linux-kernel - [PATCH 11/14] get_unmapped_area handles MAP

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Date:	Wed, 04 Apr 2007 14:01:32 +1000
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	<linux-arch@...r.kernel.org>,
	Linux Memory Management <linux-mm@...ck.org>,
	<linux-kernel@...r.kernel.org>
Subject: [PATCH 11/14] get_unmapped_area handles MAP_FIXED on ramfs (nommu) 

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

 fs/ramfs/file-nommu.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

Index: linux-cell/fs/ramfs/file-nommu.c
===================================================================
--- linux-cell.orig/fs/ramfs/file-nommu.c	2007-03-22 16:18:27.000000000 +1100
+++ linux-cell/fs/ramfs/file-nommu.c	2007-03-22 16:20:14.000000000 +1100
@@ -238,7 +238,10 @@ unsigned long ramfs_nommu_get_unmapped_a
 	struct page **pages = NULL, **ptr, *page;
 	loff_t isize;
 
-	if (!(flags & MAP_SHARED))
+	/* Deal with MAP_FIXED differently ? Forbid it ? Need help from some nommu
+	 * folks there... --BenH.
+	 */
+	if ((flags & MAP_FIXED) || !(flags & MAP_SHARED))
 		return addr;
 
 	/* the mapping mustn't extend beyond the EOF */
-
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