How Access EMMC data in driver,When device booting?

Which system do you use? Android, Ubuntu, OOWOW or others?

**Android **

Which version of system do you use? Please provide the version of the system here:

**Android 13,Kernel 5.15**

Please describe your issue below:

**Hi,i need to read emmc data when device booting,but the follow functions are not available (vfs_open,vfs_read,vfs_write,kenel_read,kernel_write).Because they are not export at Kernel 5.15. Is there any other way to read EMMC? Thanks for your replay. **

Post a console log of your issue below:


**make: 'Image.gz' is up to date.
  MODPOST modules-only.symvers
ERROR: modpost: "filp_open" [common_drivers/drivers/media/aml_media.ko] undefined!
make[1]: *** [/home/xuzhiqiang/mee4k/common-5.15/common/scripts/Makefile.modpost:157: modules-only.symvers] Error 1
make[1]: *** Deleting file 'modules-only.symvers'
make: *** [/home/xuzhiqiang/mee4k/common-5.15/common/Makefile:1898: modules] Error 2
build kernel error**

@Android_Engineer
Can you provide more detailed information?
which SBC you are using?