44 lines
1.4 KiB
Diff
44 lines
1.4 KiB
Diff
From: Julia Cartwright <julia@ni.com>
|
|
Date: Mon, 7 May 2018 08:58:56 -0500
|
|
Subject: [PATCH] locallock: provide {get,put}_locked_ptr() variants
|
|
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.1-rt3.tar.xz
|
|
|
|
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(+)
|
|
|
|
--- a/include/linux/locallock.h
|
|
+++ b/include/linux/locallock.h
|
|
@@ -222,6 +222,14 @@ static inline int __local_unlock_irqrest
|
|
|
|
#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(i
|
|
|
|
#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()
|