53 lines
1.9 KiB
Diff
53 lines
1.9 KiB
Diff
From 911aaa10543fb610a948db94025c5c2a337b3c0a Mon Sep 17 00:00:00 2001
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Message-Id: <911aaa10543fb610a948db94025c5c2a337b3c0a.1601675151.git.zanussi@kernel.org>
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In-Reply-To: <5b5a156f9808b1acf1205606e03da117214549ea.1601675151.git.zanussi@kernel.org>
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References: <5b5a156f9808b1acf1205606e03da117214549ea.1601675151.git.zanussi@kernel.org>
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From: Julia Cartwright <julia@ni.com>
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Date: Mon, 7 May 2018 08:58:56 -0500
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Subject: [PATCH 062/333] locallock: provide {get,put}_locked_ptr() variants
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Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.148-rt64.tar.xz
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Provide a set of locallocked accessors for pointers to per-CPU data;
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this is useful for dynamically-allocated per-CPU regions, for example.
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These are symmetric with the {get,put}_cpu_ptr() per-CPU accessor
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variants.
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Signed-off-by: Julia Cartwright <julia@ni.com>
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Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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---
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include/linux/locallock.h | 10 ++++++++++
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1 file changed, 10 insertions(+)
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diff --git a/include/linux/locallock.h b/include/linux/locallock.h
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index d658c2552601..921eab83cd34 100644
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--- a/include/linux/locallock.h
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+++ b/include/linux/locallock.h
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@@ -222,6 +222,14 @@ static inline int __local_unlock_irqrestore(struct local_irq_lock *lv,
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#define put_locked_var(lvar, var) local_unlock(lvar);
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+#define get_locked_ptr(lvar, var) \
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+ ({ \
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+ local_lock(lvar); \
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+ this_cpu_ptr(var); \
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+ })
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+
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+#define put_locked_ptr(lvar, var) local_unlock(lvar);
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+
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#define local_lock_cpu(lvar) \
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({ \
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local_lock(lvar); \
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@@ -262,6 +270,8 @@ static inline void local_irq_lock_init(int lvar) { }
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#define get_locked_var(lvar, var) get_cpu_var(var)
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#define put_locked_var(lvar, var) put_cpu_var(var)
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+#define get_locked_ptr(lvar, var) get_cpu_ptr(var)
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+#define put_locked_ptr(lvar, var) put_cpu_ptr(var)
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#define local_lock_cpu(lvar) get_cpu()
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#define local_unlock_cpu(lvar) put_cpu()
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--
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2.17.1
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