1 files changed, 48 insertions, 0 deletions
diff --git a/arch/x86/include/asm/current.h b/arch/x86/include/asm/current.h
new file mode 100644
index 0000000000..a1168e7b69
--- /dev/null
+++ b/arch/x86/include/asm/current.h
@@ -0,0 +1,48 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_X86_CURRENT_H
+#define _ASM_X86_CURRENT_H
+
+#include <linux/compiler.h>
+
+#ifndef __ASSEMBLY__
+
+#include <linux/cache.h>
+#include <asm/percpu.h>
+
+struct task_struct;
+
+struct pcpu_hot {
+	union {
+		struct {
+			struct task_struct	*current_task;
+			int			preempt_count;
+			int			cpu_number;
+#ifdef CONFIG_CALL_DEPTH_TRACKING
+			u64			call_depth;
+#endif
+			unsigned long		top_of_stack;
+			void			*hardirq_stack_ptr;
+			u16			softirq_pending;
+#ifdef CONFIG_X86_64
+			bool			hardirq_stack_inuse;
+#else
+			void			*softirq_stack_ptr;
+#endif
+		};
+		u8	pad[64];
+	};
+};
+static_assert(sizeof(struct pcpu_hot) == 64);
+
+DECLARE_PER_CPU_ALIGNED(struct pcpu_hot, pcpu_hot);
+
+static __always_inline struct task_struct *get_current(void)
+{
+	return this_cpu_read_stable(pcpu_hot.current_task);
+}
+
+#define current get_current()
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* _ASM_X86_CURRENT_H */