diff options
author | Emese Revfy <re.emese@gmail.com> | 2010-01-19 02:58:23 +0100 |
---|---|---|
committer | Stephen Rothwell <sfr@canb.auug.org.au> | 2010-03-01 10:52:14 +1100 |
commit | c5bb233605d541086ac435a5c9831d1f476e6990 (patch) | |
tree | 968524433625a978ec52888ac65ea8e74c025c3e /block | |
parent | 65e34bf0cc260f80b91b96dd05ecf0d6b3928a6a (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 'block')
-rw-r--r-- | block/blk-integrity.c | 2 | ||||
-rw-r--r-- | block/blk-sysfs.c | 2 | ||||
-rw-r--r-- | block/elevator.c | 2 |
3 files changed, 3 insertions, 3 deletions
diff --git a/block/blk-integrity.c b/block/blk-integrity.c index 15c630813b1c..96e83c2bdb94 100644 --- a/block/blk-integrity.c +++ b/block/blk-integrity.c @@ -278,7 +278,7 @@ static struct attribute *integrity_attrs[] = { NULL, }; -static struct sysfs_ops integrity_ops = { +static const struct sysfs_ops integrity_ops = { .show = &integrity_attr_show, .store = &integrity_attr_store, }; diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c index 8606c9543fdd..f44375324884 100644 --- a/block/blk-sysfs.c +++ b/block/blk-sysfs.c @@ -447,7 +447,7 @@ static void blk_release_queue(struct kobject *kobj) kmem_cache_free(blk_requestq_cachep, q); } -static struct sysfs_ops queue_sysfs_ops = { +static const struct sysfs_ops queue_sysfs_ops = { .show = queue_attr_show, .store = queue_attr_store, }; diff --git a/block/elevator.c b/block/elevator.c index 9ad5ccc4c5ee..38e89204f207 100644 --- a/block/elevator.c +++ b/block/elevator.c @@ -883,7 +883,7 @@ elv_attr_store(struct kobject *kobj, struct attribute *attr, return error; } -static struct sysfs_ops elv_sysfs_ops = { +static const struct sysfs_ops elv_sysfs_ops = { .show = elv_attr_show, .store = elv_attr_store, }; |