On 31-05-16 16:03, Johannes Berg wrote:
> From: Johannes Berg <johannes.berg@xxxxxxxxx>
>
> Currently, only page_ref_inc() is needed, so backport only that.
>
> Change-Id: I7b4d7eb4ccccf61d0921ef28a40b6628e8f2c1f8
Guess the change-id is internal ;-) The patch works for me.
Regards,
Arend
> Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
> ---
> backport/backport-include/linux/mm.h | 1 +
> backport/backport-include/linux/page_ref.h | 13 +++++++++++++
> 2 files changed, 14 insertions(+)
> create mode 100644 backport/backport-include/linux/page_ref.h
>
> diff --git a/backport/backport-include/linux/mm.h b/backport/backport-include/linux/mm.h
> index bac230364139..5b3cca6afb63 100644
> --- a/backport/backport-include/linux/mm.h
> +++ b/backport/backport-include/linux/mm.h
> @@ -1,6 +1,7 @@
> #ifndef __BACKPORT_MM_H
> #define __BACKPORT_MM_H
> #include_next <linux/mm.h>
> +#include <linux/page_ref.h>
>
> #ifndef VM_NODUMP
> /*
> diff --git a/backport/backport-include/linux/page_ref.h b/backport/backport-include/linux/page_ref.h
> new file mode 100644
> index 000000000000..0b890e9be415
> --- /dev/null
> +++ b/backport/backport-include/linux/page_ref.h
> @@ -0,0 +1,13 @@
> +#ifndef __BP_PAGE_REF_H
> +#define __BP_PAGE_REF_H
> +#include <linux/version.h>
> +#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,6,0)
> +#include_next <linux/page_ref.h>
> +#else
> +static inline void page_ref_inc(struct page *page)
> +{
> + atomic_inc(&page->_count);
> +}
> +#endif
> +
> +#endif /* __BP_PAGE_REF_H */
>
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