Messages in this thread Patch in this message | | | Date | Fri, 07 Sep 2018 16:58:59 -0400 | From | Steven Rostedt <> | Subject | [PATCH RT 02/24] locallock: provide {get,put}_locked_ptr() variants |
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4.14.63-rt41-rc2 stable review patch. If anyone has any objections, please let me know.
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From: Julia Cartwright <julia@ni.com>
[ Upstream commit 3d45cf23db4f76cd356ebb0aa4cdaa7d92d1a64e ]
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> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> --- 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() -- 2.18.0
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