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| author | Firoz Khan <firoz.khan@linaro.org> | 2018-11-13 12:27:42 +0530 |
|---|---|---|
| committer | Tony Luck <tony.luck@intel.com> | 2018-11-13 08:56:06 -0800 |
| commit | d7c5e82c08a0fb8b8d5186cdcb6d2c54ada4076b (patch) | |
| tree | fd88c611554d7904f6d4cccc965fb64748641e47 /arch/ia64/include | |
| parent | d272a735ef54bf0fbf62673f160bd3d335d1a510 (diff) | |
| download | lwn-d7c5e82c08a0fb8b8d5186cdcb6d2c54ada4076b.tar.gz lwn-d7c5e82c08a0fb8b8d5186cdcb6d2c54ada4076b.zip | |
ia64: add __NR_syscalls along with NR_syscalls
NR_syscalls macro holds the number of system call exist
in ia64 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: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'arch/ia64/include')
| -rw-r--r-- | arch/ia64/include/asm/unistd.h | 4 | ||||
| -rw-r--r-- | arch/ia64/include/uapi/asm/unistd.h | 4 |
2 files changed, 5 insertions, 3 deletions
diff --git a/arch/ia64/include/asm/unistd.h b/arch/ia64/include/asm/unistd.h index 49e34db2529c..0b08ebd2dfde 100644 --- a/arch/ia64/include/asm/unistd.h +++ b/arch/ia64/include/asm/unistd.h @@ -10,9 +10,7 @@ #include <uapi/asm/unistd.h> - - -#define NR_syscalls 326 /* length of syscall table */ +#define NR_syscalls __NR_syscalls /* length of syscall table */ /* * The following defines stop scripts/checksyscalls.sh from complaining about diff --git a/arch/ia64/include/uapi/asm/unistd.h b/arch/ia64/include/uapi/asm/unistd.h index 94b835cc4f11..388ab4e23a18 100644 --- a/arch/ia64/include/uapi/asm/unistd.h +++ b/arch/ia64/include/uapi/asm/unistd.h @@ -341,4 +341,8 @@ #define __NR_preadv2 1348 #define __NR_pwritev2 1349 +#ifdef __KERNEL__ +#define __NR_syscalls 326 +#endif + #endif /* _UAPI_ASM_IA64_UNISTD_H */ |