The patch titled
ia64: avoid invoking irq handlers on offline CPUs
has been removed from the -mm tree. Its filename was
ia64-avoid-invoking-irq-handlers-on-offline-cpus.patch
This patch was dropped because it was merged into mainline or a subsystem tree
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: ia64: avoid invoking irq handlers on offline CPUs
From: "Paul E. McKenney" <paulmck@xxxxxxxxxxxxxxxxxx>
Make ia64 refrain from clearing a given to-be-offlined CPU's bit in the
cpu_online_mask until it has processed pending irqs. This change prevents
other CPUs from being blindsided by an apparently offline CPU nevertheless
changing globally visible state. Also remove the existing redundant
cpu_clear(cpu, cpu_online_map).
Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
Cc: Vegard Nossum <vegard.nossum@xxxxxxxxx>
Cc: Jes Sorensen <jes@xxxxxxxxxxxxxxxxxx>
Cc: Manfred Spraul <manfred@xxxxxxxxxxxxxxxx>
Cc: "Luck, Tony" <tony.luck@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/ia64/kernel/smpboot.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff -puN arch/ia64/kernel/smpboot.c~ia64-avoid-invoking-irq-handlers-on-offline-cpus arch/ia64/kernel/smpboot.c
--- a/arch/ia64/kernel/smpboot.c~ia64-avoid-invoking-irq-handlers-on-offline-cpus
+++ a/arch/ia64/kernel/smpboot.c
@@ -741,16 +741,14 @@ int __cpu_disable(void)
return -EBUSY;
}
- cpu_clear(cpu, cpu_online_map);
-
if (migrate_platform_irqs(cpu)) {
cpu_set(cpu, cpu_online_map);
return (-EBUSY);
}
remove_siblinginfo(cpu);
- cpu_clear(cpu, cpu_online_map);
fixup_irqs();
+ cpu_clear(cpu, cpu_online_map);
local_flush_tlb_all();
cpu_clear(cpu, cpu_callin_map);
return 0;
_
Patches currently in -mm which might be from paulmck@xxxxxxxxxxxxxxxxxx are
origin.patch
linux-next.patch
rcu-fix-sparse-shadowed-variable-warning.patch
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