linux-kernel - [PATCH 10/12] get_unmapped_area handles MAP

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Message-Id: <20070424053341.68E67DDF10@ozlabs.org>
Date:	Tue, 24 Apr 2007 15:33:39 +1000
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	<linux-kernel@...r.kernel.org>,
	Linux Memory Management <linux-mm@...ck.org>
Subject: [PATCH 10/12] get_unmapped_area handles MAP_FIXED in hugetlbfs

Generic hugetlb_get_unmapped_area() now handles MAP_FIXED by just
calling prepare_hugepage_range()

Signed-off-by: Benjamin Herrenschmidt <benh@...nel.crashing.org>
Acked-by: William Irwin <bill.irwin@...cle.com>

 fs/hugetlbfs/inode.c |    6 ++++++
 1 file changed, 6 insertions(+)

Index: linux-cell/fs/hugetlbfs/inode.c
===================================================================
--- linux-cell.orig/fs/hugetlbfs/inode.c	2007-03-22 16:12:56.000000000 +1100
+++ linux-cell/fs/hugetlbfs/inode.c	2007-03-22 16:16:02.000000000 +1100
@@ -115,6 +115,12 @@ hugetlb_get_unmapped_area(struct file *f
 	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);
-
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