sparc: add __NR_syscalls along with NR_syscalls

NR_syscalls macro holds the number of system call exist
in sparc 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.h along
with NR_syscalls asm/unistd.h. The macro __NR_syscalls
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@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Firoz Khan 2018-11-14 10:56:29 +05:30 committed by David S. Miller
parent d441f93dd0
commit 61257f56ad
2 changed files with 5 additions and 1 deletions

View File

@ -17,6 +17,8 @@
#include <uapi/asm/unistd.h>
#define NR_syscalls __NR_syscalls
#ifdef __32bit_syscall_numbers__
#else
#define __NR_time 231 /* Linux sparc32 */

View File

@ -429,7 +429,9 @@
#define __NR_statx 360
#define __NR_io_pgetevents 361
#define NR_syscalls 362
#ifdef __KERNEL__
#define __NR_syscalls 362
#endif
/* Bitmask values returned from kern_features system call. */
#define KERN_FEATURE_MIXED_MODE_STACK 0x00000001