4.19-stable patches

added patches:
	powerpc-pseries-fix-regression-while-building-external-modules.patch
	revert-perf-map-fix-dso-nsinfo-refcounting.patch

diff --git a/queue-4.19/powerpc-pseries-fix-regression-while-building-external-modules.patch b/queue-4.19/powerpc-pseries-fix-regression-while-building-external-modules.patch
new file mode 100644 (file)
index 0000000..88ce1d8
--- /dev/null
+++ b/queue-4.19/powerpc-pseries-fix-regression-while-building-external-modules.patch
@@ -0,0 +1,77 @@
+From 333cf507465fbebb3727f5b53e77538467df312a Mon Sep 17 00:00:00 2001
+From: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
+Date: Thu, 29 Jul 2021 11:34:49 +0530
+Subject: powerpc/pseries: Fix regression while building external modules
+
+From: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
+
+commit 333cf507465fbebb3727f5b53e77538467df312a upstream.
+
+With commit c9f3401313a5 ("powerpc: Always enable queued spinlocks for
+64s, disable for others") CONFIG_PPC_QUEUED_SPINLOCKS is always
+enabled on ppc64le, external modules that use spinlock APIs are
+failing.
+
+  ERROR: modpost: GPL-incompatible module XXX.ko uses GPL-only symbol 'shared_processor'
+
+Before the above commit, modules were able to build without any
+issues. Also this problem is not seen on other architectures. This
+problem can be workaround if CONFIG_UNINLINE_SPIN_UNLOCK is enabled in
+the config. However CONFIG_UNINLINE_SPIN_UNLOCK is not enabled by
+default and only enabled in certain conditions like
+CONFIG_DEBUG_SPINLOCKS is set in the kernel config.
+
+  #include <linux/module.h>
+  spinlock_t spLock;
+
+  static int __init spinlock_test_init(void)
+  {
+          spin_lock_init(&spLock);
+          spin_lock(&spLock);
+          spin_unlock(&spLock);
+          return 0;
+  }
+
+  static void __exit spinlock_test_exit(void)
+  {
+       printk("spinlock_test unloaded\n");
+  }
+  module_init(spinlock_test_init);
+  module_exit(spinlock_test_exit);
+
+  MODULE_DESCRIPTION ("spinlock_test");
+  MODULE_LICENSE ("non-GPL");
+  MODULE_AUTHOR ("Srikar Dronamraju");
+
+Given that spin locks are one of the basic facilities for module code,
+this effectively makes it impossible to build/load almost any non GPL
+modules on ppc64le.
+
+This was first reported at https://github.com/openzfs/zfs/issues/11172
+
+Currently shared_processor is exported as GPL only symbol.
+Fix this for parity with other architectures by exposing
+shared_processor to non-GPL modules too.
+
+Fixes: 14c73bd344da ("powerpc/vcpu: Assume dedicated processors as non-preempt")
+Cc: stable@vger.kernel.org # v5.5+
+Reported-by: marc.c.dionne@gmail.com
+Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
+Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
+Link: https://lore.kernel.org/r/20210729060449.292780-1-srikar@linux.vnet.ibm.com
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ arch/powerpc/platforms/pseries/setup.c |    2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/arch/powerpc/platforms/pseries/setup.c
++++ b/arch/powerpc/platforms/pseries/setup.c
+@@ -76,7 +76,7 @@
+ #include "../../../../drivers/pci/pci.h"
+ 
+ DEFINE_STATIC_KEY_FALSE(shared_processor);
+-EXPORT_SYMBOL_GPL(shared_processor);
++EXPORT_SYMBOL(shared_processor);
+ 
+ int CMO_PrPSP = -1;
+ int CMO_SecPSP = -1;

diff --git a/queue-4.19/revert-perf-map-fix-dso-nsinfo-refcounting.patch b/queue-4.19/revert-perf-map-fix-dso-nsinfo-refcounting.patch
new file mode 100644 (file)
index 0000000..3d6d150
--- /dev/null
+++ b/queue-4.19/revert-perf-map-fix-dso-nsinfo-refcounting.patch
@@ -0,0 +1,39 @@
+From 9bac1bd6e6d36459087a728a968e79e37ebcea1a Mon Sep 17 00:00:00 2001
+From: Arnaldo Carvalho de Melo <acme@redhat.com>
+Date: Fri, 30 Jul 2021 18:26:22 -0300
+Subject: Revert "perf map: Fix dso->nsinfo refcounting"
+
+From: Arnaldo Carvalho de Melo <acme@redhat.com>
+
+commit 9bac1bd6e6d36459087a728a968e79e37ebcea1a upstream.
+
+This makes 'perf top' abort in some cases, and the right fix will
+involve surgery that is too much to do at this stage, so revert for now
+and fix it in the next merge window.
+
+This reverts commit 2d6b74baa7147251c30a46c4996e8cc224aa2dc5.
+
+Cc: Riccardo Mancini <rickyman7@gmail.com>
+Cc: Ian Rogers <irogers@google.com>
+Cc: Jiri Olsa <jolsa@redhat.com>
+Cc: Krister Johansen <kjlx@templeofstupid.com>
+Cc: Mark Rutland <mark.rutland@arm.com>
+Cc: Namhyung Kim <namhyung@kernel.org>
+Cc: Peter Zijlstra <peterz@infradead.org>
+Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ tools/perf/util/map.c |    2 --
+ 1 file changed, 2 deletions(-)
+
+--- a/tools/perf/util/map.c
++++ b/tools/perf/util/map.c
+@@ -209,8 +209,6 @@ struct map *map__new(struct machine *mac
+                       if (!(prot & PROT_EXEC))
+                               dso__set_loaded(dso);
+               }
+-
+-              nsinfo__put(dso->nsinfo);
+               dso->nsinfo = nsi;
+               dso__put(dso);
+       }

diff --git a/queue-4.19/series b/queue-4.19/series
index 36e8936d73545ee98fc4f13d6ad6ed7495e8ae77..8cc202ec9e2ae2b4fd23eae0659d41dd52a5a6ca 100644 (file)
--- a/queue-4.19/series
+++ b/queue-4.19/series
@@ -25,3 +25,5 @@ sctp-fix-return-value-check-in-__sctp_rcv_asconf_loo.patch
 tulip-windbond-840-fix-missing-pci_disable_device-in.patch
 sis900-fix-missing-pci_disable_device-in-probe-and-r.patch
 can-hi311x-fix-a-signedness-bug-in-hi3110_cmd.patch
+powerpc-pseries-fix-regression-while-building-external-modules.patch
+revert-perf-map-fix-dso-nsinfo-refcounting.patch