[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>

1 files changed, 7 insertions, 7 deletions

diff --git a/drivers/infiniband/hw/ipath/ipath_fs.c b/drivers/infiniband/hw/ipath/ipath_fs.c
index 79a60f020a21..5b40a846ff95 100644
--- a/drivers/infiniband/hw/ipath/ipath_fs.c
+++ b/drivers/infiniband/hw/ipath/ipath_fs.c
@@ -47,7 +47,7 @@
 static struct super_block *ipath_super;
 
 static int ipathfs_mknod(struct inode *dir, struct dentry *dentry,
-			 int mode, struct file_operations *fops,
+			 int mode, const struct file_operations *fops,
 			 void *data)
 {
 	int error;
@@ -81,7 +81,7 @@ bail:
 
 static int create_file(const char *name, mode_t mode,
 		       struct dentry *parent, struct dentry **dentry,
-		       struct file_operations *fops, void *data)
+		       const struct file_operations *fops, void *data)
 {
 	int error;
 
@@ -105,7 +105,7 @@ static ssize_t atomic_stats_read(struct file *file, char __user *buf,
 				       sizeof ipath_stats);
 }
 
-static struct file_operations atomic_stats_ops = {
+static const struct file_operations atomic_stats_ops = {
 	.read = atomic_stats_read,
 };
 
@@ -127,7 +127,7 @@ static ssize_t atomic_counters_read(struct file *file, char __user *buf,
 				       sizeof counters);
 }
 
-static struct file_operations atomic_counters_ops = {
+static const struct file_operations atomic_counters_ops = {
 	.read = atomic_counters_read,
 };
 
@@ -166,7 +166,7 @@ static ssize_t atomic_node_info_read(struct file *file, char __user *buf,
 				       sizeof nodeinfo);
 }
 
-static struct file_operations atomic_node_info_ops = {
+static const struct file_operations atomic_node_info_ops = {
 	.read = atomic_node_info_read,
 };
 
@@ -291,7 +291,7 @@ static ssize_t atomic_port_info_read(struct file *file, char __user *buf,
 				       sizeof portinfo);
 }
 
-static struct file_operations atomic_port_info_ops = {
+static const struct file_operations atomic_port_info_ops = {
 	.read = atomic_port_info_read,
 };
 
@@ -394,7 +394,7 @@ bail:
 	return ret;
 }
 
-static struct file_operations flash_ops = {
+static const struct file_operations flash_ops = {
 	.read = flash_read,
 	.write = flash_write,
 };