The patch titled
i386: avoid checking for cpu gone when CONFIG_HOTPLUG_CPU not defined
has been added to the -mm tree. Its filename is
i386-avoid-checking-for-cpu-gone-when-config_hotplug_cpu-not-defined.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: i386: avoid checking for cpu gone when CONFIG_HOTPLUG_CPU not defined
From: "Keshavamurthy, Anil S" <anil.s.keshavamurthy@xxxxxxxxx>
Avoid checking for cpu gone in mm hot path when CONFIG_HOTPLUG_CPU is not
defined.
Signed-off-by: Anil S Keshavamurthy <anil.s.keshavamurthy@xxxxxxxxx>
Cc: Andi Kleen <ak@xxxxxxx>
Cc: Gautham R Shenoy <ego@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/i386/kernel/smp.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff -puN arch/i386/kernel/smp.c~i386-avoid-checking-for-cpu-gone-when-config_hotplug_cpu-not-defined arch/i386/kernel/smp.c
--- a/arch/i386/kernel/smp.c~i386-avoid-checking-for-cpu-gone-when-config_hotplug_cpu-not-defined
+++ a/arch/i386/kernel/smp.c
@@ -366,10 +366,12 @@ static void flush_tlb_others(cpumask_t c
BUG_ON(cpu_isset(smp_processor_id(), cpumask));
BUG_ON(!mm);
+#ifdef CONFIG_HOTPLUG_CPU
/* If a CPU which we ran on has gone down, OK. */
cpus_and(cpumask, cpumask, cpu_online_map);
- if (cpus_empty(cpumask))
+ if (unlikely(cpus_empty(cpumask)))
return;
+#endif
/*
* i'm not happy about this global shared spinlock in the
_
Patches currently in -mm which might be from anil.s.keshavamurthy@xxxxxxxxx are
i386-avoid-checking-for-cpu-gone-when-config_hotplug_cpu-not-defined.patch
kprobes-print-details-of-kretprobe-on-assertion-failure.patch
kprobes-use-hlist_for_each_entry.patch
kprobes-codingstyle-cleanups.patch
kprobes-kretprobes-simplifcations.patch
-
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