NR_syscalls macro holds the number of system call exist in SPARC architecture. This macro is currently the part of uapi/asm/unistd.h file. 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 number of system call information. So we have two option to update NR_syscalls value.
1. Update NR_syscalls in uapi/asm/unistd.h manually by counting the no.of system calls. No need to update NR_syscalls until we either add a new system call or delete an existing system call.
2. 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 moved the NR_syscalls macro from uapi/asm/unistd.h to asm/unistd.h. The macro name also changed form NR_syscalls to __NR_syscalls 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.
Signed-off-by: Firoz Khan firstname.lastname@example.org --- arch/sparc/include/asm/unistd.h | 2 ++ arch/sparc/include/uapi/asm/unistd.h | 2 +- 2 files changed, 3 insertions(+), 1 deletion(-)
diff --git a/arch/sparc/include/asm/unistd.h b/arch/sparc/include/asm/unistd.h index f120b6b..c8849b7 100644 --- a/arch/sparc/include/asm/unistd.h +++ b/arch/sparc/include/asm/unistd.h @@ -17,6 +17,8 @@
+#define NR_syscalls __NR_syscalls + #ifndef __32bit_syscall_numbers__ #ifndef __arch64__ #define __32bit_syscall_numbers__ diff --git a/arch/sparc/include/uapi/asm/unistd.h b/arch/sparc/include/uapi/asm/unistd.h index ccf4bea..e2407b4 100644 --- a/arch/sparc/include/uapi/asm/unistd.h +++ b/arch/sparc/include/uapi/asm/unistd.h @@ -422,6 +422,6 @@ #define __NR_pwritev2 359 #define __NR_statx 360
-#define NR_syscalls 361 +#define __NR_syscalls 361
#endif /* _UAPI_SPARC_UNISTD_H */