Quoting Dan Smith (danms@xxxxxxxxxx):
> As suggested by Dave, this provides us a way to make the copy-in and
> copy-out processes symmetric. I also added CR_COPY_BIT() to use with
> the s390 bitfields, since we can't memcpy() those.
>
> Signed-off-by: Dan Smith <danms@xxxxxxxxxx>
> ---
> include/linux/checkpoint.h | 20 ++++++++++++++++++++
> 1 files changed, 20 insertions(+), 0 deletions(-)
>
> diff --git a/include/linux/checkpoint.h b/include/linux/checkpoint.h
> index 217cf6e..b94422a 100644
> --- a/include/linux/checkpoint.h
> +++ b/include/linux/checkpoint.h
> @@ -149,4 +149,24 @@ static inline void process_deny_checkpointing(struct task_struct *task) {}
>
> #endif
>
> +#define CR_CPT 1
> +#define CR_RST 2
> +
> +#define CR_COPY(op, a, b) \
> + do { \
> + WARN_ON(sizeof(a) != sizeof(b)); \
Can this be a BUILD_BUG_ON()?
> + if (op == CR_CPT) \
> + memcpy(&a, &b, sizeof(a)); \
> + else \
> + memcpy(&b, &a, sizeof(a)); \
> + } while (0);
> +
> +#define CR_COPY_BIT(op, a, b) \
> + do { \
maybe add a
BUILD_BUG_ON(typeof(a)!=typeof(b));
?
> + if (op == CR_CPT) \
> + a = b; \
> + else \
> + b = a; \
> + } while (0);
> +
> #endif /* _CHECKPOINT_CKPT_H_ */
> --
> 1.6.1
>
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