path: root/arch/sh/include
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authorFiroz Khan <firoz.khan@linaro.org>2018-11-14 10:02:08 +0530
committerArnd Bergmann <arnd@arndb.de>2018-12-19 17:53:46 +0100
commit8a79633b4928cbb7cb575aa62dda0c49d37c2387 (patch)
treea5f05c30f89bb12a27feceb1191e421651f52e69 /arch/sh/include
parentLinux 4.20-rc4 (diff)
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>
Diffstat (limited to 'arch/sh/include')
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
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 /* __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 /* __ASM_SH_UNISTD_64_H */