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>		2008-02-13 13:29:25 -08:00
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asm-offsets.c
break.S	FRV: arrange things such that BRA can reach from the trap table	2007-11-29 09:24:54 -08:00
cmode.S
debug-stub.c
dma.c
entry-table.S
entry.S	timerfd: fix remaining architectures	2008-02-05 14:37:15 -08:00
frv_ksyms.c
futex.c
gdb-io.c
gdb-io.h
gdb-stub.c	Remove references to "make dep"	2008-01-28 23:22:13 +01:00
head-mmu-fr451.S
head-uc-fr401.S
head-uc-fr451.S
head-uc-fr555.S
head.inc
head.S
init_task.c
irq-mb93091.c
irq-mb93093.c
irq-mb93493.c
irq.c	spelling fixes: arch/frv/	2007-10-20 01:09:42 +02:00
kernel_execve.S
kernel_thread.S
local.h
Makefile
module.c
pm-mb93093.c
pm.c
process.c
ptrace.c
semaphore.c	spelling fixes: arch/frv/	2007-10-20 01:09:42 +02:00
setup.c	procfs: constify function pointer tables	2008-02-08 09:22:38 -08:00
signal.c
sleep.S
switch_to.S
sys_frv.c
sysctl.c
time.c	xtime_lock vs update_process_times	2008-02-13 13:29:25 -08:00
traps.c
uaccess.c
vmlinux.lds.S	FRV: Fix up parse error in linker script	2008-02-13 08:26:01 -08:00