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authorEmese Revfy <re.emese@gmail.com>2010-01-18 20:58:23 -0500
committerGreg Kroah-Hartman <gregkh@suse.de>2010-03-07 20:04:49 -0500
commit52cf25d0ab7f78eeecc59ac652ed5090f69b619e (patch)
tree031d1ffb3890bd69c0260c864c512e0be62ac05c /fs/btrfs/sysfs.c
parent6c1733aca0b48db4d0e660d54976a1cca25b5eaf (diff)
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/btrfs/sysfs.c')
-rw-r--r--fs/btrfs/sysfs.c4
1 files changed, 2 insertions, 2 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)
164 complete(&root->kobj_unregister); 164 complete(&root->kobj_unregister);
165} 165}
166 166
167static struct sysfs_ops btrfs_super_attr_ops = { 167static const struct sysfs_ops btrfs_super_attr_ops = {
168 .show = btrfs_super_attr_show, 168 .show = btrfs_super_attr_show,
169 .store = btrfs_super_attr_store, 169 .store = btrfs_super_attr_store,
170}; 170};
171 171
172static struct sysfs_ops btrfs_root_attr_ops = { 172static const struct sysfs_ops btrfs_root_attr_ops = {
173 .show = btrfs_root_attr_show, 173 .show = btrfs_root_attr_show,
174 .store = btrfs_root_attr_store, 174 .store = btrfs_root_attr_store,
175}; 175};