ext4: use unsigned int for es_status values

Don't use an unsigned long long for the es_status flags; this requires
that we pass 64-bit values around which is painful on 32-bit systems.
Instead pass the extent status flags around using the low 4 bits of an
unsigned int, and shift them into place when we are reading or writing
es_pblk.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Reviewed-by: Zheng Liu <wenqing.lz@taobao.com>
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index c2ca04e..0569c74 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -553,7 +553,7 @@
 	}
 	if (retval > 0) {
 		int ret;
-		unsigned long long status;
+		unsigned int status;
 
 		if (unlikely(retval != map->m_len)) {
 			ext4_warning(inode->i_sb,
@@ -653,7 +653,7 @@
 
 	if (retval > 0) {
 		int ret;
-		unsigned long long status;
+		unsigned int status;
 
 		if (unlikely(retval != map->m_len)) {
 			ext4_warning(inode->i_sb,
@@ -1633,7 +1633,7 @@
 		set_buffer_delay(bh);
 	} else if (retval > 0) {
 		int ret;
-		unsigned long long status;
+		unsigned int status;
 
 		if (unlikely(retval != map->m_len)) {
 			ext4_warning(inode->i_sb,