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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /arch/riscv/include/asm/current.h
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/riscv/include/asm/current.h')
-rw-r--r--arch/riscv/include/asm/current.h40
1 files changed, 40 insertions, 0 deletions
diff --git a/arch/riscv/include/asm/current.h b/arch/riscv/include/asm/current.h
new file mode 100644
index 0000000000..21774d868c
--- /dev/null
+++ b/arch/riscv/include/asm/current.h
@@ -0,0 +1,40 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Based on arm/arm64/include/asm/current.h
+ *
+ * Copyright (C) 2016 ARM
+ * Copyright (C) 2017 SiFive
+ */
+
+
+#ifndef _ASM_RISCV_CURRENT_H
+#define _ASM_RISCV_CURRENT_H
+
+#include <linux/bug.h>
+#include <linux/compiler.h>
+
+#ifndef __ASSEMBLY__
+
+struct task_struct;
+
+register struct task_struct *riscv_current_is_tp __asm__("tp");
+
+/*
+ * This only works because "struct thread_info" is at offset 0 from "struct
+ * task_struct". This constraint seems to be necessary on other architectures
+ * as well, but __switch_to enforces it. We can't check TASK_TI here because
+ * <asm/asm-offsets.h> includes this, and I can't get the definition of "struct
+ * task_struct" here due to some header ordering problems.
+ */
+static __always_inline struct task_struct *get_current(void)
+{
+ return riscv_current_is_tp;
+}
+
+#define current get_current()
+
+register unsigned long current_stack_pointer __asm__("sp");
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* _ASM_RISCV_CURRENT_H */