Btrfs: Force inlining off in a few places to save stack usage

Signed-off-by: Chris Mason <chris.mason@oracle.com>

3 files changed, 54 insertions, 49 deletions

diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index 8fa92a2d9819..35c57074a376 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -548,8 +548,8 @@ static int check_leaf(struct btrfs_root *root, struct btrfs_path *path,
         return 0;
 }
 
-static int check_block(struct btrfs_root *root, struct btrfs_path *path,
-                        int level)
+static int noinline check_block(struct btrfs_root *root,
+                                struct btrfs_path *path, int level)
 {
         return 0;
 #if 0
@@ -676,8 +676,9 @@ static struct extent_buffer *read_node_slot(struct btrfs_root *root,
                        btrfs_level_size(root, btrfs_header_level(parent) - 1));
 }
 
-static int balance_level(struct btrfs_trans_handle *trans, struct btrfs_root
-                         *root, struct btrfs_path *path, int level)
+static int balance_level(struct btrfs_trans_handle *trans,
+                         struct btrfs_root *root,
+                         struct btrfs_path *path, int level)
 {
         struct extent_buffer *right = NULL;
         struct extent_buffer *mid;
@@ -868,9 +869,9 @@ enospc:
 }
 
 /* returns zero if the push worked, non-zero otherwise */
-static int push_nodes_for_insert(struct btrfs_trans_handle *trans,
-                                struct btrfs_root *root,
-                                struct btrfs_path *path, int level)
+static int noinline push_nodes_for_insert(struct btrfs_trans_handle *trans,
+                                          struct btrfs_root *root,
+                                          struct btrfs_path *path, int level)
 {
         struct extent_buffer *right = NULL;
         struct extent_buffer *mid;
@@ -1207,8 +1208,8 @@ static int fixup_low_keys(struct btrfs_trans_handle *trans,
  * returns 0 if some ptrs were pushed left, < 0 if there was some horrible
  * error, and > 0 if there was no room in the left hand block.
  */
-static int push_node_left(struct btrfs_trans_handle *trans, struct btrfs_root
-                          *root, struct extent_buffer *dst,
+static int push_node_left(struct btrfs_trans_handle *trans,
+                          struct btrfs_root *root, struct extent_buffer *dst,
                           struct extent_buffer *src)
 {
         int push_items = 0;
@@ -1309,7 +1310,7 @@ static int balance_node_right(struct btrfs_trans_handle *trans,
  *
  * returns zero on success or < 0 on failure.
  */
-static int insert_new_root(struct btrfs_trans_handle *trans,
+static int noinline insert_new_root(struct btrfs_trans_handle *trans,
                            struct btrfs_root *root,
                            struct btrfs_path *path, int level)
 {
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 54f2b1d8bdfd..4957cface9ab 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -162,10 +162,11 @@ struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
                 return block_group;
         return NULL;
 }
-static u64 find_search_start(struct btrfs_root *root,
-                             struct btrfs_block_group_cache **cache_ret,
-                             u64 search_start, int num,
-                             int data, int full_scan)
+
+static u64 noinline find_search_start(struct btrfs_root *root,
+                              struct btrfs_block_group_cache **cache_ret,
+                              u64 search_start, int num,
+                              int data, int full_scan)
 {
         int ret;
         struct btrfs_block_group_cache *cache = *cache_ret;
@@ -393,11 +394,12 @@ static int match_extent_ref(struct extent_buffer *leaf,
         return ret == 0;
 }
 
-static int lookup_extent_backref(struct btrfs_trans_handle *trans,
-                                 struct btrfs_root *root,
-                                 struct btrfs_path *path, u64 bytenr,
-                                 u64 root_objectid, u64 ref_generation,
-                                 u64 owner, u64 owner_offset, int del)
+static int noinline lookup_extent_backref(struct btrfs_trans_handle *trans,
+                                          struct btrfs_root *root,
+                                          struct btrfs_path *path, u64 bytenr,
+                                          u64 root_objectid,
+                                          u64 ref_generation, u64 owner,
+                                          u64 owner_offset, int del)
 {
         u64 hash;
         struct btrfs_key key;
@@ -1116,8 +1118,8 @@ int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
         return 0;
 }
 
-static int finish_current_insert(struct btrfs_trans_handle *trans, struct
-                                 btrfs_root *extent_root)
+static int finish_current_insert(struct btrfs_trans_handle *trans,
+                                 struct btrfs_root *extent_root)
 {
         u64 start;
         u64 end;
@@ -1360,11 +1362,13 @@ static u64 stripe_align(struct btrfs_root *root, u64 val)
  * ins->offset == number of blocks
  * Any available blocks before search_start are skipped.
  */
-static int find_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
-                            *orig_root, u64 num_bytes, u64 empty_size,
-                            u64 search_start, u64 search_end, u64 hint_byte,
-                            struct btrfs_key *ins, u64 exclude_start,
-                            u64 exclude_nr, int data)
+static int noinline find_free_extent(struct btrfs_trans_handle *trans,
+                                     struct btrfs_root *orig_root,
+                                     u64 num_bytes, u64 empty_size,
+                                     u64 search_start, u64 search_end,
+                                     u64 hint_byte, struct btrfs_key *ins,
+                                     u64 exclude_start, u64 exclude_nr,
+                                     int data)
 {
         struct btrfs_path *path;
         struct btrfs_key key;
@@ -1760,8 +1764,9 @@ struct extent_buffer *__btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
         return buf;
 }
 
-static int drop_leaf_ref(struct btrfs_trans_handle *trans,
-                         struct btrfs_root *root, struct extent_buffer *leaf)
+static int noinline drop_leaf_ref(struct btrfs_trans_handle *trans,
+                                  struct btrfs_root *root,
+                                  struct extent_buffer *leaf)
 {
         u64 leaf_owner;
         u64 leaf_generation;
@@ -1802,8 +1807,8 @@ static int drop_leaf_ref(struct btrfs_trans_handle *trans,
         return 0;
 }
 
-static void reada_walk_down(struct btrfs_root *root,
-                            struct extent_buffer *node)
+static void noinline reada_walk_down(struct btrfs_root *root,
+                                     struct extent_buffer *node)
 {
         int i;
         u32 nritems;
@@ -1835,8 +1840,9 @@ static void reada_walk_down(struct btrfs_root *root,
  * helper function for drop_snapshot, this walks down the tree dropping ref
  * counts as it goes.
  */
-static int walk_down_tree(struct btrfs_trans_handle *trans, struct btrfs_root
-                          *root, struct btrfs_path *path, int *level)
+static int noinline walk_down_tree(struct btrfs_trans_handle *trans,
+                                   struct btrfs_root *root,
+                                   struct btrfs_path *path, int *level)
 {
         u64 root_owner;
         u64 root_gen;
@@ -1955,8 +1961,9 @@ out:
  * to find the first node higher up where we haven't yet gone through
  * all the slots
  */
-static int walk_up_tree(struct btrfs_trans_handle *trans, struct btrfs_root
-                        *root, struct btrfs_path *path, int *level)
+static int noinline walk_up_tree(struct btrfs_trans_handle *trans,
+                                 struct btrfs_root *root,
+                                 struct btrfs_path *path, int *level)
 {
         u64 root_owner;
         u64 root_gen;
@@ -2100,7 +2107,8 @@ int btrfs_free_block_groups(struct btrfs_fs_info *info)
         return 0;
 }
 
-static int relocate_inode_pages(struct inode *inode, u64 start, u64 len)
+static int noinline relocate_inode_pages(struct inode *inode, u64 start,
+                                         u64 len)
 {
         u64 page_start;
         u64 page_end;
@@ -2169,7 +2177,7 @@ out_unlock:
 /*
  * note, this releases the path
  */
-static int relocate_one_reference(struct btrfs_root *extent_root,
+static int noinline relocate_one_reference(struct btrfs_root *extent_root,
                                   struct btrfs_path *path,
                                   struct btrfs_key *extent_key)
 {
@@ -2268,9 +2276,9 @@ out:
         return 0;
 }
 
-static int relocate_one_extent(struct btrfs_root *extent_root,
-                               struct btrfs_path *path,
-                               struct btrfs_key *extent_key)
+static int noinline relocate_one_extent(struct btrfs_root *extent_root,
+                                        struct btrfs_path *path,
+                                        struct btrfs_key *extent_key)
 {
         struct btrfs_key key;
         struct btrfs_key found_key;
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 71dc2d33b6c6..c9ebd4fe8f7e 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -80,7 +80,7 @@ static void btrfs_drop_pages(struct page **pages, size_t num_pages)
         }
 }
 
-static int insert_inline_extent(struct btrfs_trans_handle *trans,
+static int noinline insert_inline_extent(struct btrfs_trans_handle *trans,
                                 struct btrfs_root *root, struct inode *inode,
                                 u64 offset, size_t size,
                                 struct page **pages, size_t page_offset,
@@ -221,7 +221,7 @@ fail:
         return err;
 }
 
-static int dirty_and_release_pages(struct btrfs_trans_handle *trans,
+static int noinline dirty_and_release_pages(struct btrfs_trans_handle *trans,
                                    struct btrfs_root *root,
                                    struct file *file,
                                    struct page **pages,
@@ -653,14 +653,10 @@ out:
 /*
  * this gets pages into the page cache and locks them down
  */
-static int prepare_pages(struct btrfs_root *root,
-                         struct file *file,
-                         struct page **pages,
-                         size_t num_pages,
-                         loff_t pos,
-                         unsigned long first_index,
-                         unsigned long last_index,
-                         size_t write_bytes)
+static int prepare_pages(struct btrfs_root *root, struct file *file,
+                         struct page **pages, size_t num_pages,
+                         loff_t pos, unsigned long first_index,
+                         unsigned long last_index, size_t write_bytes)
 {
         int i;
         unsigned long index = pos >> PAGE_CACHE_SHIFT;