[PATCH] mark struct file_operations const 6

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>

2 files changed, 5 insertions, 5 deletions

diff --git a/fs/dlm/debug_fs.c b/fs/dlm/debug_fs.c
index ca94a837a5bb..61ba670b9e02 100644
--- a/fs/dlm/debug_fs.c
+++ b/fs/dlm/debug_fs.c
@@ -287,7 +287,7 @@ static int rsb_open(struct inode *inode, struct file *file)
         return 0;
 }
 
-static struct file_operations rsb_fops = {
+static const struct file_operations rsb_fops = {
         .owner   = THIS_MODULE,
         .open    = rsb_open,
         .read    = seq_read,
@@ -331,7 +331,7 @@ static ssize_t waiters_read(struct file *file, char __user *userbuf,
         return rv;
 }
 
-static struct file_operations waiters_fops = {
+static const struct file_operations waiters_fops = {
         .owner   = THIS_MODULE,
         .open    = waiters_open,
         .read    = waiters_read
diff --git a/fs/dlm/user.c b/fs/dlm/user.c
index d378b7fe2a1e..40db61dc95f2 100644
--- a/fs/dlm/user.c
+++ b/fs/dlm/user.c
@@ -25,7 +25,7 @@
 
 static const char *name_prefix="dlm";
 static struct miscdevice ctl_device;
-static struct file_operations device_fops;
+static const struct file_operations device_fops;
 
 #ifdef CONFIG_COMPAT
 
@@ -759,7 +759,7 @@ static int ctl_device_close(struct inode *inode, struct file *file)
         return 0;
 }
 
-static struct file_operations device_fops = {
+static const struct file_operations device_fops = {
         .open    = device_open,
         .release = device_close,
         .read    = device_read,
@@ -768,7 +768,7 @@ static struct file_operations device_fops = {
         .owner   = THIS_MODULE,
 };
 
-static struct file_operations ctl_device_fops = {
+static const struct file_operations ctl_device_fops = {
         .open    = ctl_device_open,
         .release = ctl_device_close,
         .write   = device_write,