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authorIvan Kokshaysky <ink@jurassic.park.msu.ru>2005-06-30 20:02:18 +0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-06-30 22:29:48 -0700
commiteaf05be039cf5adfba5b1846452ce89646110fdb (patch)
treeda81bed900c4a80f53379feb2de477fc4047792c /fs
parent62351cc38d3eaf3de0327054dd6ebc039f4da80d (diff)
[PATCH] alpha smp fix
As usual, the reason of this breakage is quite silly: in do_entIF, we are checking for PS == 0 to see whether it was a kernel BUG() or userspace trap. It works, unless BUG() happens in interrupt - PS is not 0 in kernel mode due to non-zero IPL, and the things get messed up horribly then. In this particular case it was BUG_ON(!irqs_disabled()) triggered in run_posix_cpu_timers(), so we ended up shooting "current" with the bursts of one SIGTRAP and three SIGILLs on every timer tick. ;-)
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