scsi_dev_init who is calling & where its defined?

scsi_dev_init who is calling & where its defined?

[Kousalya K]

Hi all,

I'm trying to find out how linux kernel calls scsi_dev_init  function
after kernel image is loaded.
I got information  from web that , the sequence is,

"init() will call do_basic_setup() which inturn will call
        device_setup()-> scsi_dev_init()->scsi_init()"

/* init() and device_setup() are definied in main.c */

But I'm not able to find out the function call for device_setup()
(defined in /usr/src/linux-2.4.2/drivers/char/pcmcia/serial_ cb.c)
function from  do_basic_setup() function.

device_setup function is not at all calling any scsi related functions.

Could anyone please tell me the flow of how scsi_dev_init is called,
which inturn call what are all the functions?

Could you please provide the the location of the file where the
scsi_dev_init  and  scsi_init function is defined?


/* In  linux-2.4.9 kernel, I'm not able to find  out function
device_setup and also the file serial_cb.c
Any ideas?  */

Thanks ,
Kousalya

Re: scsi_dev_init who is calling & where its defined?

[rddunlap]

On Mon, 3 Dec 2001, Kousalya K wrote:

| Hi all,
|
| I'm trying to find out how linux kernel calls scsi_dev_init  function
| after kernel image is loaded.
| I got information  from web that , the sequence is,

What web page/URL?  What Linux kernel version is it for?
I'm just guessing that it's out of date.

| "init() will call do_basic_setup() which inturn will call
|         device_setup()-> scsi_dev_init()->scsi_init()"
|
| /* init() and device_setup() are definied in main.c */

init() calls do_basic_setup(), which calls do_initcalls(),
which calls all module_init() functions for "modules"
that are built into the kernel, including scsi_init() if
SCSI is built into the kernel (instead of being a loadable
module).

| But I'm not able to find out the function call for device_setup()
| (defined in /usr/src/linux-2.4.2/drivers/char/pcmcia/serial_ cb.c)
| function from  do_basic_setup() function.
|
| device_setup function is not at all calling any scsi related functions.

Yes, there are some (other) device_setup() functions: pcmcia serial
and wanrouter, but not in scsi.

| Could anyone please tell me the flow of how scsi_dev_init is called,
| which inturn call what are all the functions?

Above, except omitting "scsi_dev_init".

| Could you please provide the the location of the file where the
| scsi_dev_init  and  scsi_init function is defined?

scsi_dev_init() doesn't seem to exist (in 2.4.16).
scsi_init() is in linux/drivers/scsi/scsi.c .

| /* In  linux-2.4.9 kernel, I'm not able to find  out function
| device_setup and also the file serial_cb.c
| Any ideas?  */

-- 
~Randy

Any idea about watchdog timer in linux

[Kousalya K]

Hi all,

I wanted to call a timer function to get current time within kernel space. I
don't want any function call to do this.
Any idea ? In AIX we have watchdog stucture and w_stop, w_start, w_init
functions are there to stop, initiate and  start the watchdog timer.
Anything like that is available in linux?

TIA,
Kousalya.

Re: Any idea about watchdog timer in linux

[george anzinger]

Kousalya K wrote:
> 
> Hi all,
> 
> I wanted to call a timer function to get current time within kernel space. I
> don't want any function call to do this.
> Any idea ? In AIX we have watchdog stucture and w_stop, w_start, w_init
> functions are there to stop, initiate and  start the watchdog timer.
> Anything like that is available in linux?
> 
I think you are after the add_timer()  del_timer_sync() stuff.  These
timers are in units of HZ and cause a function to be called when they
expire.  Most of them are deleted prior to expire time.
-- 
George           george@mvista.com
High-res-timers: http://sourceforge.net/projects/high-res-timers/
Real time sched: http://sourceforge.net/projects/rtsched/