From: Julia Cartwright Date: Mon, 7 May 2018 08:58:56 -0500 Subject: [PATCH 062/353] locallock: provide {get,put}_locked_ptr() variants Origin: https://git.kernel.org/cgit/linux/kernel/git/rt/linux-stable-rt.git/commit?id=5dc9c8dde604d296946d3c972c85c62bc39ad790 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 Signed-off-by: Sebastian Andrzej Siewior --- 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()