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| author | Firoz Khan <firoz.khan@linaro.org> | 2018-11-14 07:32:08 +0300 |
|---|---|---|
| committer | Arnd Bergmann <arnd@arndb.de> | 2018-12-19 19:53:46 +0300 |
| commit | 8a79633b4928cbb7cb575aa62dda0c49d37c2387 (patch) | |
| tree | a5f05c30f89bb12a27feceb1191e421651f52e69 | |
| parent | 2e6e902d185027f8e3cb8b7305238f7e35d6a436 (diff) | |
| download | linux-8a79633b4928cbb7cb575aa62dda0c49d37c2387.tar.xz | |
sh: add __NR_syscalls along with NR_syscalls
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: Firoz Khan <firoz.khan@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
| -rw-r--r-- | arch/sh/include/asm/unistd.h | 2 | ||||
| -rw-r--r-- | arch/sh/include/uapi/asm/unistd_32.h | 4 | ||||
| -rw-r--r-- | arch/sh/include/uapi/asm/unistd_64.h | 4 |
3 files changed, 8 insertions, 2 deletions
diff --git a/arch/sh/include/asm/unistd.h b/arch/sh/include/asm/unistd.h index a99234b61051..a97f93ca3bd7 100644 --- a/arch/sh/include/asm/unistd.h +++ b/arch/sh/include/asm/unistd.h @@ -5,6 +5,8 @@ # include <asm/unistd_64.h> # endif +#define NR_syscalls __NR_syscalls + # define __ARCH_WANT_NEW_STAT # define __ARCH_WANT_OLD_READDIR # define __ARCH_WANT_OLD_STAT diff --git a/arch/sh/include/uapi/asm/unistd_32.h b/arch/sh/include/uapi/asm/unistd_32.h index 58f04cf3d1d9..31c85aa251ab 100644 --- a/arch/sh/include/uapi/asm/unistd_32.h +++ b/arch/sh/include/uapi/asm/unistd_32.h @@ -396,6 +396,8 @@ #define __NR_preadv2 381 #define __NR_pwritev2 382 -#define NR_syscalls 383 +#ifdef __KERNEL__ +#define __NR_syscalls 383 +#endif #endif /* __ASM_SH_UNISTD_32_H */ diff --git a/arch/sh/include/uapi/asm/unistd_64.h b/arch/sh/include/uapi/asm/unistd_64.h index 6f809a53aa24..75da54851f02 100644 --- a/arch/sh/include/uapi/asm/unistd_64.h +++ b/arch/sh/include/uapi/asm/unistd_64.h @@ -416,6 +416,8 @@ #define __NR_preadv2 392 #define __NR_pwritev2 393 -#define NR_syscalls 394 +#ifdef __KERNEL__ +#define __NR_syscalls 394 +#endif #endif /* __ASM_SH_UNISTD_64_H */ |