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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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26
include/asm-ia64/pgtable.h
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@@ -561,32 +561,6 @@ do { \
#define __HAVE_ARCH_PGD_OFFSET_GATE
#define __HAVE_ARCH_LAZY_MMU_PROT_UPDATE
/*
* Override for pgd_addr_end() to deal with the virtual address space holes
* in each region. In regions 0..4 virtual address bits are used like this:
* +--------+------+--------+-----+-----+--------+
* | pgdhi3 | rsvd | pgdlow | pmd | pte | offset |
* +--------+------+--------+-----+-----+--------+
* 'pgdlow' overflows to pgdhi3 (a.k.a. region bits) leaving rsvd==0
*/
#define IA64_PGD_OVERFLOW (PGDIR_SIZE << (PAGE_SHIFT-6))
#define pgd_addr_end(addr, end) \
({ unsigned long __boundary = ((addr) + PGDIR_SIZE) & PGDIR_MASK; \
if (REGION_NUMBER(__boundary) < 5 && \
__boundary & IA64_PGD_OVERFLOW) \
__boundary += (RGN_SIZE - 1) & ~(IA64_PGD_OVERFLOW - 1);\
(__boundary - 1 < (end) - 1)? __boundary: (end); \
})
#define pmd_addr_end(addr, end) \
({ unsigned long __boundary = ((addr) + PMD_SIZE) & PMD_MASK; \
if (REGION_NUMBER(__boundary) < 5 && \
__boundary & IA64_PGD_OVERFLOW) \
__boundary += (RGN_SIZE - 1) & ~(IA64_PGD_OVERFLOW - 1);\
(__boundary - 1 < (end) - 1)? __boundary: (end); \
})
#include <asm-generic/pgtable-nopud.h>
#include <asm-generic/pgtable.h>