ext4: remove lock_buffer in bclean() and setup_new_group_blocks()
ext4: remove lock_buffer in bclean() and setup_new_group_blocks()

There is no need to lock the buffers since no one else should be
touching these buffers besides the file system.

Signed-off-by: Yongqiang Yang <cc47c8d45a0a3c6300393e2d0c4f6e661d0cfdb0@gmail.com>
Signed-off-by: "Theodore Ts'o" <4ed386e0495d3e109932df055831d9ec2f824927@mit.edu>

TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs