__NR_syscall_count macro holds the number of system call exist in xtensa architecture. We have to change the value of __NR_syscall_count, 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- _syscall_count value. 1. Update __NR_syscall_count in asm/unistd.h manually by counting the no.of system calls. No need to update __NR- _syscall_count 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_syscall_count 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.h along with __NR_syscall_count asm/unistd.h. The macro __NR_sys- calls also added for making the name convention same across all architecture. While __NR_syscalls 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: Firoz Khan <firoz.khan@xxxxxxxxxx> --- arch/xtensa/include/asm/unistd.h | 2 ++ arch/xtensa/include/uapi/asm/unistd.h | 4 +++- 2 files changed, 5 insertions(+), 1 deletion(-) diff --git a/arch/xtensa/include/asm/unistd.h b/arch/xtensa/include/asm/unistd.h index 574e552..787987a 100644 --- a/arch/xtensa/include/asm/unistd.h +++ b/arch/xtensa/include/asm/unistd.h @@ -5,6 +5,8 @@ #define __ARCH_WANT_SYS_CLONE #include <uapi/asm/unistd.h> +#define __NR_syscall_count __NR_syscalls + #define __ARCH_WANT_NEW_STAT #define __ARCH_WANT_STAT64 #define __ARCH_WANT_SYS_UTIME diff --git a/arch/xtensa/include/uapi/asm/unistd.h b/arch/xtensa/include/uapi/asm/unistd.h index bc3f62d..332d67a 100644 --- a/arch/xtensa/include/uapi/asm/unistd.h +++ b/arch/xtensa/include/uapi/asm/unistd.h @@ -778,7 +778,9 @@ #define __NR_statx 351 __SYSCALL(351, sys_statx, 5) -#define __NR_syscall_count 352 +#ifdef __KERNEL__ +#define __NR_syscalls 352 +#endif /* * sysxtensa syscall handler -- 1.9.1
