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Update 2.6.x-xfs to 2.6.23-rc4.

Also update fs/xfs with external mainline changes.
There were 12 such missing commits that I detected:

--------
commit ad690ef9e690f6c31f7d310b09ef1314bcec9033
Author: Al Viro <viro@ftp.linux.org.uk>
    xfs ioctl __user annotations

commit 20c2df83d25c6a95affe6157a4c9cac4cf5ffaac
Author: Paul Mundt <lethal@linux-sh.org>
    mm: Remove slab destructors from kmem_cache_create().

commit d0217ac04ca6591841e5665f518e38064f4e65bd
Author: Nick Piggin <npiggin@suse.de>
    mm: fault feedback #1

commit 54cb8821de07f2ffcd28c380ce9b93d5784b40d7
Author: Nick Piggin <npiggin@suse.de>
    mm: merge populate and nopage into fault (fixes nonlinear)

commit d00806b183152af6d24f46f0c33f14162ca1262a
Author: Nick Piggin <npiggin@suse.de>
    mm: fix fault vs invalidate race for linear mappings

commit a569425512253992cc64ebf8b6d00a62f986db3e
Author: Christoph Hellwig <hch@infradead.org>
    knfsd: exportfs: add exportfs.h header

commit 831441862956fffa17b9801db37e6ea1650b0f69
Author: Rafael J. Wysocki <rjw@sisk.pl>
    Freezer: make kernel threads nonfreezable by default

commit 8e1f936b73150f5095448a0fee6d4f30a1f9001d
Author: Rusty Russell <rusty@rustcorp.com.au>
    mm: clean up and kernelify shrinker registration

commit 5ffc4ef45b3b0a57872f631b4e4ceb8ace0d7496
Author: Jens Axboe <jens.axboe@oracle.com>
    sendfile: remove .sendfile from filesystems that use generic_file_sendfile()

commit 8bb7844286fb8c9fce6f65d8288aeb09d03a5e0d
Author: Rafael J. Wysocki <rjw@sisk.pl>
    Add suspend-related notifications for CPU hotplug

commit 59c51591a0ac7568824f541f57de967e88adaa07
Author: Michael Opdenacker <michael@free-electrons.com>
    Fix occurrences of "the the "

commit 0ceb331433e8aad9c5f441a965d7c681f8b9046f
Author: Dmitriy Monakhov <dmonakhov@openvz.org>
    mm: move common segment checks to separate helper function
--------
Merge of 2.6.x-xfs-melb:linux:29656b by kenmcd.

%patch
Index: linux-2.6.22/MAINTAINERS
===================================================================
--- linux-2.6.22.orig/MAINTAINERS	2007-09-06 15:15:55.000000000 +1000
+++ linux-2.6.22/MAINTAINERS	2007-09-06 16:05:17.072217859 +1000
@@ -4175,6 +4175,14 @@
 L:	linux-serial@vger.kernel.org
 S:	Maintained
 
+DMAPI
+P:	Silicon Graphics Inc
+M:	xfs-masters@oss.sgi.com
+M:	vapo@sgi.com
+L:	xfs@oss.sgi.com
+W:	http://oss.sgi.com/projects/xfs
+S:	Supported
+
 X86 3-LEVEL PAGING (PAE) SUPPORT
 P:	Ingo Molnar
 M:	mingo@redhat.com
Index: linux-2.6.22/fs/Kconfig
===================================================================
--- linux-2.6.22.orig/fs/Kconfig	2007-09-06 15:16:19.000000000 +1000
+++ linux-2.6.22/fs/Kconfig	2007-09-06 16:05:17.092215191 +1000
@@ -524,6 +524,25 @@
 
 	  If unsure, say Y.
 
+config DMAPI
+	tristate "DMAPI support"
+	help
+	  The Data Management API is a system interface used to implement
+	  the interface defined in the X/Open document:
+	  "Systems Management: Data Storage Management (XDSM) API",
+	  dated February 1997.  This interface is used by hierarchical
+	  storage management systems.
+
+	  If any DMAPI-capable filesystem is built into the kernel, then
+	  DMAPI must also be built into the kernel.
+
+config DMAPI_DEBUG
+	bool "DMAPI debugging support"
+	depends on DMAPI
+	help
+	  If you don't know whether you need it, then you don't need it:
+	  answer N.
+
 config QUOTA
 	bool "Quota support"
 	help
Index: linux-2.6.22/fs/Makefile
===================================================================
--- linux-2.6.22.orig/fs/Makefile	2007-07-09 09:32:17.000000000 +1000
+++ linux-2.6.22/fs/Makefile	2007-09-06 16:05:17.092215191 +1000
@@ -53,6 +53,8 @@
 obj-$(CONFIG_QFMT_V2)		+= quota_v2.o
 obj-$(CONFIG_QUOTACTL)		+= quota.o
 
+obj-$(CONFIG_DMAPI)		+= dmapi/
+
 obj-$(CONFIG_DNOTIFY)		+= dnotify.o
 
 obj-$(CONFIG_PROC_FS)		+= proc/
Index: linux-2.6.22/fs/exec.c
===================================================================
--- linux-2.6.22.orig/fs/exec.c	2007-09-06 15:16:19.000000000 +1000
+++ linux-2.6.22/fs/exec.c	2007-09-06 16:05:17.092215191 +1000
@@ -688,6 +688,13 @@
 			if (!err) {
 				file = nameidata_to_filp(&nd, O_RDONLY);
 				if (!IS_ERR(file)) {
+					if (file->f_op && file->f_op->open_exec) {
+						err = file->f_op->open_exec(inode);
+						if (err) {
+							fput(file);
+							return ERR_PTR(err);
+						}
+					}
 					err = deny_write_access(file);
 					if (err) {
 						fput(file);
Index: linux-2.6.22/include/linux/mm.h
===================================================================
--- linux-2.6.22.orig/include/linux/mm.h	2007-09-06 15:16:23.000000000 +1000
+++ linux-2.6.22/include/linux/mm.h	2007-09-06 16:05:17.120211456 +1000
@@ -232,6 +232,9 @@
 	unsigned long (*nopfn)(struct vm_area_struct *area,
 			unsigned long address);
 
+#define HAVE_VMOP_MPROTECT
+	int (*mprotect)(struct vm_area_struct * area, unsigned int newflags);
+
 	/* notification that a previously read-only page is about to become
 	 * writable, if an error is returned it will cause a SIGBUS */
 	int (*page_mkwrite)(struct vm_area_struct *vma, struct page *page);
Index: linux-2.6.22/include/linux/fs.h
===================================================================
--- linux-2.6.22.orig/include/linux/fs.h	2007-09-06 15:16:23.000000000 +1000
+++ linux-2.6.22/include/linux/fs.h	2007-09-06 16:08:54.603200663 +1000
@@ -1129,6 +1129,8 @@
 	int (*flock) (struct file *, int, struct file_lock *);
 	ssize_t (*splice_write)(struct pipe_inode_info *, struct file *, loff_t *, size_t, unsigned int);
 	ssize_t (*splice_read)(struct file *, loff_t *, struct pipe_inode_info *, size_t, unsigned int);
+#define HAVE_FOP_OPEN_EXEC
+	int (*open_exec) (struct inode *);
 	int (*setlease)(struct file *, long, struct file_lock **);
 };
 
Index: linux-2.6.22/mm/mprotect.c
===================================================================
--- linux-2.6.22.orig/mm/mprotect.c	2007-09-06 15:16:25.000000000 +1000
+++ linux-2.6.22/mm/mprotect.c	2007-09-06 16:05:17.168205053 +1000
@@ -289,6 +289,11 @@
 		if (error)
 			goto out;
 
+		if (vma->vm_ops && vma->vm_ops->mprotect) {
+			error = vma->vm_ops->mprotect(vma, newflags);
+			if (error < 0)
+				goto out;
+		}
 		tmp = vma->vm_end;
 		if (tmp > end)
 			tmp = end;