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-rw-r--r--arch/ia64/kernel/crash_dump.c27
1 files changed, 27 insertions, 0 deletions
diff --git a/arch/ia64/kernel/crash_dump.c b/arch/ia64/kernel/crash_dump.c
new file mode 100644
index 0000000000..4ef68e2aa7
--- /dev/null
+++ b/arch/ia64/kernel/crash_dump.c
@@ -0,0 +1,27 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * kernel/crash_dump.c - Memory preserving reboot related code.
+ *
+ * Created by: Simon Horman <horms@verge.net.au>
+ * Original code moved from kernel/crash.c
+ * Original code comment copied from the i386 version of this file
+ */
+
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/crash_dump.h>
+#include <linux/uio.h>
+#include <asm/page.h>
+
+ssize_t copy_oldmem_page(struct iov_iter *iter, unsigned long pfn,
+ size_t csize, unsigned long offset)
+{
+ void *vaddr;
+
+ if (!csize)
+ return 0;
+ vaddr = __va(pfn<<PAGE_SHIFT);
+ csize = copy_to_iter(vaddr + offset, csize, iter);
+ return csize;
+}
+