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Heiko Carstens d911e03d09 s390/timer: avoid overflow when programming clock comparator ... Since ed4f209 "s390/time: fix sched_clock() overflow" a new helper function is used to avoid overflows when converting TOD format values to nanosecond values. The kvm interrupt code formerly however only worked by accident because of an overflow. It tried to program a timer that would expire in more than ~29 years. Because of the old TOD-to-nanoseconds overflow bug the real expiry value however was much smaller, but now it isn't anymore. This however triggers yet another bug in the function that programs the clock comparator s390_next_ktime(): if the absolute "expires" value is after 2042 this will result in an overflow and the programmed value is lower than the current TOD value which immediatly triggers a clock comparator (= timer) interrupt. Since the timer isn't expired it will be programmed immediately again and so on... the result is a dead system. To fix this simply program the maximum possible value if an overflow is detected. Reported-by: Christian Borntraeger <borntraeger@de.ibm.com> Tested-by: Christian Borntraeger <borntraeger@de.ibm.com> Cc: stable@vger.kernel.org # v3.3+ Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>		2013-01-31 14:01:52 +01:00
..
appldata	s390/vtimer: rework virtual timer interface	2012-07-20 11:15:08 +02:00
boot	s390: fix linker script for 31 bit builds	2012-10-18 17:50:10 +02:00
crypto	s390/crypto: Don't panic after crypto instruction failures	2012-11-23 11:14:27 +01:00
hypfs	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2012-10-02 20:25:04 -07:00
include	s390/thp: implement pmdp_set_wrprotect()	2013-01-22 13:32:16 +01:00
kernel	s390/timer: avoid overflow when programming clock comparator	2013-01-31 14:01:52 +01:00
kvm	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux	2013-01-17 08:56:30 -08:00
lib	s390/mm: use pmd_large() instead of pmd_huge()	2012-10-26 16:44:23 +02:00
math-emu	s390/comments: unify copyright messages and remove file names	2012-07-20 11:15:04 +02:00
mm	s390/irq: remove split irq fields from /proc/stat	2013-01-08 10:57:07 +01:00
net	s390/bpf,jit: add support for XOR instruction	2012-12-03 10:44:05 -05:00
oprofile	s390/irq: remove split irq fields from /proc/stat	2013-01-08 10:57:07 +01:00
pci	s390/irq: remove split irq fields from /proc/stat	2013-01-08 10:57:07 +01:00
Kbuild	s390/pci: base support	2012-11-30 15:40:45 +01:00
Kconfig	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal	2012-12-20 18:05:28 -08:00
Kconfig.debug	s390/mm: add page table dumper	2012-10-09 14:16:58 +02:00
Makefile	s390: use -fPIC for module compile	2013-01-12 18:49:26 +01:00
defconfig	s390: update defconfig	2012-09-26 15:45:29 +02:00