From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: Sun, 6 May 2007 21:50:08 +0000 (-0700)
Subject: get_unmapped_area handles MAP_FIXED on i386
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=5a8130f2b186ac91190d1dcea875d66d08e6a1de;p=openwrt%2Fstaging%2Fblogic.git

get_unmapped_area handles MAP_FIXED on i386

Handle MAP_FIXED in i386 hugetlb_get_unmapped_area(), just call
prepare_hugepage_range.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: William Irwin <bill.irwin@oracle.com>
Cc: Andi Kleen <ak@suse.de>
Cc: Adam Litke <agl@us.ibm.com>
Cc: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/arch/i386/mm/hugetlbpage.c b/arch/i386/mm/hugetlbpage.c
index 34728e4afe48..6272a4fd9e7c 100644
--- a/arch/i386/mm/hugetlbpage.c
+++ b/arch/i386/mm/hugetlbpage.c
@@ -367,6 +367,12 @@ 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);