[pso] Errata - Lab04

[Marian Mihailescu]

Ba eu zic ca vroiai sa atragi atentia.


-----Original Message-----
From: pso-admin@cursuri.cs.pub.ro [mailto:pso-admin@cursuri.cs.pub.ro] On
Behalf Of Andrei Costin
Sent: Tuesday, March 23, 2004 2:31 AM
To: pso@cursuri.cs.pub.ro
Subject: [pso] Errata - Lab04

Buna "(ziua)|(noapte): (your_sys_date)&(mailer_time_stamp)" (by Makefile :D
)!

Citind doc-lab4, mi-au parut ciudate urmatoarele lucruri. Daca nu am
dreptate - sorry. Oricum, nu am postat doar ca sa atrag atentia, ci
pentru ca mereu optez pentru o documentatie completa si corecta :).

----------------------------------------------------------------------------
-----------
-SECTIUNEA Cozi de asteptare
  ESTE: wait_quit_head_t
  TREBUIE: wait_queue_head_t
----------------------------------------------------------------------------
-----------
-SECTIUNEA Exemplu de character device driver - in codul sursa expus, in
cadrul
functiei "static int case_open(struct inode *inode, struct file *file){...}"
,
avem secventa:
 ...
 file->private_data=kmalloc(...)
 memset(file->private_data,...)
 if (!file->private_data) {
               printk(KERN_ERR"case: out of kernel memory\n");
               return -ENOMEM;
        }
 ...
 Nu ar fi trebuit testat intai "if(!file->private_data)", dupa care sa
 urmeze "memset(file->private_data,...)" ?!
----------------------------------------------------------------------------
-----------
 
Best regards and respect,
 Andrei Costin (mailto:zveriu_biz@yahoo.com)

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