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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2007-05-06 14:50:09 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-05-07 12:12:56 -0700
commitafa37394d6bfc91907b0e08c902d36d848232b99 (patch)
tree6b43da63c023f441a5f22bd1d767989aabb193cd
parent5a8130f2b186ac91190d1dcea875d66d08e6a1de (diff)
get_unmapped_area handles MAP_FIXED on ia64
Handle MAP_FIXED in ia64 arch_get_unmapped_area and hugetlb_get_unmapped_area(), just call prepare_hugepage_range in the later and is_hugepage_only_range() in the former. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: William Irwin <bill.irwin@oracle.com> Cc: "Luck, Tony" <tony.luck@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--arch/ia64/kernel/sys_ia64.c7
-rw-r--r--arch/ia64/mm/hugetlbpage.c8
2 files changed, 15 insertions, 0 deletions
diff --git a/arch/ia64/kernel/sys_ia64.c b/arch/ia64/kernel/sys_ia64.c
index 9ef62a3fbfa..2fcaa2051aa 100644
--- a/arch/ia64/kernel/sys_ia64.c
+++ b/arch/ia64/kernel/sys_ia64.c
@@ -33,6 +33,13 @@ arch_get_unmapped_area (struct file *filp, unsigned long addr, unsigned long len
if (len > RGN_MAP_LIMIT)
return -ENOMEM;
+ /* handle fixed mapping: prevent overlap with huge pages */
+ if (flags & MAP_FIXED) {
+ if (is_hugepage_only_range(mm, addr, len))
+ return -EINVAL;
+ return addr;
+ }
+
#ifdef CONFIG_HUGETLB_PAGE
if (REGION_NUMBER(addr) == RGN_HPAGE)
addr = 0;
diff --git a/arch/ia64/mm/hugetlbpage.c b/arch/ia64/mm/hugetlbpage.c
index 0c7e94edc20..c7c90f4f429 100644
--- a/arch/ia64/mm/hugetlbpage.c
+++ b/arch/ia64/mm/hugetlbpage.c
@@ -148,6 +148,14 @@ unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr, u
return -ENOMEM;
if (len & ~HPAGE_MASK)
return -EINVAL;
+
+ /* Handle MAP_FIXED */
+ if (flags & MAP_FIXED) {
+ if (prepare_hugepage_range(addr, len, pgoff))
+ return -EINVAL;
+ return addr;
+ }
+
/* This code assumes that RGN_HPAGE != 0. */
if ((REGION_NUMBER(addr) != RGN_HPAGE) || (addr & (HPAGE_SIZE - 1)))
addr = HPAGE_REGION_BASE;