remove __SYSCALL_SSLEN arch macro in favor of using public _NSIG

the issue at hand is that many syscalls require as an argument the
kernel-ABI size of sigset_t, intended to allow the kernel to switch to
a larger sigset_t in the future. previously, each arch was defining
this size in syscall_arch.h, which was redundant with the definition
of _NSIG in bits/signal.h. as it's used in some not-quite-portable
application code as well, _NSIG is much more likely to be recognized
and understood immediately by someone reading the code, and it's also
shorter and less cluttered.

note that _NSIG is actually 65/129, not 64/128, but the division takes
care of throwing away the off-by-one part.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/signal/sigtimedwait.c b/src/signal/sigtimedwait.c
index 4f8589b5..0739986b 100644
--- a/src/signal/sigtimedwait.c
+++ b/src/signal/sigtimedwait.c
@@ -7,7 +7,7 @@ int sigtimedwait(const sigset_t *restrict mask, siginfo_t *restrict si, const st
 {
 	int ret;
 	do ret = syscall_cp(SYS_rt_sigtimedwait, mask,
-		si, timeout, __SYSCALL_SSLEN);
+		si, timeout, _NSIG/8);
 	while (ret<0 && errno==EINTR);
 	return ret;
 }