Pull f2fs fixes from Jaegeuk Kim:
 "This set of patches adjust to follow recent setflags changes and fix
  two regressions"

* tag 'f2fs-for-5.4-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs:
  f2fs: use EINVAL for superblock with invalid magic
  f2fs: fix to read source block before invalidating it
  f2fs: remove redundant check from f2fs_setflags_common()
  f2fs: use generic checking function for FS_IOC_FSSETXATTR
  f2fs: use generic checking and prep function for FS_IOC_SETFLAGS