From mboxrd@z Thu Jan 1 00:00:00 1970 From: Julia Cartwright Subject: [PATCH RT 1/2] locallock: provide {get,put}_locked_ptr() variants Date: Mon, 7 May 2018 08:58:56 -0500 Message-ID: <20180507135857.7565-1-julia@ni.com> References: <4064553.Shs7ScuBS6@ws-stein> Mime-Version: 1.0 Content-Type: text/plain Cc: , , "Phillip Lougher" , Alexander Stein To: , Return-path: In-Reply-To: <4064553.Shs7ScuBS6@ws-stein> Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-rt-users.vger.kernel.org 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 --- 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() -- 2.17.0