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Koen Kooi
9bc77dff5f
Regenerate all beaglebone patches and add one vfs tracer patch for powertop Signed-off-by: Koen Kooi <koen@dominion.thruhere.net> Signed-off-by: Denys Dmytriyenko <denys@ti.com>
57 lines
1.7 KiB
Diff
57 lines
1.7 KiB
Diff
From 6d7506b0391c86ac347dce94f2c4642ce126cf45 Mon Sep 17 00:00:00 2001
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From: Anton Blanchard <anton@samba.org>
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Date: Thu, 28 Jun 2012 19:28:57 +0000
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Subject: [PATCH 12/49] powerpc/xmon: Use cpumask iterator to avoid warning
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commit bc1d7702910c7c7e88eb60b58429dbfe293683ce upstream.
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We have a bug report where the kernel hits a warning in the cpumask
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code:
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WARNING: at include/linux/cpumask.h:107
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Which is:
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WARN_ON_ONCE(cpu >= nr_cpumask_bits);
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The backtrace is:
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cpu_cmd
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cmds
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xmon_core
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xmon
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die
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xmon is iterating through 0 to NR_CPUS. I'm not sure why we are still
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open coding this but iterating above nr_cpu_ids is definitely a bug.
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This patch iterates through all possible cpus, in case we issue a
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system reset and CPUs in an offline state call in.
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Perhaps the old code was trying to handle CPUs that were in the
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partition but were never started (eg kexec into a kernel with an
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nr_cpus= boot option). They are going to die way before we get into
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xmon since we haven't set any kernel state up for them.
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Signed-off-by: Anton Blanchard <anton@samba.org>
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Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
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---
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arch/powerpc/xmon/xmon.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/arch/powerpc/xmon/xmon.c b/arch/powerpc/xmon/xmon.c
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index 03a217a..b7e63d8 100644
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--- a/arch/powerpc/xmon/xmon.c
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+++ b/arch/powerpc/xmon/xmon.c
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@@ -975,7 +975,7 @@ static int cpu_cmd(void)
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/* print cpus waiting or in xmon */
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printf("cpus stopped:");
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count = 0;
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- for (cpu = 0; cpu < NR_CPUS; ++cpu) {
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+ for_each_possible_cpu(cpu) {
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if (cpumask_test_cpu(cpu, &cpus_in_xmon)) {
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if (count == 0)
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printf(" %x", cpu);
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--
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1.7.10
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