linux-kernel - [RFC/PATCH 7/15] get_unmapped_area handles MAP

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Message-Id: <20070322060251.59746DE2A0@ozlabs.org>
Date:	Thu, 22 Mar 2007 17:01:06 +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 7/15] get_unmapped_area handles MAP_FIXED on parisc

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

 arch/parisc/kernel/sys_parisc.c |    5 +++++
 1 file changed, 5 insertions(+)

Index: linux-cell/arch/parisc/kernel/sys_parisc.c
===================================================================
--- linux-cell.orig/arch/parisc/kernel/sys_parisc.c	2007-03-22 15:28:05.000000000 +1100
+++ linux-cell/arch/parisc/kernel/sys_parisc.c	2007-03-22 15:29:08.000000000 +1100
@@ -106,6 +106,11 @@ unsigned long arch_get_unmapped_area(str
 {
 	if (len > TASK_SIZE)
 		return -ENOMEM;
+	/* Might want to check for cache aliasing issues for MAP_FIXED case
+	 * like ARM or MIPS ??? --BenH.
+	 */
+	if (flags & MAP_FIXED)
+		return addr;
 	if (!addr)
 		addr = TASK_UNMAPPED_BASE;
 
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