linux-kernel - [RFC/PATCH 12/15] get_unmapped_area handles MAP

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Message-Id: <20070322060302.72AE6DE40D@ozlabs.org>
Date:	Thu, 22 Mar 2007 17:01:28 +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 12/15] get_unmapped_area handles MAP_FIXED in ffb DRM

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

 drivers/char/drm/ffb_drv.c |    6 ++++++
 1 file changed, 6 insertions(+)

Index: linux-cell/drivers/char/drm/ffb_drv.c
===================================================================
--- linux-cell.orig/drivers/char/drm/ffb_drv.c	2007-03-22 16:21:22.000000000 +1100
+++ linux-cell/drivers/char/drm/ffb_drv.c	2007-03-22 16:23:13.000000000 +1100
@@ -191,6 +191,12 @@ unsigned long ffb_get_unmapped_area(stru
 			if ((kvirt & (SHMLBA - 1)) != (addr & (SHMLBA - 1))) {
 				unsigned long koff, aoff;
 
+				/* Address needs adjusting which can't be done
+				 * for MAP_FIXED
+				 */
+				if (flags & MAP_FIXED)
+					return -EINVAL;
+
 				koff = kvirt & (SHMLBA - 1);
 				aoff = addr & (SHMLBA - 1);
 				if (koff < aoff)
-
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