On 08/14/2017 04:51 PM, Mike Rapoport wrote:
> There is no requirement that uffdio_api.features must be zero for newer
> kernels. This field actually defines what features user space would like to
> enable.
Thanks, Mike. Applied.
Cheers,
Michael
> Signed-off-by: Mike Rapoport <rppt@xxxxxxxxxxxxxxxxxx>
> ---
> man2/ioctl_userfaultfd.2 | 3 +--
> 1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/man2/ioctl_userfaultfd.2 b/man2/ioctl_userfaultfd.2
> index f97b3ef..14260fc 100644
> --- a/man2/ioctl_userfaultfd.2
> +++ b/man2/ioctl_userfaultfd.2
> @@ -86,7 +86,7 @@ structure, defined as:
>
> struct uffdio_api {
> __u64 api; /* Requested API version (input) */
> - __u64 features; /* Currently must be zero (input) */
> + __u64 features; /* Requested features (input/output) */
> __u64 ioctls; /* Available ioctl() operations (output) */
> };
>
> @@ -665,4 +665,3 @@ operation that actually enables the desired features.
>
> .IR Documentation/vm/userfaultfd.txt
> in the Linux kernel source tree
> -
>
--
Michael Kerrisk
Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/
Linux/UNIX System Programming Training: http://man7.org/training/
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