• Firoz Khan's avatar
    sh: add __NR_syscalls along with NR_syscalls · 8a79633b
    Firoz Khan authored
    NR_syscalls macro holds the number of system call exist
    in sh architecture. We have to change the value of NR-
    _syscalls, if we add or delete a system call.
    
    One of the 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 total number of system
    calls information. So we have two option to update NR_sy-
    scalls value.
    
    1. Update NR_syscalls in asm/unistd.h manually by count-
       ing the no.of system calls. No need to update NR_sys-
       calls until we either add a new system call or delete
       existing system call.
    
    2. We can keep this feature it above mentioned script,
       that will count the number of syscalls and keep it in
       a generated file. In this case we don't need to expli-
       citly update NR_syscalls in asm/unistd.h file.
    
    The 2nd option will be the recommended one. For that, I
    added the __NR_syscalls macro in uapi/asm/unistd_32/64.h
    along with NR_syscalls which is moved to asm/unistd.h.
    The macro __NR_syscalls also added for making the name
    convention same across all architecture. While __NR_sys-
    calls isn't strictly part of the uapi, having it as part
    of the generated header to simplifies the implementation.
    We also need to enclose this macro with #ifdef __KERNEL__
    to avoid side effects.
    Signed-off-by: default avatarFiroz Khan <firoz.khan@linaro.org>
    Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
    8a79633b
unistd_32.h 11.1 KB