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authorFiroz Khan <firoz.khan@linaro.org>2018-12-17 16:10:32 +0530
committerMichael Ellerman <mpe@ellerman.id.au>2018-12-21 14:46:50 +1100
commit8a19eeeab66dfdd7c67bc8e3048ac0064e8943d7 (patch)
treea6409f2213fb39f917deeddb35ddc32e78ad839a
parent2cd4bd192ee94848695c1c052d87913260e10f36 (diff)
downloadlinux-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.h3
-rw-r--r--arch/powerpc/include/uapi/asm/unistd.h5
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_ */