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From 8a8dec23a3dc3e15c14966d76a1d148c54d79631 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Tue, 28 Jun 2011 20:42:16 +0200
Subject: [PATCH 169/270] local-vars-migrate-disable.patch
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
include/linux/percpu.h | 28 ++++++++++++++++++++++++----
1 file changed, 24 insertions(+), 4 deletions(-)
diff --git a/include/linux/percpu.h b/include/linux/percpu.h
index 3d13ce0..5a56f183 100644
--- a/include/linux/percpu.h
+++ b/include/linux/percpu.h
@@ -48,10 +48,30 @@
preempt_enable(); \
} while (0)
-#define get_local_var(var) get_cpu_var(var)
-#define put_local_var(var) put_cpu_var(var)
-#define get_local_ptr(var) get_cpu_ptr(var)
-#define put_local_ptr(var) put_cpu_ptr(var)
+#ifndef CONFIG_PREEMPT_RT_FULL
+# define get_local_var(var) get_cpu_var(var)
+# define put_local_var(var) put_cpu_var(var)
+# define get_local_ptr(var) get_cpu_ptr(var)
+# define put_local_ptr(var) put_cpu_ptr(var)
+#else
+# define get_local_var(var) (*({ \
+ migrate_disable(); \
+ &__get_cpu_var(var); }))
+
+# define put_local_var(var) do { \
+ (void)&(var); \
+ migrate_enable(); \
+} while (0)
+
+# define get_local_ptr(var) ({ \
+ migrate_disable(); \
+ this_cpu_ptr(var); })
+
+# define put_local_ptr(var) do { \
+ (void)(var); \
+ migrate_enable(); \
+} while (0)
+#endif
/* minimum unit size, also is the maximum supported allocation size */
#define PCPU_MIN_UNIT_SIZE PFN_ALIGN(32 << 10)
--
1.7.10.4
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