endif
/*
* When walking page tables, get the address of the next boundary, or
* the end address of the range if that comes earlier. Although end might
* wrap to 0 only in clear_page_range, __boundary may wrap to 0 throughout.
* When walking page tables, get the address of the next boundary,
* or the end address of the range if that comes earlier. Although no
* vma end wraps to 0, rounded up __boundary may wrap to 0 throughout.
*/
#ifndef pgd_addr_end
#define pgd_addr_end(addr, end) \
({ unsigned long __boundary = ((addr) + PGDIR_SIZE) & PGDIR_MASK; \
(__boundary - 1 < (end) - 1)? __boundary: (end); \
})
#endif
#ifndef pud_addr_end
#define pud_addr_end(addr, end) \