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SubjectRe: [PATCH V2 08/14] Drivers: hv: balloon: Fix info request to show max page count
On Tue, Nov 01, 2016 at 01:07:28PM -0700, kys@exchange.microsoft.com wrote:
> From: Alex Ng <alexng@messages.microsoft.com>
>
> Balloon driver was only printing the size of the info blob and not the
> actual content. This fixes it so that the info blob (max page count as
> configured in Hyper-V) is printed out.
>
> Signed-off-by: Alex Ng <alexng@microsoft.com>
> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
> ---
> drivers/hv/hv_balloon.c | 9 +++++++--
> 1 files changed, 7 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/hv/hv_balloon.c b/drivers/hv/hv_balloon.c
> index 8cac29a..14c3dc4 100644
> --- a/drivers/hv/hv_balloon.c
> +++ b/drivers/hv/hv_balloon.c
> @@ -1034,8 +1034,13 @@ static void process_info(struct hv_dynmem_device *dm, struct dm_info_msg *msg)
>
> switch (info_hdr->type) {
> case INFO_TYPE_MAX_PAGE_CNT:
> - pr_info("Received INFO_TYPE_MAX_PAGE_CNT\n");
> - pr_info("Data Size is %d\n", info_hdr->data_size);
> + if (info_hdr->data_size == sizeof(__u64)) {
> + __u64 *max_page_count = (__u64 *)&info_hdr[1];

Why __u64 instead of u64? Is this code shared with user space?

regards,
dan carpenter


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