[IA64] fix ia64 is_hugepage_only_range

fix is_hugepage_only_range() definition to be "overlaps"
instead of "within architectural restricted hugetlb address
range".  Simplify the ia64 specific code that used to use
is_hugepage_only_range() to just check which region the
address is in.

Signed-off-by: Ken Chen <kenneth.w.chen@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

2 files changed, 4 insertions, 5 deletions

diff --git a/arch/ia64/mm/hugetlbpage.c b/arch/ia64/mm/hugetlbpage.c
index 9dbc7dadd165..8d506710fdbd 100644
--- a/arch/ia64/mm/hugetlbpage.c
+++ b/arch/ia64/mm/hugetlbpage.c
@@ -113,8 +113,7 @@ void hugetlb_free_pgd_range(struct mmu_gather **tlb,
                         unsigned long floor, unsigned long ceiling)
 {
         /*
-         * This is called only when is_hugepage_only_range(addr,),
-         * and it follows that is_hugepage_only_range(end,) also.
+         * This is called to free hugetlb page tables.
          *
          * The offset of these addresses from the base of the hugetlb
          * region must be scaled down by HPAGE_SIZE/PAGE_SIZE so that
@@ -126,9 +125,9 @@ void hugetlb_free_pgd_range(struct mmu_gather **tlb,
 
         addr = htlbpage_to_page(addr);
         end  = htlbpage_to_page(end);
-        if (is_hugepage_only_range(tlb->mm, floor, HPAGE_SIZE))
+        if (REGION_NUMBER(floor) == RGN_HPAGE)
                 floor = htlbpage_to_page(floor);
-        if (is_hugepage_only_range(tlb->mm, ceiling, HPAGE_SIZE))
+        if (REGION_NUMBER(ceiling) == RGN_HPAGE)
                 ceiling = htlbpage_to_page(ceiling);
 
         free_pgd_range(tlb, addr, end, floor, ceiling);
diff --git a/include/asm-ia64/page.h b/include/asm-ia64/page.h
index 3ab27333dae4..6e9aa23250c4 100644
--- a/include/asm-ia64/page.h
+++ b/include/asm-ia64/page.h
@@ -149,7 +149,7 @@ typedef union ia64_va {
                                  | (REGION_OFFSET(x) >> (HPAGE_SHIFT-PAGE_SHIFT)))
 # define HUGETLB_PAGE_ORDER     (HPAGE_SHIFT - PAGE_SHIFT)
 # define is_hugepage_only_range(mm, addr, len)          \
-         (REGION_NUMBER(addr) == RGN_HPAGE &&   \
+         (REGION_NUMBER(addr) == RGN_HPAGE ||   \
           REGION_NUMBER((addr)+(len)-1) == RGN_HPAGE)
 extern unsigned int hpage_shift;
 #endif