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Peter Zijlstra aa02cd2d9b xtime_lock vs update_process_times ... Commit d3d74453c3 ("hrtimer: fixup the HRTIMER_CB_IRQSAFE_NO_SOFTIRQ fallback") broke several archs, and since only Russell bothered to merge the fix, and Greg to ACK his arch, I'm sending this for merger. I have confirmation that the Alpha bit results in a booting kernel. That leaves: blackfin, frv, sh and sparc untested. The deadlock in question was found by Russell: IRQ handle -> timer_tick() - xtime seqlock held for write -> update_process_times() -> run_local_timers() -> hrtimer_run_queues() -> hrtimer_get_softirq_time() - tries to get a read lock Now, Thomas assures me the fix is trivial, only do_timer() needs to be done under the xtime_lock, and update_process_times() can savely be removed from under it. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Acked-by: Greg Ungerer <gerg@uclinux.org> CC: Richard Henderson <rth@twiddle.net> CC: Bryan Wu <bryan.wu@analog.com> CC: David Howells <dhowells@redhat.com> CC: Paul Mundt <lethal@linux-sh.org> CC: William Irwin <wli@holomorphy.com> Acked-by: Ingo Molnar <mingo@elte.hu> Acked-by: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		17 years ago
..
Makefile	…
asm-offsets.c	…
comempci.c	…
dma.c	…
entry.S	…
init_task.c	…
irq.c	…
m68k_ksyms.c	m68knommu: remove duplicate exports	17 years ago
module.c	…
process.c	m68knommu: include linux/fs.h for getname()	18 years ago
ptrace.c	…
semaphore.c	…
setup.c	procfs: constify function pointer tables	17 years ago
signal.c	m68knommu: fix syscall restart handling	18 years ago
sys_m68k.c	remove include/asm-*/ipc.h	18 years ago
syscalltable.S	timerfd: new timerfd API	17 years ago
time.c	xtime_lock vs update_process_times	17 years ago
traps.c	…
vmlinux.lds.S	all archs: consolidate init and exit sections in vmlinux.lds.h	17 years ago