[PATCH] mark struct file_operations const 3

Many struct file_operations in the kernel can be "const".  Marking them const
moves these to the .rodata section, which avoids false sharing with potential
dirty data.  In addition it'll catch accidental writes at compile time to
these shared resources.

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

3 files changed, 3 insertions, 3 deletions

diff --git a/drivers/char/drm/drm_drv.c b/drivers/char/drm/drm_drv.c
index a70af0de4453..f5b9b2480c14 100644
--- a/drivers/char/drm/drm_drv.c
+++ b/drivers/char/drm/drm_drv.c
@@ -371,7 +371,7 @@ void drm_exit(struct drm_driver *driver)
 EXPORT_SYMBOL(drm_exit);
 
 /** File operations structure */
-static struct file_operations drm_stub_fops = {
+static const struct file_operations drm_stub_fops = {
         .owner = THIS_MODULE,
         .open = drm_stub_open
 };
diff --git a/drivers/char/drm/i810_dma.c b/drivers/char/drm/i810_dma.c
index 60cb4e45a75e..603d17fd2d69 100644
--- a/drivers/char/drm/i810_dma.c
+++ b/drivers/char/drm/i810_dma.c
@@ -112,7 +112,7 @@ static int i810_mmap_buffers(struct file *filp, struct vm_area_struct *vma)
         return 0;
 }
 
-static struct file_operations i810_buffer_fops = {
+static const struct file_operations i810_buffer_fops = {
         .open = drm_open,
         .release = drm_release,
         .ioctl = drm_ioctl,
diff --git a/drivers/char/drm/i830_dma.c b/drivers/char/drm/i830_dma.c
index 95224455ec0c..3314a9fea9e5 100644
--- a/drivers/char/drm/i830_dma.c
+++ b/drivers/char/drm/i830_dma.c
@@ -114,7 +114,7 @@ static int i830_mmap_buffers(struct file *filp, struct vm_area_struct *vma)
         return 0;
 }
 
-static struct file_operations i830_buffer_fops = {
+static const struct file_operations i830_buffer_fops = {
         .open = drm_open,
         .release = drm_release,
         .ioctl = drm_ioctl,