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authorFiroz Khan <firoz.khan@linaro.org>2018-11-13 12:31:51 +0300
committerMatt Turner <mattst88@gmail.com>2018-12-21 19:57:56 +0300
commitb67bfd298f4c7ab3762aebb354a0b16635c82211 (patch)
treed68e5ee2e452b5c8039c180352880ca010ecbb23 /arch/alpha
parentd8bf616be5f05b955d3ee32ad92d4cdb87e30349 (diff)
downloadlinux-b67bfd298f4c7ab3762aebb354a0b16635c82211.tar.xz
alpha: add __NR_syscalls along with NR_SYSCALLS
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 <firoz.khan@linaro.org> Signed-off-by: Matt Turner <mattst88@gmail.com>
Diffstat (limited to 'arch/alpha')
-rw-r--r--arch/alpha/include/asm/unistd.h2
-rw-r--r--arch/alpha/include/uapi/asm/unistd.h4
2 files changed, 5 insertions, 1 deletions
diff --git a/arch/alpha/include/asm/unistd.h b/arch/alpha/include/asm/unistd.h
index 4f0ceb336e23..21b706a5b772 100644
--- a/arch/alpha/include/asm/unistd.h
+++ b/arch/alpha/include/asm/unistd.h
@@ -4,7 +4,7 @@
#include <uapi/asm/unistd.h>
-#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 47c65f199ec7..ab40aa6c4898 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 */