/*
* Called when the last reference to the mm
* is dropped: either by a lazy thread or by
* mmput. Free the page directory and the mm.
*/
inline void __mmdrop(struct mm_struct *mm)
{
if (mm->ioctx_list)
BUG();
if (mm == &init_mm) BUG();
pgd_free(mm->pgd);
destroy_context(mm);
free_mm(mm);
}
/*
* This function frees up all page tables of a process when it exits. It
* is the same as "clear_page_tables()", except it also changes the process'
* page table directory to the kernel page tables and then frees the old
* page table directory.
*/
void free_page_tables(struct mm_struct * mm)
{
int i;
pgd_t * page_dir;
page_dir = mm->pgd;
if (!page_dir || page_dir == swapper_pg_dir) {
printk("Trying to free kernel page-directory: not good\n");
return;
}
#ifndef CONFIG_BESTA
for (i = 0 ; i < USER_PTRS_PER_PGD ; i++)
free_one_pgd(page_dir + i);
#else
for (i = 0 ; i < PTRS_PER_PGD ; i++)
free_one_pgd(page_dir + i);
#endif
pgd_free(page_dir);
}
static inline void mm_free_pgd(struct mm_struct *mm)
{
#ifdef CONFIG_TIMA_RKP_DEBUG
int i;
#endif
pgd_free(mm, mm->pgd);
#ifdef CONFIG_TIMA_RKP_DEBUG
/* with debug infrastructure, check if a page was
* unprotected after being freed. Scream if not.
*/
#ifdef CONFIG_TIMA_RKP_L1_TABLES
for(i=0; i<4; i++) {
if (tima_debug_page_protection(((unsigned long)mm->pgd + i*0x1000), 5, 0) == 1) {
tima_debug_signal_failure(0x3f80f221, 5);
//tima_send_cmd((unsigned long)mm->pgd, 0x3f80e221);
//printk(KERN_ERR"TIMA: New L1 PGT still protected! mm_free_pgd\n");
}
}
#endif
#endif
}
static inline void mm_free_pgd(struct mm_struct * mm)
{
pgd_free(mm->pgd);
}