linux-kernel - [RFC/PATCH 5/15] get_unmapped_area handles MAP

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Message-Id: <20070322060229.E9857DE04B@ozlabs.org>
Date:	Thu, 22 Mar 2007 17:00:45 +1100
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Linux Memory Management <linux-mm@...ck.org>
CC:	<linux-kernel@...r.kernel.org>
Subject: [RFC/PATCH 5/15] get_unmapped_area handles MAP_FIXED on i386

Signed-off-by: Benjamin Herrenschmidt <benh@...nel.crashing.org>
---

 arch/i386/mm/hugetlbpage.c |    6 ++++++
 1 file changed, 6 insertions(+)

Index: linux-cell/arch/i386/mm/hugetlbpage.c
===================================================================
--- linux-cell.orig/arch/i386/mm/hugetlbpage.c	2007-03-22 16:08:12.000000000 +1100
+++ linux-cell/arch/i386/mm/hugetlbpage.c	2007-03-22 16:14:19.000000000 +1100
@@ -367,6 +367,12 @@ 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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