C++ (Cpp) PageTestandSetSwapCache Examples

Example #1

int add_to_swap_cache(struct page *page, unsigned long entry)
{
#ifdef SWAP_CACHE_INFO
	swap_cache_add_total++;
#endif
#ifdef DEBUG_SWAP
	printk("DebugVM: add_to_swap_cache(%08lx count %d, entry %08lx)\n",
	       page_address(page), atomic_read(&page->count), entry);
#endif
	if (PageTestandSetSwapCache(page)) {
		printk(KERN_ERR "swap_cache: replacing non-empty entry %08lx "
		       "on page %08lx\n",
		       page->offset, page_address(page));
		return 0;
	}
	if (page->inode) {
		printk(KERN_ERR "swap_cache: replacing page-cached entry "
		       "on page %08lx\n", page_address(page));
		return 0;
	}
	atomic_inc(&page->count);
	page->inode = &swapper_inode;
	page->offset = entry;
	add_page_to_hash_queue(page, &swapper_inode, entry);
	add_page_to_inode_queue(&swapper_inode, page);
	return 1;
}

Example #2

File: swap_state.c Project: dmgerman/original

void add_to_swap_cache(struct page *page, swp_entry_t entry)
{
	unsigned long flags;

#ifdef SWAP_CACHE_INFO
	swap_cache_add_total++;
#endif
	if (!PageLocked(page))
		BUG();
	if (PageTestandSetSwapCache(page))
		BUG();
	if (page->mapping)
		BUG();
	flags = page->flags & ~((1 << PG_error) | (1 << PG_arch_1));
	page->flags = flags | (1 << PG_uptodate);
	add_to_page_cache_locked(page, &swapper_space, entry.val);
}