[PATCH] freepgt: remove arch pgd_addr_end
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>
diff --git a/include/asm-generic/pgtable.h b/include/asm-generic/pgtable.h
index a3b2871..1f4ec7b 100644
--- a/include/asm-generic/pgtable.h
+++ b/include/asm-generic/pgtable.h
@@ -140,17 +140,15 @@
#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) \
diff --git a/include/asm-ia64/pgtable.h b/include/asm-ia64/pgtable.h
index bbf6dd7..fecfd0f 100644
--- a/include/asm-ia64/pgtable.h
+++ b/include/asm-ia64/pgtable.h
@@ -561,32 +561,6 @@
#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>
diff --git a/include/asm-sparc64/pgtable.h b/include/asm-sparc64/pgtable.h
index ca04ac1..c930115 100644
--- a/include/asm-sparc64/pgtable.h
+++ b/include/asm-sparc64/pgtable.h
@@ -424,21 +424,6 @@
#define GET_IOSPACE(pfn) (pfn >> (BITS_PER_LONG - 4))
#define GET_PFN(pfn) (pfn & 0x0fffffffffffffffUL)
-/* Override for {pgd,pmd}_addr_end() to deal with the virtual address
- * space hole. We simply sign extend bit 43.
- */
-#define pgd_addr_end(addr, end) \
-({ unsigned long __boundary = ((addr) + PGDIR_SIZE) & PGDIR_MASK; \
- __boundary = ((long) (__boundary << 20)) >> 20; \
- (__boundary - 1 < (end) - 1)? __boundary: (end); \
-})
-
-#define pmd_addr_end(addr, end) \
-({ unsigned long __boundary = ((addr) + PMD_SIZE) & PMD_MASK; \
- __boundary = ((long) (__boundary << 20)) >> 20; \
- (__boundary - 1 < (end) - 1)? __boundary: (end); \
-})
-
#include <asm-generic/pgtable.h>
/* We provide our own get_unmapped_area to cope with VA holes for userland */