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authorMaxime Ripard <maxime@cerno.tech>2023-05-12 09:47:12 +0200
committerMaxime Ripard <maxime@cerno.tech>2023-05-12 09:47:12 +0200
commit50282fd57bcd3525c9d81eef58df8718e4337c6d (patch)
tree9795dfdb1a9b66904d9320f33c9216683d10576a /include/linux/livepatch_sched.h
parentad81e23426a651eb89a4b306e1c4169e6308c124 (diff)
parentac9a78681b921877518763ba0e89202254349d1b (diff)
Merge drm/drm-fixes into drm-misc-fixes
Let's bring 6.4-rc1 in drm-misc-fixes to start the new fix cycle. Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Diffstat (limited to 'include/linux/livepatch_sched.h')
-rw-r--r--include/linux/livepatch_sched.h29
1 files changed, 29 insertions, 0 deletions
diff --git a/include/linux/livepatch_sched.h b/include/linux/livepatch_sched.h
new file mode 100644
index 000000000000..013794fb5da0
--- /dev/null
+++ b/include/linux/livepatch_sched.h
@@ -0,0 +1,29 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+#ifndef _LINUX_LIVEPATCH_SCHED_H_
+#define _LINUX_LIVEPATCH_SCHED_H_
+
+#include <linux/jump_label.h>
+#include <linux/static_call_types.h>
+
+#ifdef CONFIG_LIVEPATCH
+
+void __klp_sched_try_switch(void);
+
+#if !defined(CONFIG_PREEMPT_DYNAMIC) || !defined(CONFIG_HAVE_PREEMPT_DYNAMIC_CALL)
+
+DECLARE_STATIC_KEY_FALSE(klp_sched_try_switch_key);
+
+static __always_inline void klp_sched_try_switch(void)
+{
+ if (static_branch_unlikely(&klp_sched_try_switch_key))
+ __klp_sched_try_switch();
+}
+
+#endif /* !CONFIG_PREEMPT_DYNAMIC || !CONFIG_HAVE_PREEMPT_DYNAMIC_CALL */
+
+#else /* !CONFIG_LIVEPATCH */
+static inline void klp_sched_try_switch(void) {}
+static inline void __klp_sched_try_switch(void) {}
+#endif /* CONFIG_LIVEPATCH */
+
+#endif /* _LINUX_LIVEPATCH_SCHED_H_ */