add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/arch/mips/kernel/signal32.c
..
..
@@ -46,7 +46,7 @@
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 		old_sigset_t mask;
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 		s32 handler;
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-		if (!access_ok(VERIFY_READ, act, sizeof(*act)))
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+		if (!access_ok(act, sizeof(*act)))
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 			return -EFAULT;
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 		err |= __get_user(handler, &act->sa_handler);
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 		new_ka.sa.sa_handler = (void __user *)(s64)handler;
..
..
@@ -61,7 +61,7 @@
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 	ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
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 	if (!ret && oact) {
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-		if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)))
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+		if (!access_ok(oact, sizeof(*oact)))
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 			return -EFAULT;
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 		err |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
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 		err |= __put_user((u32)(u64)old_ka.sa.sa_handler,