Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs...

[pandora-kernel.git] / fs / btrfs / extent_io.c

diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 0e0fe0f..7055d11 100644 (file)
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -10,6 +10,8 @@
 #include <linux/swap.h>
 #include <linux/writeback.h>
 #include <linux/pagevec.h>
+#include <linux/prefetch.h>
+#include <linux/cleancache.h>
 #include "extent_io.h"
 #include "extent_map.h"
 #include "compat.h"
@@ -1474,7 +1476,7 @@ u64 count_range_bits(struct extent_io_tree *tree,
                        if (total_bytes >= max_bytes)
                                break;
                        if (!found) {
-                               *start = state->start;
+                               *start = max(cur_start, state->start);
                                found = 1;
                        }
                        last = state->end;
@@ -1969,6 +1971,13 @@ static int __extent_read_full_page(struct extent_io_tree *tree,
 
        set_page_extent_mapped(page);
 
+       if (!PageUptodate(page)) {
+               if (cleancache_get_page(page) == 0) {
+                       BUG_ON(blocksize != PAGE_SIZE);
+                       goto out;
+               }
+       }
+
        end = page_end;
        while (1) {
                lock_extent(tree, start, end, GFP_NOFS);
@@ -2102,6 +2111,7 @@ static int __extent_read_full_page(struct extent_io_tree *tree,
                cur = cur + iosize;
                pg_offset += iosize;
        }
+out:
        if (!nr) {
                if (!PageError(page))
                        SetPageUptodate(page);