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authorEmese Revfy <re.emese@gmail.com>2010-01-19 04:58:23 +0300
committerGreg Kroah-Hartman <gregkh@suse.de>2010-03-08 04:04:49 +0300
commit52cf25d0ab7f78eeecc59ac652ed5090f69b619e (patch)
tree031d1ffb3890bd69c0260c864c512e0be62ac05c /fs
parent6c1733aca0b48db4d0e660d54976a1cca25b5eaf (diff)
downloadlinux-52cf25d0ab7f78eeecc59ac652ed5090f69b619e.tar.xz
Driver core: Constify struct sysfs_ops in struct kobj_type
Constify struct sysfs_ops. This is part of the ops structure constification effort started by Arjan van de Ven et al. Benefits of this constification: * prevents modification of data that is shared (referenced) by many other structure instances at runtime * detects/prevents accidental (but not intentional) modification attempts on archs that enforce read-only kernel data at runtime * potentially better optimized code as the compiler can assume that the const data cannot be changed * the compiler/linker move const data into .rodata and therefore exclude them from false sharing Signed-off-by: Emese Revfy <re.emese@gmail.com> Acked-by: David Teigland <teigland@redhat.com> Acked-by: Matt Domsch <Matt_Domsch@dell.com> Acked-by: Maciej Sosnowski <maciej.sosnowski@intel.com> Acked-by: Hans J. Koch <hjk@linutronix.de> Acked-by: Pekka Enberg <penberg@cs.helsinki.fi> Acked-by: Jens Axboe <jens.axboe@oracle.com> Acked-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'fs')
-rw-r--r--fs/btrfs/sysfs.c4
-rw-r--r--fs/dlm/lockspace.c2
-rw-r--r--fs/ext4/super.c2
-rw-r--r--fs/gfs2/sys.c2
-rw-r--r--fs/ocfs2/cluster/masklog.c2
-rw-r--r--fs/sysfs/file.c8
6 files changed, 10 insertions, 10 deletions
diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c
index a240b6fa81df..4ce16ef702a3 100644
--- a/fs/btrfs/sysfs.c
+++ b/fs/btrfs/sysfs.c
@@ -164,12 +164,12 @@ static void btrfs_root_release(struct kobject *kobj)
complete(&root->kobj_unregister);
}
-static struct sysfs_ops btrfs_super_attr_ops = {
+static const struct sysfs_ops btrfs_super_attr_ops = {
.show = btrfs_super_attr_show,
.store = btrfs_super_attr_store,
};
-static struct sysfs_ops btrfs_root_attr_ops = {
+static const struct sysfs_ops btrfs_root_attr_ops = {
.show = btrfs_root_attr_show,
.store = btrfs_root_attr_store,
};
diff --git a/fs/dlm/lockspace.c b/fs/dlm/lockspace.c
index 26a8bd40400a..f994a7dfda85 100644
--- a/fs/dlm/lockspace.c
+++ b/fs/dlm/lockspace.c
@@ -148,7 +148,7 @@ static void lockspace_kobj_release(struct kobject *k)
kfree(ls);
}
-static struct sysfs_ops dlm_attr_ops = {
+static const struct sysfs_ops dlm_attr_ops = {
.show = dlm_attr_show,
.store = dlm_attr_store,
};
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 2b83b96cb2eb..ce84a6ed4a48 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -2358,7 +2358,7 @@ static void ext4_sb_release(struct kobject *kobj)
}
-static struct sysfs_ops ext4_attr_ops = {
+static const struct sysfs_ops ext4_attr_ops = {
.show = ext4_attr_show,
.store = ext4_attr_store,
};
diff --git a/fs/gfs2/sys.c b/fs/gfs2/sys.c
index 543503010ed0..419042f7f0b6 100644
--- a/fs/gfs2/sys.c
+++ b/fs/gfs2/sys.c
@@ -49,7 +49,7 @@ static ssize_t gfs2_attr_store(struct kobject *kobj, struct attribute *attr,
return a->store ? a->store(sdp, buf, len) : len;
}
-static struct sysfs_ops gfs2_attr_ops = {
+static const struct sysfs_ops gfs2_attr_ops = {
.show = gfs2_attr_show,
.store = gfs2_attr_store,
};
diff --git a/fs/ocfs2/cluster/masklog.c b/fs/ocfs2/cluster/masklog.c
index b39da877b12f..3bb928a2bf7d 100644
--- a/fs/ocfs2/cluster/masklog.c
+++ b/fs/ocfs2/cluster/masklog.c
@@ -136,7 +136,7 @@ static ssize_t mlog_store(struct kobject *obj, struct attribute *attr,
return mlog_mask_store(mlog_attr->mask, buf, count);
}
-static struct sysfs_ops mlog_attr_ops = {
+static const struct sysfs_ops mlog_attr_ops = {
.show = mlog_show,
.store = mlog_store,
};
diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c
index 50b725bcc3f3..ced2299f1c9a 100644
--- a/fs/sysfs/file.c
+++ b/fs/sysfs/file.c
@@ -53,7 +53,7 @@ struct sysfs_buffer {
size_t count;
loff_t pos;
char * page;
- struct sysfs_ops * ops;
+ const struct sysfs_ops * ops;
struct mutex mutex;
int needs_read_fill;
int event;
@@ -75,7 +75,7 @@ static int fill_read_buffer(struct dentry * dentry, struct sysfs_buffer * buffer
{
struct sysfs_dirent *attr_sd = dentry->d_fsdata;
struct kobject *kobj = attr_sd->s_parent->s_dir.kobj;
- struct sysfs_ops * ops = buffer->ops;
+ const struct sysfs_ops * ops = buffer->ops;
int ret = 0;
ssize_t count;
@@ -199,7 +199,7 @@ flush_write_buffer(struct dentry * dentry, struct sysfs_buffer * buffer, size_t
{
struct sysfs_dirent *attr_sd = dentry->d_fsdata;
struct kobject *kobj = attr_sd->s_parent->s_dir.kobj;
- struct sysfs_ops * ops = buffer->ops;
+ const struct sysfs_ops * ops = buffer->ops;
int rc;
/* need attr_sd for attr and ops, its parent for kobj */
@@ -335,7 +335,7 @@ static int sysfs_open_file(struct inode *inode, struct file *file)
struct sysfs_dirent *attr_sd = file->f_path.dentry->d_fsdata;
struct kobject *kobj = attr_sd->s_parent->s_dir.kobj;
struct sysfs_buffer *buffer;
- struct sysfs_ops *ops;
+ const struct sysfs_ops *ops;
int error = -EACCES;
char *p;