Hello,
I come back to you. The code of the module wdpiano is
the next one :
#include <linux/config.h>
#include <linux/module.h>
#include <linux/version.h>
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/miscdevice.h>
#include <linux/watchdog.h>
#include <linux/slab.h>
#include <linux/ioport.h>
#include <linux/fcntl.h>
#include <asm/io.h>
#include <asm/uaccess.h>
#include <asm/system.h>
#include <linux/notifier.h>
#include <linux/reboot.h>
#include <linux/init.h>
#define WDIO 0x443
#define WDIODIS 0x43
static int wdpiano_is_open=0; // le fichier driver
n'est pas ouvert
static unsigned char tempo=10; //temporisation de 10
second par défaut
MODULE_PARM(tempo, "b");
MODULE_PARM_DESC(tempo, "time-out period from 1s to
255s (default 10s)");
MODULE_AUTHOR("Massinissa AGOUDJIL RATP(R)
<[email protected]>");
MODULE_LICENSE("GPL");
static int wdpiano_open(struct inode *inode, struct
file *file) {
if (MINOR(inode->i_rdev)!=WATCHDOG_MINOR) return
-ENODEV;
// access exclusive au fichier de driver
if (wdpiano_is_open) return -EBUSY;
// Comptage du nombre de chargement
MOD_INC_USE_COUNT;
//Initialise le timeout
outb_p(tempo,WDIO);
printk("<1>wdpiano: initialised with a time-out of
%ds\n",tempo);
// limiter l'ouverture
wdpiano_is_open=1;
return 0;
}
static int wdpiano_release(struct inode *inode, struct
file *file) {
if (MINOR(inode->i_rdev)==WATCHDOG_MINOR) {
#ifndef CONFIG_WATCHDOG_NOWAYOUT
//désactiver le watchdog à la fermeture
inb_p(WDIO);
inb_p(WDIODIS);
#endif
wdpiano_is_open=0;
}
MOD_DEC_USE_COUNT;
return 0;
}
static ssize_t wdpiano_write(struct file *file, const
char *buf, size_t count, loff_t *ppos) {
if (ppos!=&file->f_pos)
return -ESPIPE;
if (count) {
//reinitialiser le timer du watchdog
inb_p(WDIODIS);
inb_p(WDIO);
return 1;
}
return 0;
}
//Un petit message!
static int wdpiano_notify_sys(struct notifier_block
*this, unsigned long code,
void *unused) {
if(code==SYS_DOWN || code==SYS_HALT) {
//désactiver le watchdog à la fermeture
inb_p(WDIO);
inb_p(WDIODIS);
}
return NOTIFY_DONE;
}
static struct file_operations wdpiano_fops = {
owner: THIS_MODULE,
// read: wdpiano_read,
write: wdpiano_write,
open: wdpiano_open,
release: wdpiano_release,
};
static struct miscdevice wdpiano_dev = {
WATCHDOG_MINOR, //fixer le mineur voir miscdevice.h
et devices.txt
"watchdog", //fixer le nom de fichier d'accee
&wdpiano_fops
};
static struct notifier_block wdpiano_notifier = {
wdpiano_notify_sys,
NULL,
0
};
int init_module(void)
{
int retval;
printk("Piano watchdog driver RATP(r) V1.0\n");
wdpiano_dev.fops = &wdpiano_fops;
// Allocation des ressources
register_reboot_notifier(&wdpiano_notifier);
// Enregistrement du module
retval = misc_register(&wdpiano_dev);
/* if (retval)
return retval;*/
return 0;
}
void cleanup_module(void)
{
printk("<1>wdpiano: cleanup_module\n");
// Suppression du module
misc_deregister(&wdpiano_dev);
//liberation des ressources
unregister_reboot_notifier(&wdpiano_notifier);
}
Thank's for your help.
Zine
--- Dirk Henning Gerdes <[email protected]> a écrit
:
> Hi Zine!
>
> That is not the point. But I suppose that the module
> which runs under
> 2.4.18 won't run under Linux 2.6. Or quite even
> under 2.4.32.
> That could cause some problems, either.
> If the vendor would give you a new version
> compatible to 2.6, you could
> update your whole kernel.
>
>
> Am Dienstag, den 06.12.2005, 11:35 +0100 schrieb
> zine el abidine Hamid:
> > Why? Do you think that the problem is the module
> > wdpiano?
> >
> > It's a small program which modify the Watch-Dog
> Timer
> > value only...
> >
> > --- Dirk Henning Gerdes <[email protected]> a
> écrit
> > :
> >
> > > Probably you can contact the manufactor of the
> board
> > > to get a driver for
> > > the watchdog, which runs under newer
> Linux-versions,
> > > if you really need
> > > the watchdog
> > > Am Montag, den 05.12.2005, 17:48 +0100 schrieb
> zine
> > > el abidine Hamid:
> > > >
> > > > I don't know if it's helpfull but the output
> of
> > > > ksymoops is :
> > > >
> > > > ksymoops 2.4.4 on i686 2.4.18-3. Options used
> > > > -V (default)
> > > > -k /proc/ksyms (default)
> > > > -l /proc/modules (default)
> > > > -o /lib/modules/2.4.18-3/ (default)
> > > > -m /boot/System.map-2.4.18-3 (default)
> > > >
> > > > Warning: You did not tell me where to find
> symbol
> > > > information. I will
> > > > assume that the log matches the kernel and
> modules
> > > > that are running
> > > > right now and I'll use the default options
> above
> > > for
> > > > symbol resolution.
> > > > If the current kernel and/or modules do not
> match
> > > the
> > > > log, you can get
> > > > more accurate output by telling me the kernel
> > > version
> > > > and where to find
> > > > map, modules, ksyms etc. ksymoops -h explains
> the
> > > > options.
> > > >
> > > > Error (expand_objects): cannot
> stat(/lib/ext3.o)
> > > for
> > > > ext3
> > > > ksymoops: No such file or directory
> > > > Error (expand_objects): cannot
> stat(/lib/jbd.o)
> > > for
> > > > jbd
> > > >
> > > > ....
> > > >
> > > >
> > > > Warning (compare_maps): parport symbol
> > > > parport_unregister_port not found in
> > > >
> > >
> >
>
/lib/modules/2.4.18-3/kernel/drivers/parport/parport.o.
> > > > Ignoring
> > > >
> > >
> >
>
/lib/modules/2.4.18-3/kernel/drivers/parport/parport.o
> > > > entry
> > > > Warning (compare_maps): parport symbol
> > > > parport_wait_event not found in
> > > >
> > >
> >
>
/lib/modules/2.4.18-3/kernel/drivers/parport/parport.o.
> > > > Ignoring
> > > >
> > >
> >
>
/lib/modules/2.4.18-3/kernel/drivers/parport/parport.o
> > > > entry
> > > > Warning (compare_maps): parport symbol
> > > > parport_wait_peripheral not found in
> > > >
> > >
> >
>
/lib/modules/2.4.18-3/kernel/drivers/parport/parport.o.
> > > > Ignoring
> > > >
> > >
> >
>
/lib/modules/2.4.18-3/kernel/drivers/parport/parport.o
> > > > entry
> > > > Warning (compare_maps): parport symbol
> > > parport_write
> > > > not found in
> > > >
> > >
> >
>
/lib/modules/2.4.18-3/kernel/drivers/parport/parport.o.
> > > > Ignoring
> > > >
> > >
> >
>
/lib/modules/2.4.18-3/kernel/drivers/parport/parport.o
> > > > entry
> > > > Warning (map_ksym_to_module): cannot match
> loaded
> > > > module ext3 to a unique module object. Trace
> may
> > > not
> > > > be reliable.
> > > > Warning (map_ksym_to_module): cannot match
> loaded
> > > > module jbd to a unique module object. Trace
> may
> > > not
> > > > be reliable.
> > > > Dec 1 14:54:58 Republique_ncl_a kernel:
> kernel
> > > BUG at
> > > > page_alloc.c:117!
> > > > Dec 1 14:54:58 Republique_ncl_a kernel:
> invalid
> > > > operand: 0000
> > > > Dec 1 14:54:58 Republique_ncl_a kernel: CPU:
> 0
> > > > Dec 1 14:54:58 Republique_ncl_a kernel: EIP:
>
> > > > 0010:[<c01316e7>] Not tainted
> > > >
> > > > Using defaults from ksymoops -t elf32-i386 -a
> i386
> > > > Dec 1 14:54:58 Republique_ncl_a kernel:
> EFLAGS:
> > > > 00010282
> > > > Dec 1 14:54:58 Republique_ncl_a kernel: eax:
> > > 00000020
> > > > ebx: c16502d8 ecx: 00000001 edx: 000019
> > > > Dec 1 14:54:58 Republique_ncl_a kernel: esi:
> > > 00000000
> > > > edi: 000001d0 ebp: 00000000 esp: c1755f
> > > > Dec 1 14:54:58 Republique_ncl_a kernel: ds:
> 0018
> > >
> > > > es: 0018 ss: 0018
> > > > Dec 1 14:54:58 Republique_ncl_a kernel:
> Process
> > > > kswapd (pid: 5, stackpage=c1755000)
> > > > Dec 1 14:54:58 Republique_ncl_a kernel:
> Stack:
> > > > c02250b5 00000075 c013d0e3 ddf7e600 c16502d8
> > > 000001d
> > > > Dec 1 14:54:58 Republique_ncl_a kernel:
>
> > > > c16502f4 c16502d8 c16502d8 000001d0 000001d0
> > > c012ff8
> > > > Dec 1 14:54:58 Republique_ncl_a kernel:
>
> > > > 00000125 c02c473c 00000c24 00000848 0000000f
> > > c013038
> > > > Dec 1 14:54:58 Republique_ncl_a kernel: Call
> > > Trace:
> > > > [<c013d0e3>] try_to_free_buffers [kernel] 0xb3
> > > > Dec 1 14:54:58 Republique_ncl_a kernel:
> > > [<c013b23a>]
> > > > try_to_release_page [kernel] 0x3a
> > > > Dec 1 14:54:58 Republique_ncl_a kernel:
> > > [<c012ff8b>]
> > > > page_launder_zone [kernel] 0x42b
> > > > Dec 1 14:54:58 Republique_ncl_a kernel:
> > > [<c0130388>]
> > > > page_launder [kernel] 0x168
> > > > Dec 1 14:54:58 Republique_ncl_a kernel:
> > > [<c0130c12>]
> > > > do_try_to_free_pages [kernel] 0x12
> > > > Dec 1 14:54:58 Republique_ncl_a kernel:
>
=== message truncated ===
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