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authorPavel Emelyanov <xemul@openvz.org>2009-02-04 13:40:31 +0300
committerIngo Molnar <mingo@elte.hu>2009-02-05 01:04:16 +0100
commita6a95406c676ffe4f9dee708eb404a17c69f7fdd (patch)
treed38f5d1e266024e6df16f5499609ab8711b71d27 /arch/mips/kernel/head.S
parentb1792e367053968f2ddb48bc911d314143ce6242 (diff)
x86: fix hpet timer reinit for x86_64
There's a small problem with hpet_rtc_reinit function - it checks for the: hpet_readl(HPET_COUNTER) - hpet_t1_cmp > 0 to continue increasing both the HPET_T1_CMP (register) and the hpet_t1_cmp (variable). But since the HPET_COUNTER is always 32-bit, if the hpet_t1_cmp is 64-bit this condition will always be FALSE once the latter hits the 32-bit boundary, and we can have a situation, when we don't increase the HPET_T1_CMP register high enough. The result - timer stops ticking, since HPET_T1_CMP becomes less, than the COUNTER and never increased again. The solution is (based on Linus's suggestion) to not compare 64-bits (on 64-bit x86), but to do the comparison on 32-bit signed integers. Reported-by: Kirill Korotaev <dev@openvz.org> Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/mips/kernel/head.S')
0 files changed, 0 insertions, 0 deletions