[PATCH] mark struct file_operations const 4

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.

[akpm@sdl.org: dvb fix]
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>

drivers/md/dm-ioctl.c

@@ -1473,7 +1473,7 @@ static int ctl_ioctl(struct inode *inode, struct file *file,
 	return r;
 }
 
-static struct file_operations _ctl_fops = {
+static const struct file_operations _ctl_fops = {
 	.ioctl	 = ctl_ioctl,
 	.owner	 = THIS_MODULE,
 };

drivers/md/md.c

@@ -4920,7 +4920,7 @@ static unsigned int mdstat_poll(struct file *filp, poll_table *wait)
 	return mask;
 }
 
-static struct file_operations md_seq_fops = {
+static const struct file_operations md_seq_fops = {
 	.owner		= THIS_MODULE,
 	.open           = md_seq_open,
 	.read           = seq_read,