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Documentation/driver-api/early-userspace/buffer-format.rst includes the specification for checksum-enabled cpio archives. Implement support for this format in gen_init_cpio via a new '-c' parameter. Link: https://lkml.kernel.org/r/20220404093429.27570-6-ddiss@suse.de Signed-off-by: David Disseldorp <ddiss@suse.de> Suggested-by: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Christian Brauner <christian.brauner@ubuntu.com> Cc: Martin Wilck <mwilck@suse.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>