s390/traps: die on translation exceptions (e56da345) · Commits · 戴 / test

Translation exceptions should never happen, since that implies that either we screwed up the page tables or missed to properly flush the TLB. In both cases we should not just simply kill user space or walk the kernel exception tables. Instead an oops or a panic (panic_on_oops) is the better answer. Signed-off-by:

Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by:

Martin Schwidefsky <schwidefsky@de.ibm.com>

arch/s390/kernel/traps.c

+6 −2

Original line number	Diff line number	Diff line
		@@ -153,8 +153,6 @@ DO_ERROR_INFO(privileged_op, SIGILL, ILL_PRVOPC,
		"privileged operation")
		DO_ERROR_INFO(special_op_exception, SIGILL, ILL_ILLOPN,
		"special operation exception")
		DO_ERROR_INFO(translation_exception, SIGILL, ILL_ILLOPN,
		"translation exception")

		#ifdef CONFIG_64BIT
		DO_ERROR_INFO(transaction_exception, SIGILL, ILL_ILLOPN,
		@@ -181,6 +179,12 @@ static inline void do_fp_trap(struct pt_regs *regs, int fpc)
		do_trap(regs, SIGFPE, si_code, "floating point exception");
		}

		void translation_exception(struct pt_regs *regs)
		{
		/* May never happen. */
		die(regs, "Translation exception");
		}

		void illegal_op(struct pt_regs *regs)
		{
		siginfo_t info;

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