taglinefilesource code
newtime727fs/buffer.cint newtime;
newtime731fs/buffer.cnewtime = jiffies + (flag ? bdf_prm.b_un.age_super : 
newtime733fs/buffer.cif(!buf->b_flushtime || buf->b_flushtime > newtime)
newtime734fs/buffer.cbuf->b_flushtime = newtime;