Imported linux-2.6.27.39 suse/xen patches.

[people/pmueller/ipfire-2.x.git] / src / patches / suse-2.6.27.31 / patches.arch / s390-08-03-iucv-cpu-hotremove.diff

diff --git a/src/patches/suse-2.6.27.31/patches.arch/s390-08-03-iucv-cpu-hotremove.diff b/src/patches/suse-2.6.27.31/patches.arch/s390-08-03-iucv-cpu-hotremove.diff
deleted file mode 100644 (file)
index 98cbf4b..0000000
--- a/src/patches/suse-2.6.27.31/patches.arch/s390-08-03-iucv-cpu-hotremove.diff
+++ /dev/null
@@ -1,83 +0,0 @@
-From: Gerald Schaefer <geraldsc@de.ibm.com>
-Subject: iucv: failing cpu hot remove for inactive iucv
-References: bnc#466462,LTC#51104
-
-Symptom:     cpu hot remove rejected with NOTIFY_BAD
-Problem:     If the iucv module is compiled in / loaded but no user
-             is registered, cpu hot remove doesn't work. The iucv
-             cpu hotplug notifier on CPU_DOWN_PREPARE checks, if
-             the iucv_buffer_cpumask would be empty after the
-             corresponding bit would be cleared. However the bit
-             was never set since iucv wasn't enabled. That causes
-             all cpu hot unplug operations to fail in this scenario.
-Solution:    Use iucv_path_table as an indicator whether iucv is
-             enabled or not.
-
-Acked-by: John Jolly <jjolly@suse.de>
----
-
- net/iucv/iucv.c |   18 +++++++++++-------
- 1 file changed, 11 insertions(+), 7 deletions(-)
-
-Index: linux-sles11/net/iucv/iucv.c
-===================================================================
---- linux-sles11.orig/net/iucv/iucv.c
-+++ linux-sles11/net/iucv/iucv.c
-@@ -516,6 +516,7 @@ static int iucv_enable(void)
-       size_t alloc_size;
-       int cpu, rc;
- 
-+      get_online_cpus();
-       rc = -ENOMEM;
-       alloc_size = iucv_max_pathid * sizeof(struct iucv_path);
-       iucv_path_table = kzalloc(alloc_size, GFP_KERNEL);
-@@ -523,19 +524,17 @@ static int iucv_enable(void)
-               goto out;
-       /* Declare per cpu buffers. */
-       rc = -EIO;
--      get_online_cpus();
-       for_each_online_cpu(cpu)
-               smp_call_function_single(cpu, iucv_declare_cpu, NULL, 1);
-       if (cpus_empty(iucv_buffer_cpumask))
-               /* No cpu could declare an iucv buffer. */
--              goto out_path;
-+              goto out;
-       put_online_cpus();
-       return 0;
--
--out_path:
--      put_online_cpus();
--      kfree(iucv_path_table);
- out:
-+      kfree(iucv_path_table);
-+      iucv_path_table = NULL;
-+      put_online_cpus();
-       return rc;
- }
- 
-@@ -550,8 +549,9 @@ static void iucv_disable(void)
- {
-       get_online_cpus();
-       on_each_cpu(iucv_retrieve_cpu, NULL, 1);
--      put_online_cpus();
-       kfree(iucv_path_table);
-+      iucv_path_table = NULL;
-+      put_online_cpus();
- }
- 
- static int __cpuinit iucv_cpu_notify(struct notifier_block *self,
-@@ -588,10 +588,14 @@ static int __cpuinit iucv_cpu_notify(str
-       case CPU_ONLINE_FROZEN:
-       case CPU_DOWN_FAILED:
-       case CPU_DOWN_FAILED_FROZEN:
-+              if (!iucv_path_table)
-+                      break;
-               smp_call_function_single(cpu, iucv_declare_cpu, NULL, 1);
-               break;
-       case CPU_DOWN_PREPARE:
-       case CPU_DOWN_PREPARE_FROZEN:
-+              if (!iucv_path_table)
-+                      break;
-               cpumask = iucv_buffer_cpumask;
-               cpu_clear(cpu, cpumask);
-               if (cpus_empty(cpumask))