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Subject[PATCH 2/4] sparc: Replace NR_SYSCALLS macro with __NR_SYSCALLS
Date
NR_syscalls macro holds the number of system call exist in SPARC
architecture. This macro is currently the part of uapi/asm/unistd.h
file. 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 uapi/asm/unistd.h manually by counting the
no.of system calls. No need to update NR_syscalls until we either
add a new system call or delete an existing system call.

2. We can keep this feature it above mentioned script, that'll
count the number of syscalls and keep it in a generated file.
In this case we don't need to explicitly update NR_syscalls
in asm/unistd.h file.

The 2nd option will be the recommended one. For that, I moved the
NR_syscalls macro from uapi/asm/unistd.h to asm/unistd.h. The macro
name also changed form NR_syscalls to __NR_syscalls 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.

Signed-off-by: Firoz Khan <firoz.khan@linaro.org>
---
arch/sparc/include/asm/unistd.h | 2 ++
arch/sparc/include/uapi/asm/unistd.h | 2 +-
2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/sparc/include/asm/unistd.h b/arch/sparc/include/asm/unistd.h
index f120b6b..c8849b7 100644
--- a/arch/sparc/include/asm/unistd.h
+++ b/arch/sparc/include/asm/unistd.h
@@ -17,6 +17,8 @@

#include <uapi/asm/unistd.h>

+#define NR_syscalls __NR_syscalls
+
#ifndef __32bit_syscall_numbers__
#ifndef __arch64__
#define __32bit_syscall_numbers__
diff --git a/arch/sparc/include/uapi/asm/unistd.h b/arch/sparc/include/uapi/asm/unistd.h
index ccf4bea..e2407b4 100644
--- a/arch/sparc/include/uapi/asm/unistd.h
+++ b/arch/sparc/include/uapi/asm/unistd.h
@@ -422,6 +422,6 @@
#define __NR_pwritev2 359
#define __NR_statx 360

-#define NR_syscalls 361
+#define __NR_syscalls 361

#endif /* _UAPI_SPARC_UNISTD_H */
--
1.9.1
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