On Wed, Jul 04, 2018 at 11:04:37PM +0200, Arnd Bergmann wrote: > Right, I do understand what it's used for, my point was that you > don't really need a separate system call number for it, just redirect > the entry point using the same trick that nds32 has in > arch/nds32/kernel/syscall_table.c: > > #define sys_fadvise64_64 csky_fadvise64_64 Thx for the tip :) Guo Ren