[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>

9 files changed, 22 insertions, 22 deletions

diff --git a/drivers/infiniband/core/ucm.c b/drivers/infiniband/core/ucm.c
index f15220a0ee7..ee51d79a7ad 100644
--- a/drivers/infiniband/core/ucm.c
+++ b/drivers/infiniband/core/ucm.c
@@ -1221,7 +1221,7 @@ static void ib_ucm_release_class_dev(struct class_device *class_dev)
 	kfree(dev);
 }
 
-static struct file_operations ucm_fops = {
+static const struct file_operations ucm_fops = {
 	.owner 	 = THIS_MODULE,
 	.open 	 = ib_ucm_open,
 	.release = ib_ucm_close,
diff --git a/drivers/infiniband/core/ucma.c b/drivers/infiniband/core/ucma.c
index e2e8d329b44..6b81b98961c 100644
--- a/drivers/infiniband/core/ucma.c
+++ b/drivers/infiniband/core/ucma.c
@@ -833,7 +833,7 @@ static int ucma_close(struct inode *inode, struct file *filp)
 	return 0;
 }
 
-static struct file_operations ucma_fops = {
+static const struct file_operations ucma_fops = {
 	.owner 	 = THIS_MODULE,
 	.open 	 = ucma_open,
 	.release = ucma_close,
diff --git a/drivers/infiniband/core/user_mad.c b/drivers/infiniband/core/user_mad.c
index 807fbd6b841..c069ebeba8e 100644
--- a/drivers/infiniband/core/user_mad.c
+++ b/drivers/infiniband/core/user_mad.c
@@ -771,7 +771,7 @@ static int ib_umad_close(struct inode *inode, struct file *filp)
 	return 0;
 }
 
-static struct file_operations umad_fops = {
+static const struct file_operations umad_fops = {
 	.owner 	 	= THIS_MODULE,
 	.read 	 	= ib_umad_read,
 	.write 	 	= ib_umad_write,
@@ -846,7 +846,7 @@ static int ib_umad_sm_close(struct inode *inode, struct file *filp)
 	return ret;
 }
 
-static struct file_operations umad_sm_fops = {
+static const struct file_operations umad_sm_fops = {
 	.owner 	 = THIS_MODULE,
 	.open 	 = ib_umad_sm_open,
 	.release = ib_umad_sm_close
diff --git a/drivers/infiniband/core/uverbs_main.c b/drivers/infiniband/core/uverbs_main.c
index a617ca7b692..f8bc822a3cc 100644
--- a/drivers/infiniband/core/uverbs_main.c
+++ b/drivers/infiniband/core/uverbs_main.c
@@ -375,7 +375,7 @@ static int ib_uverbs_event_close(struct inode *inode, struct file *filp)
 	return 0;
 }
 
-static struct file_operations uverbs_event_fops = {
+static const struct file_operations uverbs_event_fops = {
 	.owner	 = THIS_MODULE,
 	.read 	 = ib_uverbs_event_read,
 	.poll    = ib_uverbs_event_poll,
@@ -679,14 +679,14 @@ static int ib_uverbs_close(struct inode *inode, struct file *filp)
 	return 0;
 }
 
-static struct file_operations uverbs_fops = {
+static const struct file_operations uverbs_fops = {
 	.owner 	 = THIS_MODULE,
 	.write 	 = ib_uverbs_write,
 	.open 	 = ib_uverbs_open,
 	.release = ib_uverbs_close
 };
 
-static struct file_operations uverbs_mmap_fops = {
+static const struct file_operations uverbs_mmap_fops = {
 	.owner 	 = THIS_MODULE,
 	.write 	 = ib_uverbs_write,
 	.mmap    = ib_uverbs_mmap,
diff --git a/drivers/infiniband/hw/ipath/ipath_diag.c b/drivers/infiniband/hw/ipath/ipath_diag.c
index 28c087b824c..0f13a2182cc 100644
--- a/drivers/infiniband/hw/ipath/ipath_diag.c
+++ b/drivers/infiniband/hw/ipath/ipath_diag.c
@@ -59,7 +59,7 @@ static ssize_t ipath_diag_read(struct file *fp, char __user *data,
 static ssize_t ipath_diag_write(struct file *fp, const char __user *data,
 				size_t count, loff_t *off);
 
-static struct file_operations diag_file_ops = {
+static const struct file_operations diag_file_ops = {
 	.owner = THIS_MODULE,
 	.write = ipath_diag_write,
 	.read = ipath_diag_read,
@@ -71,7 +71,7 @@ static ssize_t ipath_diagpkt_write(struct file *fp,
 				   const char __user *data,
 				   size_t count, loff_t *off);
 
-static struct file_operations diagpkt_file_ops = {
+static const struct file_operations diagpkt_file_ops = {
 	.owner = THIS_MODULE,
 	.write = ipath_diagpkt_write,
 };
diff --git a/drivers/infiniband/hw/ipath/ipath_file_ops.c b/drivers/infiniband/hw/ipath/ipath_file_ops.c
index b932bcb67a5..5d64ff87529 100644
--- a/drivers/infiniband/hw/ipath/ipath_file_ops.c
+++ b/drivers/infiniband/hw/ipath/ipath_file_ops.c
@@ -54,7 +54,7 @@ static ssize_t ipath_write(struct file *, const char __user *, size_t,
 static unsigned int ipath_poll(struct file *, struct poll_table_struct *);
 static int ipath_mmap(struct file *, struct vm_area_struct *);
 
-static struct file_operations ipath_file_ops = {
+static const struct file_operations ipath_file_ops = {
 	.owner = THIS_MODULE,
 	.write = ipath_write,
 	.open = ipath_open,
@@ -2153,7 +2153,7 @@ bail:
 
 static struct class *ipath_class;
 
-static int init_cdev(int minor, char *name, struct file_operations *fops,
+static int init_cdev(int minor, char *name, const struct file_operations *fops,
 		     struct cdev **cdevp, struct class_device **class_devp)
 {
 	const dev_t dev = MKDEV(IPATH_MAJOR, minor);
@@ -2210,7 +2210,7 @@ done:
 	return ret;
 }
 
-int ipath_cdev_init(int minor, char *name, struct file_operations *fops,
+int ipath_cdev_init(int minor, char *name, const struct file_operations *fops,
 		    struct cdev **cdevp, struct class_device **class_devp)
 {
 	return init_cdev(minor, name, fops, cdevp, class_devp);
diff --git a/drivers/infiniband/hw/ipath/ipath_fs.c b/drivers/infiniband/hw/ipath/ipath_fs.c
index 79a60f020a2..5b40a846ff9 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,
 };
diff --git a/drivers/infiniband/hw/ipath/ipath_kernel.h b/drivers/infiniband/hw/ipath/ipath_kernel.h
index 986b2125b8f..6d8d05fb599 100644
--- a/drivers/infiniband/hw/ipath/ipath_kernel.h
+++ b/drivers/infiniband/hw/ipath/ipath_kernel.h
@@ -593,7 +593,7 @@ void ipath_shutdown_device(struct ipath_devdata *);
 void ipath_disarm_senderrbufs(struct ipath_devdata *);
 
 struct file_operations;
-int ipath_cdev_init(int minor, char *name, struct file_operations *fops,
+int ipath_cdev_init(int minor, char *name, const struct file_operations *fops,
 		    struct cdev **cdevp, struct class_device **class_devp);
 void ipath_cdev_cleanup(struct cdev **cdevp,
 			struct class_device **class_devp);
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_fs.c b/drivers/infiniband/ulp/ipoib/ipoib_fs.c
index f1cb83688b3..44c174182a8 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_fs.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_fs.c
@@ -146,7 +146,7 @@ static int ipoib_mcg_open(struct inode *inode, struct file *file)
 	return 0;
 }
 
-static struct file_operations ipoib_mcg_fops = {
+static const struct file_operations ipoib_mcg_fops = {
 	.owner   = THIS_MODULE,
 	.open    = ipoib_mcg_open,
 	.read    = seq_read,
@@ -252,7 +252,7 @@ static int ipoib_path_open(struct inode *inode, struct file *file)
 	return 0;
 }
 
-static struct file_operations ipoib_path_fops = {
+static const struct file_operations ipoib_path_fops = {
 	.owner   = THIS_MODULE,
 	.open    = ipoib_path_open,
 	.read    = seq_read,