Btrfs: Add debugging checks to track down corrupted metadata

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

1 files changed, 8 insertions, 7 deletions

diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index eb8e4556fa71..e9e86fbaa243 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -39,9 +39,10 @@
 #include "compat.h"
 
 
-static int btrfs_copy_from_user(loff_t pos, int num_pages, int write_bytes,
-                                struct page **prepared_pages,
-                                const char __user * buf)
+static int noinline btrfs_copy_from_user(loff_t pos, int num_pages,
+                                         int write_bytes,
+                                         struct page **prepared_pages,
+                                         const char __user * buf)
 {
         long page_fault = 0;
         int i;
@@ -69,7 +70,7 @@ static int btrfs_copy_from_user(loff_t pos, int num_pages, int write_bytes,
         return page_fault ? -EFAULT : 0;
 }
 
-static void btrfs_drop_pages(struct page **pages, size_t num_pages)
+static void noinline btrfs_drop_pages(struct page **pages, size_t num_pages)
 {
         size_t i;
         for (i = 0; i < num_pages; i++) {
@@ -359,7 +360,7 @@ out_unlock:
         return err;
 }
 
-int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end)
+int noinline btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end)
 {
         struct extent_map *em;
         struct extent_map *split = NULL;
@@ -515,7 +516,7 @@ out:
  * it is either truncated or split.  Anything entirely inside the range
  * is deleted from the tree.
  */
-int btrfs_drop_extents(struct btrfs_trans_handle *trans,
+int noinline btrfs_drop_extents(struct btrfs_trans_handle *trans,
                        struct btrfs_root *root, struct inode *inode,
                        u64 start, u64 end, u64 inline_limit, u64 *hint_byte)
 {
@@ -785,7 +786,7 @@ out:
 /*
  * this gets pages into the page cache and locks them down
  */
-static int prepare_pages(struct btrfs_root *root, struct file *file,
+static int noinline 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)