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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 /include/linux/kobject.h
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 'include/linux/kobject.h')
-rw-r--r--include/linux/kobject.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/include/linux/kobject.h b/include/linux/kobject.h
index 57a1eaae9096..3950d3c2850d 100644
--- a/include/linux/kobject.h
+++ b/include/linux/kobject.h
@@ -106,7 +106,7 @@ extern char *kobject_get_path(struct kobject *kobj, gfp_t flag);
struct kobj_type {
void (*release)(struct kobject *kobj);
- struct sysfs_ops *sysfs_ops;
+ const struct sysfs_ops *sysfs_ops;
struct attribute **default_attrs;
};
@@ -132,7 +132,7 @@ struct kobj_attribute {
const char *buf, size_t count);
};
-extern struct sysfs_ops kobj_sysfs_ops;
+extern const struct sysfs_ops kobj_sysfs_ops;
/**
* struct kset - a set of kobjects of a specific type, belonging to a specific subsystem.