Organization: Red Hat UK Ltd. Registered Address: Red Hat UK Ltd, Amberley
	Place, 107-111 Peascod Street, Windsor, Berkshire, SI4 1TE, United
	Kingdom.
	Registered in England and Wales under Company Registration No. 3798903
From: David Howells <dhowells@redhat.com>
Subject: [PATCH 1/6] NOMMU: Fix SYSV SHM for NOMMU
To: viro@ZenIV.linux.org.uk, vapier@gentoo.org, lethal@linux-sh.org
Cc: dhowells@redhat.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org
Date: Fri, 08 Jan 2010 22:05:17 +0000
Message-ID: <20100108220516.23489.11319.stgit@warthog.procyon.org.uk>
User-Agent: StGIT/0.14.3
MIME-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 1171
Lines: 34

Commit c4caa778157dbbf04116f0ac2111e389b5cd7a29 broke SYSV SHM for NOMMU by
taking away the pointer to shm_get_unmapped_area() from shm_file_operations.

Put it back conditionally on CONFIG_MMU=n.

file->f_ops->get_unmapped_area() is used to find out the base address for a
mapping of a mappable chardev device or mappable memory-based file (such as a
ramfs file).  It needs to be called prior to file->f_ops->mmap() being called.

Signed-off-by: David Howells <dhowells@redhat.com>
---

 ipc/shm.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)


diff --git a/ipc/shm.c b/ipc/shm.c
index 92fe923..f2da7d2 100644
--- a/ipc/shm.c
+++ b/ipc/shm.c
@@ -298,6 +298,7 @@ static const struct file_operations shm_file_operations = {
 	.mmap		= shm_mmap,
 	.fsync		= shm_fsync,
 	.release	= shm_release,
+	.get_unmapped_area	= shm_get_unmapped_area,
 };
 
 static const struct file_operations shm_file_operations_huge = {

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/