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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /arch/sh/kernel/crash_dump.c | |
parent | Initial commit. (diff) | |
download | linux-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/sh/kernel/crash_dump.c')
-rw-r--r-- | arch/sh/kernel/crash_dump.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/arch/sh/kernel/crash_dump.c b/arch/sh/kernel/crash_dump.c new file mode 100644 index 0000000000..19ce6a950a --- /dev/null +++ b/arch/sh/kernel/crash_dump.c @@ -0,0 +1,27 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * crash_dump.c - Memory preserving reboot related code. + * + * Created by: Hariprasad Nellitheertha (hari@in.ibm.com) + * Copyright (C) IBM Corporation, 2004. All rights reserved + */ +#include <linux/errno.h> +#include <linux/crash_dump.h> +#include <linux/io.h> +#include <linux/uio.h> +#include <linux/uaccess.h> + +ssize_t copy_oldmem_page(struct iov_iter *iter, unsigned long pfn, + size_t csize, unsigned long offset) +{ + void __iomem *vaddr; + + if (!csize) + return 0; + + vaddr = ioremap(pfn << PAGE_SHIFT, PAGE_SIZE); + csize = copy_to_iter(vaddr + offset, csize, iter); + iounmap(vaddr); + + return csize; +} |