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s390/traps: die on translation exceptions

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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>
This commit is contained in:
Heiko Carstens 2014-11-19 14:05:52 +01:00 committed by Martin Schwidefsky
parent 413d404768
commit e56da345eb
1 changed files with 6 additions and 2 deletions
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8
arch/s390/kernel/traps.c
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@ -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;