The patch titled
sparc64: avoid invoking irq handlers on offline CPUs
has been removed from the -mm tree. Its filename was
sparc64-avoid-invoking-irq-handlers-on-offline-cpus.patch
This patch was dropped because an alternative patch was merged
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: sparc64: avoid invoking irq handlers on offline CPUs
From: "Paul E. McKenney" <paulmck@xxxxxxxxxxxxxxxxxx>
Make sparc64 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.
Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/sparc64/kernel/smp.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff -puN arch/sparc64/kernel/smp.c~sparc64-avoid-invoking-irq-handlers-on-offline-cpus arch/sparc64/kernel/smp.c
--- a/arch/sparc64/kernel/smp.c~sparc64-avoid-invoking-irq-handlers-on-offline-cpus
+++ a/arch/sparc64/kernel/smp.c
@@ -1305,10 +1305,6 @@ int __cpu_disable(void)
c->core_id = 0;
c->proc_id = -1;
- spin_lock(&call_lock);
- cpu_clear(cpu, cpu_online_map);
- spin_unlock(&call_lock);
-
smp_wmb();
/* Make sure no interrupts point to this cpu. */
@@ -1318,6 +1314,10 @@ int __cpu_disable(void)
mdelay(1);
local_irq_disable();
+ spin_lock(&call_lock);
+ cpu_clear(cpu, cpu_online_map);
+ spin_unlock(&call_lock);
+
return 0;
}
_
Patches currently in -mm which might be from paulmck@xxxxxxxxxxxxxxxxxx are
linux-next.patch
ia64-avoid-invoking-irq-handlers-on-offline-cpus.patch
rcu-spinlocks-take-an-unsigned-long-flags.patch
rcu-fix-sparse-shadowed-variable-warning.patch
sparc64-avoid-invoking-irq-handlers-on-offline-cpus.patch
modules-remove-stop_machine-during-module-load.patch
modules-remove-stop_machine-during-module-load-checkpatch-fixes.patch
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