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[103.229.18.19]) by smtp.gmail.com with ESMTPSA id u6sm19902462pgr.79.2018.11.13.01.32.33 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Tue, 13 Nov 2018 01:32:38 -0800 (PST) From: Firoz Khan To: linux-alpha@vger.kernel.org, Richard Henderson , Ivan Kokshaysky , Matt Turner , Thomas Gleixner , Greg Kroah-Hartman , Philippe Ombredanne , Kate Stewart Cc: y2038@lists.linaro.org, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, arnd@arndb.de, deepa.kernel@gmail.com, marcin.juszkiewicz@linaro.org, firoz.khan@linaro.org Subject: [PATCH v3 3/5] alpha: add __NR_syscalls along with NR_SYSCALLS Date: Tue, 13 Nov 2018 15:01:51 +0530 Message-Id: <1542101513-22010-4-git-send-email-firoz.khan@linaro.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1542101513-22010-1-git-send-email-firoz.khan@linaro.org> References: <1542101513-22010-1-git-send-email-firoz.khan@linaro.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org NR_SYSCALLS macro holds the number of system call exist in alpha 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- CALLS 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 --- arch/alpha/include/asm/unistd.h | 2 +- arch/alpha/include/uapi/asm/unistd.h | 4 ++++ 2 files changed, 5 insertions(+), 1 deletion(-) -- 1.9.1 diff --git a/arch/alpha/include/asm/unistd.h b/arch/alpha/include/asm/unistd.h index 4f0ceb3..21b706a 100644 --- a/arch/alpha/include/asm/unistd.h +++ b/arch/alpha/include/asm/unistd.h @@ -4,7 +4,7 @@ #include -#define NR_SYSCALLS 523 +#define NR_SYSCALLS __NR_syscalls #define __ARCH_WANT_NEW_STAT #define __ARCH_WANT_OLD_READDIR diff --git a/arch/alpha/include/uapi/asm/unistd.h b/arch/alpha/include/uapi/asm/unistd.h index 47c65f1..ab40aa6 100644 --- a/arch/alpha/include/uapi/asm/unistd.h +++ b/arch/alpha/include/uapi/asm/unistd.h @@ -465,4 +465,8 @@ #define __NR_pwritev2 521 #define __NR_statx 522 +#ifdef __KERNEL__ +#define __NR_syscalls 523 +#endif + #endif /* _UAPI_ALPHA_UNISTD_H */