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authorLinus Torvalds <torvalds@linux-foundation.org>2012-04-15 17:35:19 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-04-15 17:35:19 -0700
commit9a8e5d41124a7352e554581333d4d9689dc1526b (patch)
tree88e74fe2cdca5ca2d1d5424a728ade00a12f05d3 /arch/arm/kernel/smp_twd.c
parent12e993b89464707398e4209bd99983e376454985 (diff)
parent708e5978dfee0090a27c5531ce3b017dd6d190a2 (diff)
Merge branch 'fixes' of git://git.linaro.org/people/rmk/linux-arm
Pull ARM fixes from Russell King: "Nothing too disasterous, the biggest thing being the removal of the regulator support for vcore in the AMBA driver; only one SoC was using this and it got broken during the last merge window, which then started causing problems for other people. Mutual agreement was reached for it to be removed." * 'fixes' of git://git.linaro.org/people/rmk/linux-arm: ARM: 7386/1: jump_label: fixup for rename to static_key ARM: 7384/1: ThumbEE: Disable userspace TEEHBR access for !CONFIG_ARM_THUMBEE ARM: 7382/1: mm: truncate memory banks to fit in 4GB space for classic MMU ARM: 7359/2: smp_twd: Only wait for reprogramming on active cpus ARM: 7383/1: nommu: populate vectors page from paging_init ARM: 7381/1: nommu: fix typo in mm/Kconfig ARM: 7380/1: DT: do not add a zero-sized memory property ARM: 7379/1: DT: fix atags_to_fdt() second call site ARM: 7366/3: amba: Remove AMBA level regulator support ARM: 7377/1: vic: re-read status register before dispatching each IRQ handler ARM: 7368/1: fault.c: correct how the tsk->[maj|min]_flt gets incremented
Diffstat (limited to 'arch/arm/kernel/smp_twd.c')
-rw-r--r--arch/arm/kernel/smp_twd.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/arm/kernel/smp_twd.c b/arch/arm/kernel/smp_twd.c
index fef42b21cec..5b150afb995 100644
--- a/arch/arm/kernel/smp_twd.c
+++ b/arch/arm/kernel/smp_twd.c
@@ -118,10 +118,14 @@ static int twd_cpufreq_transition(struct notifier_block *nb,
* The twd clock events must be reprogrammed to account for the new
* frequency. The timer is local to a cpu, so cross-call to the
* changing cpu.
+ *
+ * Only wait for it to finish, if the cpu is active to avoid
+ * deadlock when cpu1 is spinning on while(!cpu_active(cpu1)) during
+ * booting of that cpu.
*/
if (state == CPUFREQ_POSTCHANGE || state == CPUFREQ_RESUMECHANGE)
smp_call_function_single(freqs->cpu, twd_update_frequency,
- NULL, 1);
+ NULL, cpu_active(freqs->cpu));
return NOTIFY_OK;
}