i'm currently writing a tutorial on sysfs and kobjects, and an early
section will explain where all the top level kobjects under /sys come
from. most of them are fairly obvious.
first, a lot of them are global kobjects, as in:
$ grep -r "struct kobject.*_kobj;" *
arch/x86/platform/uv/uv_sysfs.c:struct kobject *sgi_uv_kobj;
arch/x86/include/asm/uv/bios.h:extern struct kobject *sgi_uv_kobj; /* /sys/firmware/sgi_uv */
arch/s390/hypfs/inode.c:static struct kobject *s390_kobj;
arch/powerpc/platforms/pseries/power.c:struct kobject *power_kobj;
arch/powerpc/platforms/pseries/mobility.c:static struct kobject *mobility_kobj;
drivers/parisc/pdc_stable.c:static struct kobject *stable_kobj;
drivers/base/hypervisor.c:struct kobject *hypervisor_kobj;
drivers/base/core.c:static struct kobject *dev_kobj;
... snip ...
and the top-level objects have a common creation call:
$ grep -r "kobject_create_and_add.*NULL" *
arch/powerpc/platforms/pseries/power.c: power_kobj = kobject_create_and_add("power", NULL);
block/genhd.c: block_depr = kobject_create_and_add("block", NULL);
drivers/base/hypervisor.c: hypervisor_kobj = kobject_create_and_add("hypervisor", NULL);
drivers/base/core.c: dev_kobj = kobject_create_and_add("dev", NULL);
drivers/base/firmware.c: firmware_kobj = kobject_create_and_add("firmware", NULL);
drivers/staging/speakup/kobjects.c: accessibility_kobj = kobject_create_and_add("accessibility", NULL);
fs/namespace.c: fs_kobj = kobject_create_and_add("fs", NULL);
kernel/ksysfs.c: kernel_kobj = kobject_create_and_add("kernel", NULL);
kernel/power/main.c: power_kobj = kobject_create_and_add("power", NULL);
$
but i don't see the call that creates the kobject for "/sys/bus",
and i've poked around, checking other kobject creation variations.
any hints?
rday
--
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Robert P. J. Day Ottawa, Ontario, CANADA
http://crashcourse.ca
Twitter: http://twitter.com/rpjday
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