#                                                                                                                                                     
# /etc/fstab                                                                                                                                          
#

debugfs 　　　　　　 /sys/kernel/debug                   debugfs     defaults,noauto                0 0       //挂载gpio-dubugfs相关 

none    　　　　　　   /sys/kernel/debug       　　　 debugfs     defaults                             0 0       //挂载mux-debugfs相关                                                                   
/dev/mmcblk0p1           /media/mmc           　　　　   vfat             defaults,sync                    0 0                                                          

am335x文件系统 /etc/fstab的设置