remove external __syscall function and last remaining users

the weak version of __syscall_cp_c was using a tail call to __syscall
to avoid duplicating the 6-argument syscall code inline in small
static-linked programs, but now that __syscall no longer exists, the
inline expansion is no longer duplication.

the syscall.h machinery suppported up to 7 syscall arguments, only via
an external __syscall function, but we presently have no syscall call
points that actually make use of that many, and the kernel only
defines 7-argument calling conventions for arm, powerpc (32-bit), and
sh. if it turns out we need them in the future, they can easily be
added.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/thread/__syscall_cp.c b/src/thread/__syscall_cp.c
index af666f06..42a01674 100644
--- a/src/thread/__syscall_cp.c
+++ b/src/thread/__syscall_cp.c
@@ -7,7 +7,7 @@ static long sccp(syscall_arg_t nr,
                  syscall_arg_t u, syscall_arg_t v, syscall_arg_t w,
                  syscall_arg_t x, syscall_arg_t y, syscall_arg_t z)
 {
-	return (__syscall)(nr, u, v, w, x, y, z);
+	return __syscall(nr, u, v, w, x, y, z);
 }
 
 weak_alias(sccp, __syscall_cp_c);