}
EXPORT_SYMBOL(kmap_to_page);
-static int flush_all_zero_pkmaps(void)
+static unsigned int flush_all_zero_pkmaps(void)
{
int i;
- int index = PKMAP_INDEX_INVAL;
+ unsigned int index = PKMAP_INVALID_INDEX;
flush_cache_kmaps();
&pkmap_page_table[i]);
set_page_address(page, NULL);
- index = i;
+ if (index == PKMAP_INVALID_INDEX)
+ index = i;
}
- if (index != PKMAP_INDEX_INVAL)
+ if (index != PKMAP_INVALID_INDEX)
flush_tlb_kernel_range(PKMAP_ADDR(0), PKMAP_ADDR(LAST_PKMAP));
return index;
*/
void kmap_flush_unused(void)
{
+ unsigned int index;
+
lock_kmap();
- flush_all_zero_pkmaps();
+ index = flush_all_zero_pkmaps();
+ if (index != PKMAP_INVALID_INDEX && (index < last_pkmap_nr))
+ last_pkmap_nr = index;
unlock_kmap();
}
static inline unsigned long map_new_virtual(struct page *page)
{
unsigned long vaddr;
- int index = PKMAP_INDEX_INVAL;
+ unsigned int index = PKMAP_INVALID_INDEX;
int count;
start:
last_pkmap_nr = (last_pkmap_nr + 1) & LAST_PKMAP_MASK;
if (!last_pkmap_nr) {
index = flush_all_zero_pkmaps();
- if (index != PKMAP_INDEX_INVAL)
- break; /* Found a usable entry */
+ break;
}
if (!pkmap_count[last_pkmap_nr]) {
index = last_pkmap_nr;
/*
* Sleep for somebody else to unmap their entries
*/
- if (index == PKMAP_INDEX_INVAL) {
+ if (index == PKMAP_INVALID_INDEX) {
DECLARE_WAITQUEUE(wait, current);
__set_current_state(TASK_UNINTERRUPTIBLE);
&(pkmap_page_table[index]), mk_pte(page, kmap_prot));
pkmap_count[index] = 1;
+ last_pkmap_nr = index;
set_page_address(page, (void *)vaddr);
return vaddr;
void *virtual;
struct list_head list;
};
+
static struct page_address_map page_address_maps[LAST_PKMAP];
/*