[RFC v4 01/25] arch: add __SYSCALL_DEFINE_ARCH

[RFC v4 01/25] arch: add __SYSCALL_DEFINE_ARCH

[Hajime Tazaki]

From: Octavian Purdila <tavi.purdila@gmail.com>

This allows the architecture code to process the system call
definitions. It is used by LKL to create strong typed function
definitions for system calls.

Signed-off-by: Octavian Purdila <tavi.purdila@gmail.com>
Cc: linux-api@vger.kernel.org
---
 include/linux/syscalls.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index 1815065d52f3..e45815a3ee10 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -203,9 +203,14 @@ static inline int is_syscall_trace_event(struct trace_event_call *tp_event)
 }
 #endif
 
+#ifndef __SYSCALL_DEFINE_ARCH
+#define __SYSCALL_DEFINE_ARCH(x, sname, ...)
+#endif
+
 #ifndef SYSCALL_DEFINE0
 #define SYSCALL_DEFINE0(sname)					\
 	SYSCALL_METADATA(_##sname, 0);				\
+	__SYSCALL_DEFINE_ARCH(0, _##sname);			\
 	asmlinkage long sys_##sname(void);			\
 	ALLOW_ERROR_INJECTION(sys_##sname, ERRNO);		\
 	asmlinkage long sys_##sname(void)
@@ -222,6 +227,7 @@ static inline int is_syscall_trace_event(struct trace_event_call *tp_event)
 
 #define SYSCALL_DEFINEx(x, sname, ...)				\
 	SYSCALL_METADATA(sname, x, __VA_ARGS__)			\
+	__SYSCALL_DEFINE_ARCH(x, sname, __VA_ARGS__)		\
 	__SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
 
 #define __PROTECT(...) asmlinkage_protect(__VA_ARGS__)
-- 
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