btrfs: move inline function code to header file
When building btrfs from kernel code, it will report:
fs/btrfs/extent_io.h:281: warning: 'extent_buffer_page' declared inline after being called
fs/btrfs/extent_io.h:281: warning: previous declaration of 'extent_buffer_page' was here
fs/btrfs/extent_io.h:280: warning: 'num_extent_pages' declared inline after being called
fs/btrfs/extent_io.h:280: warning: previous declaration of 'num_extent_pages' was here
because of the wrong declaration of inline functions.
Signed-off-by: Robin Dong <sanbai@taobao.com>
diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h
index 7aeb310..711d12b 100644
--- a/fs/btrfs/extent_io.h
+++ b/fs/btrfs/extent_io.h
@@ -282,8 +282,18 @@
int read_extent_buffer_pages(struct extent_io_tree *tree,
struct extent_buffer *eb, u64 start, int wait,
get_extent_t *get_extent, int mirror_num);
-unsigned long num_extent_pages(u64 start, u64 len);
-struct page *extent_buffer_page(struct extent_buffer *eb, unsigned long i);
+
+static inline unsigned long num_extent_pages(u64 start, u64 len)
+{
+ return ((start + len + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT) -
+ (start >> PAGE_CACHE_SHIFT);
+}
+
+static inline struct page *extent_buffer_page(struct extent_buffer *eb,
+ unsigned long i)
+{
+ return eb->pages[i];
+}
static inline void extent_buffer_get(struct extent_buffer *eb)
{