diff options
Diffstat (limited to 'arch/ia64/kernel/crash_dump.c')
| -rw-r--r-- | arch/ia64/kernel/crash_dump.c | 27 |
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; +} + |