const: mark struct vm_struct_operations

* mark struct vm_area_struct::vm_ops as const
* mark vm_ops in AGP code

But leave TTM code alone, something is fishy there with global vm_ops
being used.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/char/agp/agp.h b/drivers/char/agp/agp.h
index d6f36c0..870f12c 100644
--- a/drivers/char/agp/agp.h
+++ b/drivers/char/agp/agp.h
@@ -131,7 +131,7 @@
 struct agp_bridge_data {
 	const struct agp_version *version;
 	const struct agp_bridge_driver *driver;
-	struct vm_operations_struct *vm_ops;
+	const struct vm_operations_struct *vm_ops;
 	void *previous_size;
 	void *current_size;
 	void *dev_private_data;
diff --git a/drivers/char/agp/alpha-agp.c b/drivers/char/agp/alpha-agp.c
index 5ea4da8..dd84af4 100644
--- a/drivers/char/agp/alpha-agp.c
+++ b/drivers/char/agp/alpha-agp.c
@@ -40,7 +40,7 @@
 	{ 0, 0, 0 }, /* filled in by alpha_core_agp_setup */
 };
 
-struct vm_operations_struct alpha_core_agp_vm_ops = {
+static const struct vm_operations_struct alpha_core_agp_vm_ops = {
 	.fault = alpha_core_agp_vm_fault,
 };
 
diff --git a/drivers/char/mem.c b/drivers/char/mem.c
index 6c8b65d..a074fce 100644
--- a/drivers/char/mem.c
+++ b/drivers/char/mem.c
@@ -301,7 +301,7 @@
 }
 #endif
 
-static struct vm_operations_struct mmap_mem_ops = {
+static const struct vm_operations_struct mmap_mem_ops = {
 #ifdef CONFIG_HAVE_IOREMAP_PROT
 	.access = generic_access_phys
 #endif
diff --git a/drivers/char/mspec.c b/drivers/char/mspec.c
index 30f095a..1997270 100644
--- a/drivers/char/mspec.c
+++ b/drivers/char/mspec.c
@@ -239,7 +239,7 @@
 	return VM_FAULT_NOPAGE;
 }
 
-static struct vm_operations_struct mspec_vm_ops = {
+static const struct vm_operations_struct mspec_vm_ops = {
 	.open = mspec_open,
 	.close = mspec_close,
 	.fault = mspec_fault,