treewide: fix a few typos in comments

- kenrel -> kernel
- whetehr -> whether
- ttt -> tt
- sss -> ss

Signed-off-by: Justin P. Mattock <justinmattock@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index a37480a..d11ce613 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -1470,7 +1470,7 @@
 	 * file but the log buffers containing the free and reallocation
 	 * don't, then we'd end up with garbage in the blocks being freed.
 	 * As long as we make the new_size permanent before actually
-	 * freeing any blocks it doesn't matter if they get writtten to.
+	 * freeing any blocks it doesn't matter if they get written to.
 	 *
 	 * The callers must signal into us whether or not the size
 	 * setting here must be synchronous.  There are a few cases