return 0;
}
+static struct page *squashfs_get_cache_page(struct address_space *mapping,
+ pgoff_t index)
+{
+ struct page *page;
+
+ if (!mapping)
+ return NULL;
+
+ page = find_get_page(mapping, index);
+ if (!page)
+ return NULL;
+
+ if (!PageUptodate(page)) {
+ put_page(page);
+ return NULL;
+ }
+
+ return page;
+}
+
static int squashfs_bio_read(struct super_block *sb, u64 index, int length,
struct bio **biop, int *block_offset)
{
for (i = 0; i < page_count; ++i) {
unsigned int len =
min_t(unsigned int, PAGE_SIZE - offset, total_len);
- struct page *page = NULL;
+ pgoff_t index = (read_start >> PAGE_SHIFT) + i;
+ struct page *page;
- if (cache_mapping)
- page = find_get_page(cache_mapping,
- (read_start >> PAGE_SHIFT) + i);
+ page = squashfs_get_cache_page(cache_mapping, index);
if (!page)
page = alloc_page(GFP_NOIO);