get_unmapped_area handles MAP_FIXED on sparc64

Handle MAP_FIXED in hugetlb_get_unmapped_area on sparc64 by just using
prepare_hugepage_range()

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: William Irwin <bill.irwin@oracle.com>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/arch/sparc64/mm/hugetlbpage.c b/arch/sparc64/mm/hugetlbpage.c
index 00677b5e1d7d..e224a94e6a1b 100644
--- a/arch/sparc64/mm/hugetlbpage.c
+++ b/arch/sparc64/mm/hugetlbpage.c
@@ -175,6 +175,12 @@ hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
         if (len > task_size)
                 return -ENOMEM;
 
+        if (flags & MAP_FIXED) {
+                if (prepare_hugepage_range(addr, len, pgoff))
+                        return -EINVAL;
+                return addr;
+        }
+
         if (addr) {
                 addr = ALIGN(addr, HPAGE_SIZE);
                 vma = find_vma(mm, addr);