Yi Li 578d36f5e1 Blackfin: SMP: don't start up core b until its state has been completely onlined ... When testing PREEMPT_RT kernel on BF561-EZKit, the kernel blocks while booting. When the kernel initializes the ethernet driver, it sleeps and never wakes up. The issue happens when the kernel waits for a timer for Core B to timeout (the timers are per-cpu based: static DEFINE_PER_CPU(struct tvec_base *, tvec_bases) = &boot_tvec_bases). However, the ksoftirqd thread for Core B (note, the ksoftirqd thread is also per-cpu based) cannot work properly, and the timers for Core B never times out. When ksoftirqd() for the first time runs on core B, it is possible core A is still initializing core B (see smp_init() -> cpu_up() -> __cpu_up()). So the "cpu_is_offline()" check may return true and ksoftirqd moves to "wait_to_die". So delay the core b start up until the per-cpu timers have been set up fully. Signed-off-by: Yi Li <yi.li@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>		2009-12-15 00:16:09 -05:00
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boards	Blackfin: add support for the Acvilon BF561 board	2009-12-15 00:15:10 -05:00
include/mach	Blackfin: unify DMA masks	2009-12-15 00:14:59 -05:00
atomic.S	Blackfin: work around testset anomaly 05000477	2009-11-25 02:35:39 -05:00
coreb.c	Blackfin: coreb: switched to unlocked_ioctl	2009-12-15 00:14:21 -05:00
dma.c	Blackfin: mass clean up of copyright/licensing info	2009-10-07 04:36:26 -04:00
ints-priority.c	Blackfin: mass clean up of copyright/licensing info	2009-10-07 04:36:26 -04:00
Kconfig	Blackfin: add support for gptimer0 as a tick source	2009-06-12 06:11:37 -04:00
Makefile	Blackfin arch: fix bugs and unify BFIN_KERNEL_CLOCK option	2009-01-07 23:14:39 +08:00
secondary.S	Blackfin: mass clean up of copyright/licensing info	2009-10-07 04:36:26 -04:00
smp.c	Blackfin: SMP: don't start up core b until its state has been completely onlined	2009-12-15 00:16:09 -05:00