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Commit e56da345 authored by Heiko Carstens's avatar Heiko Carstens Committed by Martin Schwidefsky
Browse files

s390/traps: die on translation exceptions 



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: default avatarHeiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent 413d4047

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;