Hi,
If the check for "count >= SWAP_MAP_MAX" in __get_swap_page is true, we
will end up trying to unlock a not-yet-locked spinlock.
Here goes a patch to change this.
--- linux/mm/swapfile.c.orig Thu Jan 4 04:10:08 2001
+++ linux/mm/swapfile.c Thu Jan 4 04:10:12 2001
@@ -90,8 +90,12 @@
int type, wrapped = 0;
entry.val = 0; /* Out of memory */
- if (count >= SWAP_MAP_MAX)
- goto bad_count;
+ if (count >= SWAP_MAP_MAX) {
+ printk(KERN_ERR "get_swap_page: bad count %hd from %p\n",
+ count, __builtin_return_address(0));
+ return entry;
+ }
+
swap_list_lock();
type = swap_list.next;
if (type < 0)
@@ -130,11 +134,6 @@
out:
swap_list_unlock();
return entry;
-
-bad_count:
- printk(KERN_ERR "get_swap_page: bad count %hd from %p\n",
- count, __builtin_return_address(0));
- goto out;
}
-
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