lkml.org 
[lkml]   [2020]   [Mar]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v2 1/3] iommu/uapi: Define uapi version and capabilities
On Wed, Mar 25, 2020 at 04:17:05PM -0700, Jacob Pan wrote:
> Having a single UAPI version to govern the user-kernel data structures
> makes compatibility check straightforward. On the contrary, supporting
> combinations of multiple versions of the data can be a nightmare to
> maintain.
>
> This patch defines a unified UAPI version to be used for compatibility
> checks between user and kernel.

This is bullshit. Version numbers don't scale and we've avoided them
everywhere. You need need flags specifying specific behavior.

> +#define IOMMU_UAPI_VERSION 1
> +static inline int iommu_get_uapi_version(void)
> +{
> + return IOMMU_UAPI_VERSION;
> +}

Also inline functions like this in UAPI headers that actually get
included by userspace programs simply don't work.

\
 
 \ /
  Last update: 2020-03-26 10:23    [W:0.184 / U:0.136 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site