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From: Julia Cartwright <julia@ni.com>
Date: Mon, 7 May 2018 08:58:56 -0500
Subject: [PATCH 062/351] locallock: provide {get,put}_locked_ptr() variants
Origin: https://git.kernel.org/cgit/linux/kernel/git/rt/linux-stable-rt.git/commit?id=138eba591ac83924b533005888b35e070687a49d
Provide a set of locallocked accessors for pointers to per-CPU data;
this is useful for dynamically-allocated per-CPU regions, for example.
These are symmetric with the {get,put}_cpu_ptr() per-CPU accessor
variants.
Signed-off-by: Julia Cartwright <julia@ni.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
include/linux/locallock.h | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/include/linux/locallock.h b/include/linux/locallock.h
index d658c2552601..921eab83cd34 100644
--- a/include/linux/locallock.h
+++ b/include/linux/locallock.h
@@ -222,6 +222,14 @@ static inline int __local_unlock_irqrestore(struct local_irq_lock *lv,
#define put_locked_var(lvar, var) local_unlock(lvar);
+#define get_locked_ptr(lvar, var) \
+ ({ \
+ local_lock(lvar); \
+ this_cpu_ptr(var); \
+ })
+
+#define put_locked_ptr(lvar, var) local_unlock(lvar);
+
#define local_lock_cpu(lvar) \
({ \
local_lock(lvar); \
@@ -262,6 +270,8 @@ static inline void local_irq_lock_init(int lvar) { }
#define get_locked_var(lvar, var) get_cpu_var(var)
#define put_locked_var(lvar, var) put_cpu_var(var)
+#define get_locked_ptr(lvar, var) get_cpu_ptr(var)
+#define put_locked_ptr(lvar, var) put_cpu_ptr(var)
#define local_lock_cpu(lvar) get_cpu()
#define local_unlock_cpu(lvar) put_cpu()
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