kernel/ksysfs.c: add __ro_after_init to bin_attribute structure

The object notes_attr of type bin_attribute is not modified after
getting initailized by ksysfs_init.  Apart from initialization in
ksysfs_init it is also passed as an argument to the function
sysfs_create_bin_file but this argument is of type const.  Therefore,
add __ro_after_init to its declaration.

Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Bhumika Goyal <[email protected]>
Acked-by: Kees Cook <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

kernel/ksysfs.c

@@ -195,7 +195,7 @@ static ssize_t notes_read(struct file *filp, struct kobject *kobj,
 	return count;
 }
 
-static struct bin_attribute notes_attr = {
+static struct bin_attribute notes_attr __ro_after_init  = {
 	.attr = {
 		.name = "notes",
 		.mode = S_IRUGO,