diff options
| author | Christophe JAILLET <christophe.jaillet@wanadoo.fr> | 2023-07-08 12:13:45 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-08-05 08:31:41 +0200 |
| commit | f5992717b5826debc4aa58d4da6233563b139320 (patch) | |
| tree | 508161da0c47deed4d4fca91df1eb807c0786790 | |
| parent | 5d0c230f1de8c7515b6567d9afba1f196fb4e2f4 (diff) | |
kobject: Reorder fields in 'struct kobject'
Group some variables based on their sizes to reduce hole and avoid padding.
On x86_64, this shrinks the size of 'struct kobject' from 256 to 244 bytes.
This structure is often included in some other structures. So these other
structures will also benefit from this 8 bytes saving.
This is especially nice for structure like 'cma_kobject' or 'class_dir'
that are now 256 bytes long. When they are kzalloc()'ed, 256 bytes are
allocated, instead of 512.
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/r/6c7d1e3005dbec5483bdb9b7b60071175bf7bf70.1688811201.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | include/linux/kobject.h | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/include/linux/kobject.h b/include/linux/kobject.h index c392c811d9ad..c30affcc43b4 100644 --- a/include/linux/kobject.h +++ b/include/linux/kobject.h @@ -69,14 +69,16 @@ struct kobject { const struct kobj_type *ktype; struct kernfs_node *sd; /* sysfs directory entry */ struct kref kref; -#ifdef CONFIG_DEBUG_KOBJECT_RELEASE - struct delayed_work release; -#endif + unsigned int state_initialized:1; unsigned int state_in_sysfs:1; unsigned int state_add_uevent_sent:1; unsigned int state_remove_uevent_sent:1; unsigned int uevent_suppress:1; + +#ifdef CONFIG_DEBUG_KOBJECT_RELEASE + struct delayed_work release; +#endif }; __printf(2, 3) int kobject_set_name(struct kobject *kobj, const char *name, ...); |