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| author | Firoz Khan <firoz.khan@linaro.org> | 2018-12-17 16:10:32 +0530 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-12-21 14:46:50 +1100 |
| commit | 8a19eeeab66dfdd7c67bc8e3048ac0064e8943d7 (patch) | |
| tree | a6409f2213fb39f917deeddb35ddc32e78ad839a | |
| parent | 2cd4bd192ee94848695c1c052d87913260e10f36 (diff) | |
| download | linux-8a19eeeab66dfdd7c67bc8e3048ac0064e8943d7.tar.bz2 | |
powerpc: add __NR_syscalls along with NR_syscalls
NR_syscalls macro holds the number of system call exist
in powerpc 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 number of system call
information. So we have two option to update NR_syscalls
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 in 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: Michael Ellerman <mpe@ellerman.id.au>
| -rw-r--r-- | arch/powerpc/include/asm/unistd.h | 3 | ||||
| -rw-r--r-- | arch/powerpc/include/uapi/asm/unistd.h | 5 |
2 files changed, 5 insertions, 3 deletions
diff --git a/arch/powerpc/include/asm/unistd.h b/arch/powerpc/include/asm/unistd.h index b0de85b477e1..a3c35e6d6ffb 100644 --- a/arch/powerpc/include/asm/unistd.h +++ b/arch/powerpc/include/asm/unistd.h @@ -11,8 +11,7 @@ #include <uapi/asm/unistd.h> - -#define NR_syscalls 389 +#define NR_syscalls __NR_syscalls #define __NR__exit __NR_exit diff --git a/arch/powerpc/include/uapi/asm/unistd.h b/arch/powerpc/include/uapi/asm/unistd.h index 985534d0b448..71958681a9ac 100644 --- a/arch/powerpc/include/uapi/asm/unistd.h +++ b/arch/powerpc/include/uapi/asm/unistd.h @@ -10,7 +10,6 @@ #ifndef _UAPI_ASM_POWERPC_UNISTD_H_ #define _UAPI_ASM_POWERPC_UNISTD_H_ - #define __NR_restart_syscall 0 #define __NR_exit 1 #define __NR_fork 2 @@ -401,4 +400,8 @@ #define __NR_rseq 387 #define __NR_io_pgetevents 388 +#ifdef __KERNEL__ +#define __NR_syscalls 389 +#endif + #endif /* _UAPI_ASM_POWERPC_UNISTD_H_ */ |