[patch-rt] drivers/zram: fix zcomp_stream_get() smp_processor_id() use in preemptible code

From	Mike Galbraith <efault@gmx.de>
Newsgroups	linux.kernel
Subject	[patch-rt] drivers/zram: fix zcomp_stream_get() smp_processor_id() use in preemptible code
Date	2017-08-23 12:00 +0200
Message-ID	<uhAC7-7kw-17@gated-at.bofh.it> (permalink)
References	<ufOg9-3uF-15@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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Use get_local_ptr() vs this_cpu_ptr().

Signed-off-by: Mike Galbraith <efault@gmx.de>
---
 drivers/block/zram/zcomp.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/block/zram/zcomp.c
+++ b/drivers/block/zram/zcomp.c
@@ -120,7 +120,7 @@ struct zcomp_strm *zcomp_stream_get(stru
 {
 	struct zcomp_strm *zstrm;
 
-	zstrm = *this_cpu_ptr(comp->stream);
+	zstrm = *get_local_ptr(comp->stream);
 	spin_lock(&zstrm->zcomp_lock);
 	return zstrm;
 }
@@ -131,6 +131,7 @@ void zcomp_stream_put(struct zcomp *comp
 
 	zstrm = *this_cpu_ptr(comp->stream);
 	spin_unlock(&zstrm->zcomp_lock);
+	put_local_ptr(zstrm);
 }
 
 int zcomp_compress(struct zcomp_strm *zstrm,

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[ANNOUNCE] v4.11.12-rt10 Sebastian Andrzej Siewior <bigeasy@linutronix.de> - 2017-08-18 14:10 +0200
  v4.11.12-rt10 - hotplug lockdep splat Mike Galbraith <efault@gmx.de> - 2017-08-23 12:00 +0200
  [patch-rt] drivers/zram: fix zcomp_stream_get() smp_processor_id()  use in preemptible code Mike Galbraith <efault@gmx.de> - 2017-08-23 12:00 +0200

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