ext4: add some tracepoints in ext4/extents.c

This patch adds some tracepoints in ext4/extents.c and updates a tracepoint in
ext4/inode.c.

Tested: Built and ran the kernel and verified that these tracepoints work.
Also ran xfstests.

Signed-off-by: Aditya Kali <adityakali@google.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
    

diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 21ea65d..751277a 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -2339,4 +2339,6 @@
 
 #endif	/* __KERNEL__ */
 
+#include "ext4_extents.h"
+
 #endif	/* _EXT4_H */