btrfs: fixup/remove module.h usage as required

[deliverable/linux.git] / fs / btrfs / extent_io.c

diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 597ab8966c80fc90efd25e66834c23f30e103b0f..f173c5af64610de66597cce1e38ac493729d6125 100644 (file)
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -4,7 +4,6 @@
 #include <linux/mm.h>
 #include <linux/pagemap.h>
 #include <linux/page-flags.h>
-#include <linux/module.h>
 #include <linux/spinlock.h>
 #include <linux/blkdev.h>
 #include <linux/swap.h>
@@ -3981,8 +3980,6 @@ static void __free_extent_buffer(struct extent_buffer *eb)
        list_del(&eb->leak_list);
        spin_unlock_irqrestore(&leak_lock, flags);
 #endif
-       if (eb->pages && eb->pages != eb->inline_pages)
-               kfree(eb->pages);
        kmem_cache_free(extent_buffer_cache, eb);
 }
 
@@ -4023,19 +4020,12 @@ static struct extent_buffer *__alloc_extent_buffer(struct extent_io_tree *tree,
        atomic_set(&eb->refs, 1);
        atomic_set(&eb->io_pages, 0);
 
-       if (len > MAX_INLINE_EXTENT_BUFFER_SIZE) {
-               struct page **pages;
-               int num_pages = (len + PAGE_CACHE_SIZE - 1) >>
-                       PAGE_CACHE_SHIFT;
-               pages = kzalloc(num_pages, mask);
-               if (!pages) {
-                       __free_extent_buffer(eb);
-                       return NULL;
-               }
-               eb->pages = pages;
-       } else {
-               eb->pages = eb->inline_pages;
-       }
+       /*
+        * Sanity checks, currently the maximum is 64k covered by 16x 4k pages
+        */
+       BUILD_BUG_ON(BTRFS_MAX_METADATA_BLOCKSIZE
+               > MAX_INLINE_EXTENT_BUFFER_SIZE);
+       BUG_ON(len > MAX_INLINE_EXTENT_BUFFER_SIZE);
 
        return eb;
 }