On Thu, Sep 20, 2018 at 5:06 PM Firoz Khan firoz.khan@linaro.org wrote:
NR_syscalls macro holds the number of system call exist in m68k architecture. This macro is currently the part of asm/unistd.h file. We have to change the value of NR_syscalls, if we add or delete a system call.
One of patch in this patch series has a script which will generate a uapi header based on syscall.tbl file. The syscall.tbl file contains the number of system call information. So we have two option to update NR_syscalls value.
Update NR_syscalls in asm/unistd.h manually by counting the no.of system calls. No need to update NR_syscalls untill we either add a new system call or delete an existing system call.
We can keep this feature it above mentioned script, that'll count the number of syscalls and keep it in a generated file. In this case we don't need to explicitly update NR_syscalls in asm/unistd.h file.
The 2nd option will be the recommended one. For that, I come up with another macro - __NR_syscalls which will be updated by the script and it will be present in api/asm/unistd.h. While __NR_syscalls isn't strictly part of the uapi, having it as part of the generated header to simplifies the implementation. So we need to enclose this macro with #ifdef __KERNEL__ to avoid side effects.
Signed-off-by: Firoz Khan firoz.khan@linaro.org
Reviewed-by: Geert Uytterhoeven geert@linux-m68k.org
Gr{oetje,eeting}s,
Geert