>
> ssize_t elfcorehdr_read(char *buf, size_t count, u64 *ppos)
> {
> - return read_from_oldmem(buf, count, ppos, 0,
> + struct kvec kvec = { .iov_base = buf, .iov_len = count };
> + struct iov_iter iter;
> +
> + iov_iter_kvec(&iter, READ, &kvec, 1, count);
> +
> + return read_from_oldmem(&iter, count, ppos,
> cc_platform_has(CC_ATTR_GUEST_MEM_ENCRYPT));
> }
elfcorehdr_read should probably also take an iov_iter while we're at it.
I also don't quite understand why we even need the arch overrides for it,
but that would require some digging into the history of this interface.
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