[PATCH] mark struct file_operations const 7
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>
diff --git a/ipc/mqueue.c b/ipc/mqueue.c
index 02717f7..fafdef3 100644
--- a/ipc/mqueue.c
+++ b/ipc/mqueue.c
@@ -85,7 +85,7 @@
};
static struct inode_operations mqueue_dir_inode_operations;
-static struct file_operations mqueue_file_operations;
+static const struct file_operations mqueue_file_operations;
static struct super_operations mqueue_super_ops;
static void remove_notification(struct mqueue_inode_info *info);
@@ -1166,7 +1166,7 @@
.unlink = mqueue_unlink,
};
-static struct file_operations mqueue_file_operations = {
+static const struct file_operations mqueue_file_operations = {
.flush = mqueue_flush_file,
.poll = mqueue_poll_file,
.read = mqueue_read_file,
diff --git a/ipc/shm.c b/ipc/shm.c
index f8e10a2..5bb617f 100644
--- a/ipc/shm.c
+++ b/ipc/shm.c
@@ -42,7 +42,7 @@
#include "util.h"
-static struct file_operations shm_file_operations;
+static const struct file_operations shm_file_operations;
static struct vm_operations_struct shm_vm_ops;
static struct ipc_ids init_shm_ids;
@@ -249,7 +249,7 @@
return 0;
}
-static struct file_operations shm_file_operations = {
+static const struct file_operations shm_file_operations = {
.mmap = shm_mmap,
.release = shm_release,
#ifndef CONFIG_MMU
diff --git a/ipc/util.c b/ipc/util.c
index 115e9aa..08a6479 100644
--- a/ipc/util.c
+++ b/ipc/util.c
@@ -205,7 +205,7 @@
}
#ifdef CONFIG_PROC_FS
-static struct file_operations sysvipc_proc_fops;
+static const struct file_operations sysvipc_proc_fops;
/**
* ipc_init_proc_interface - Create a proc interface for sysipc types using a seq_file interface.
* @path: Path in procfs
@@ -879,7 +879,7 @@
return seq_release_private(inode, file);
}
-static struct file_operations sysvipc_proc_fops = {
+static const struct file_operations sysvipc_proc_fops = {
.open = sysvipc_proc_open,
.read = seq_read,
.llseek = seq_lseek,