[PATCH/RFC 4/6] drm: Constify gem_vm_ops pointer

[Laurent Pinchart]

The GEM vm operations structure is passed to the VM core that stores it
in a const field. There vm operations structures can thus be const in
DRM as well.

Signed-off-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
Cc: Inki Dae <inki.dae at samsung.com>
Cc: Alan Cox <alan at linux.intel.com>
Cc: Daniel Vetter <daniel.vetter at ffwll.ch>
Cc: Alex Deucher <alexdeucher at gmail.com>
Cc: Dave Airlie <airlied at redhat.com>
Cc: Rob Clark <rob.clark at linaro.org>
---
 drivers/gpu/drm/exynos/exynos_drm_drv.c |    2 +-
 drivers/gpu/drm/gma500/framebuffer.c    |    2 +-
 drivers/gpu/drm/gma500/psb_drv.c        |    2 +-
 drivers/gpu/drm/i915/i915_drv.c         |    2 +-
 drivers/gpu/drm/udl/udl_drv.c           |    2 +-
 drivers/staging/omapdrm/omap_drv.c      |    2 +-
 include/drm/drmP.h                      |    2 +-
 7 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.c b/drivers/gpu/drm/exynos/exynos_drm_drv.c
index 3b8670c..0080102 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_drv.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_drv.c
@@ -193,7 +193,7 @@ static void exynos_drm_lastclose(struct drm_device *dev)
 	exynos_drm_fbdev_restore_mode(dev);
 }
 
-static struct vm_operations_struct exynos_drm_gem_vm_ops = {
+static const struct vm_operations_struct exynos_drm_gem_vm_ops = {
 	.fault = exynos_drm_gem_fault,
 	.open = drm_gem_vm_open,
 	.close = drm_gem_vm_close,
diff --git a/drivers/gpu/drm/gma500/framebuffer.c b/drivers/gpu/drm/gma500/framebuffer.c
index 8ea202f..fe00915 100644
--- a/drivers/gpu/drm/gma500/framebuffer.c
+++ b/drivers/gpu/drm/gma500/framebuffer.c
@@ -153,7 +153,7 @@ static void psbfb_vm_close(struct vm_area_struct *vma)
 {
 }
 
-static struct vm_operations_struct psbfb_vm_ops = {
+static const struct vm_operations_struct psbfb_vm_ops = {
 	.fault	= psbfb_vm_fault,
 	.open	= psbfb_vm_open,
 	.close	= psbfb_vm_close
diff --git a/drivers/gpu/drm/gma500/psb_drv.c b/drivers/gpu/drm/gma500/psb_drv.c
index c34adf9..728262d 100644
--- a/drivers/gpu/drm/gma500/psb_drv.c
+++ b/drivers/gpu/drm/gma500/psb_drv.c
@@ -619,7 +619,7 @@ static const struct dev_pm_ops psb_pm_ops = {
 	.runtime_idle = psb_runtime_idle,
 };
 
-static struct vm_operations_struct psb_gem_vm_ops = {
+static const struct vm_operations_struct psb_gem_vm_ops = {
 	.fault = psb_gem_fault,
 	.open = drm_gem_vm_open,
 	.close = drm_gem_vm_close,
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index ae8a64f..b81bc47 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -874,7 +874,7 @@ static const struct dev_pm_ops i915_pm_ops = {
 	.restore = i915_pm_resume,
 };
 
-static struct vm_operations_struct i915_gem_vm_ops = {
+static const struct vm_operations_struct i915_gem_vm_ops = {
 	.fault = i915_gem_fault,
 	.open = drm_gem_vm_open,
 	.close = drm_gem_vm_close,
diff --git a/drivers/gpu/drm/udl/udl_drv.c b/drivers/gpu/drm/udl/udl_drv.c
index 5367390..82e6921 100644
--- a/drivers/gpu/drm/udl/udl_drv.c
+++ b/drivers/gpu/drm/udl/udl_drv.c
@@ -38,7 +38,7 @@ static void udl_usb_disconnect(struct usb_interface *interface)
 	drm_unplug_dev(dev);
 }
 
-static struct vm_operations_struct udl_gem_vm_ops = {
+static const struct vm_operations_struct udl_gem_vm_ops = {
 	.fault = udl_gem_fault,
 	.open = drm_gem_vm_open,
 	.close = drm_gem_vm_close,
diff --git a/drivers/staging/omapdrm/omap_drv.c b/drivers/staging/omapdrm/omap_drv.c
index 620b8d5..071c770 100644
--- a/drivers/staging/omapdrm/omap_drv.c
+++ b/drivers/staging/omapdrm/omap_drv.c
@@ -726,7 +726,7 @@ static void dev_irq_uninstall(struct drm_device *dev)
 	DBG("irq_uninstall: dev=%p", dev);
 }
 
-static struct vm_operations_struct omap_gem_vm_ops = {
+static const struct vm_operations_struct omap_gem_vm_ops = {
 	.fault = omap_gem_fault,
 	.open = drm_gem_vm_open,
 	.close = drm_gem_vm_close,
diff --git a/include/drm/drmP.h b/include/drm/drmP.h
index 95ef926..5d0d2de 100644
--- a/include/drm/drmP.h
+++ b/include/drm/drmP.h
@@ -941,7 +941,7 @@ struct drm_driver {
 			    uint32_t handle);
 
 	/* Driver private ops for this object */
-	struct vm_operations_struct *gem_vm_ops;
+	const struct vm_operations_struct *gem_vm_ops;
 
 	int major;
 	int minor;
-- 
1.7.3.4