dict0dict.ic	Remove acquisition of the dictionary mutex: this may fix the hang observed by Peter Zaitsev
os0file.c	Use O_SYNC instead of O_DSYNC because in Linux there may be a bug


innobase/os/os0file.c:
  Use O_SYNC instead of O_DSYNC because in Linux there may be a bug
innobase/include/dict0dict.ic:
  Remove acquisition of the dictionary mutex: this may fix the hang observed by Peter Zaitsev