Hi everyone,
>From what I read in drivers/mtd/chips/chipreg.c, unregister_mtd_chip_driver
would disable preemptiveness, and do a spin_lock, and then remove drv->list
by repointing the previous and next nodes, and then do a spin_unlock.
However, from what I noticed in drivers/mtd/chips/sharp.c, it does a
unregister_mtd_chip_driver(&sharp_chipdrv), which looks all right, but the
sharp_chipdrv static structure did not initialise the struct list_head list entry in
struct mtd_chip_driver.
/* drivers/mtd/chips/sharp.c */
100: static struct mtd_chip_driver sharp_chipdrv = {
101: .probe = sharp_probe,
102: .destroy = sharp_destroy,
103: .name = "sharp",
104: .module = THIS_MODULE
105: };
/* include/linux/list.h */
136 static inline void list_del(struct list_head *entry)
137 {
138 __list_del(entry->prev, entry->next);
139 }
/* include/linux/list.h */
124 static inline void __list_del(struct list_head * prev, struct list_head * next)
125 {
126 next->prev = prev;
127 prev->next = next;
128 }
What would list_del do? Since it does not check if entry is NULL. Please
enlighten!
Using kernel 2.5.68 on x86.
Cheers,
Eugene
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