Porting checkpoint system to arm

[Jerf gefera]

hi all,
I am porting checkpoint system to arm, it seems(because restarting is not
fine, i only can say it seems) that the checkpointing is fine, but when i
restart the process from image file, then error occurs.
The error is located in _cr_kread function in file sys.c, the return of
vfs_read() is 0. I do not know what is wrong, i hope you can point it out
for me.
Thank you very much!
best wishes,
fera