1 files changed, 41 insertions, 0 deletions
diff --git a/arch/s390/include/asm/sections.h b/arch/s390/include/asm/sections.h
new file mode 100644
index 000000000..0c2151451
--- /dev/null
+++ b/arch/s390/include/asm/sections.h
@@ -0,0 +1,41 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _S390_SECTIONS_H
+#define _S390_SECTIONS_H
+
+#define arch_is_kernel_initmem_freed arch_is_kernel_initmem_freed
+
+#include <asm-generic/sections.h>
+
+extern bool initmem_freed;
+
+static inline int arch_is_kernel_initmem_freed(unsigned long addr)
+{
+	if (!initmem_freed)
+		return 0;
+	return addr >= (unsigned long)__init_begin &&
+	       addr < (unsigned long)__init_end;
+}
+
+/*
+ * .boot.data section contains variables "shared" between the decompressor and
+ * the decompressed kernel. The decompressor will store values in them, and
+ * copy over to the decompressed image before starting it.
+ *
+ * Each variable end up in its own intermediate section .boot.data.<var name>,
+ * those sections are later sorted by alignment + name and merged together into
+ * final .boot.data section, which should be identical in the decompressor and
+ * the decompressed kernel (that is checked during the build).
+ */
+#define __bootdata(var) __section(".boot.data." #var) var
+
+/*
+ * .boot.preserved.data is similar to .boot.data, but it is not part of the
+ * .init section and thus will be preserved for later use in the decompressed
+ * kernel.
+ */
+#define __bootdata_preserved(var) __section(".boot.preserved.data." #var) var
+
+extern unsigned long __sdma, __edma;
+extern unsigned long __stext_dma, __etext_dma;
+
+#endif