From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: Sun, 6 May 2007 21:50:10 +0000 (-0700)
Subject: get_unmapped_area handles MAP_FIXED on sparc64
X-Git-Tag: accepted/tizen/common/20141203.182822~31916
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=ac35ee484df361e1aed89873a458900693effdbe;p=platform%2Fkernel%2Flinux-arm64.git

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>
---

diff --git a/arch/sparc64/mm/hugetlbpage.c b/arch/sparc64/mm/hugetlbpage.c
index 00677b5..e224a94 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);