Re: Patch "x86/xen: attempt to inflate the memory balloon on PVH" has been added to the 6.1-stable tree

Re: Patch "x86/xen: attempt to inflate the memory balloon on PVH" has been added to the 6.1-stable tree

[Greg KH]

On Thu, May 09, 2024 at 01:36:36PM -0400, Sasha Levin wrote:
> This is a note to let you know that I've just added the patch titled
> 
>     x86/xen: attempt to inflate the memory balloon on PVH
> 
> to the 6.1-stable tree which can be found at:
>     http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
> 
> The filename of the patch is:
>      x86-xen-attempt-to-inflate-the-memory-balloon-on-pvh.patch
> and it can be found in the queue-6.1 subdirectory.
> 
> If you, or anyone else, feels it should not be added to the stable tree,
> please let <stable@vger.kernel.org> know about it.

This breaks the build on 6.1.y kernels:

In file included from ./include/linux/ioport.h:15,
                 from ./include/linux/acpi.h:12,
                 from arch/x86/xen/enlighten_pvh.c:2:
arch/x86/xen/enlighten_pvh.c: In function ‘xen_reserve_extra_memory’:
./include/linux/minmax.h:20:35: error: comparison of distinct pointer types lacks a cast [-Werror]
   20 |         (!!(sizeof((typeof(x) *)1 == (typeof(y) *)1)))
      |                                   ^~
./include/linux/minmax.h:26:18: note: in expansion of macro ‘__typecheck’
   26 |                 (__typecheck(x, y) && __no_side_effects(x, y))
      |                  ^~~~~~~~~~~
./include/linux/minmax.h:36:31: note: in expansion of macro ‘__safe_cmp’
   36 |         __builtin_choose_expr(__safe_cmp(x, y), \
      |                               ^~~~~~~~~~
./include/linux/minmax.h:45:25: note: in expansion of macro ‘__careful_cmp’
   45 | #define min(x, y)       __careful_cmp(x, y, <)
      |                         ^~~~~~~~~~~~~
arch/x86/xen/enlighten_pvh.c:117:25: note: in expansion of macro ‘min’
  117 |                 pages = min(extra_pages,
      |                         ^~~
cc1: all warnings being treated as errors


So I'm dropping it for now.

thanks,

greg k-h