[PATCH] hppa: Drop old parisc-specific MADV_* constants

[Helge Deller]

On 2/10/23 11:48, Helge Deller wrote:
> On 2/10/23 11:18, Florian Weimer wrote:
>> * Helge Deller via Libc-alpha:
>>
>>> The Linux kernel upstream commit 71bdea6f798b ("parisc: Align parisc
>>> MADV_XXX constants with all other architectures") dropped the
>>> parisc-specific MADV_* values in favour of the same constants as
>>> other architectures. In the same commit a wrapper was added which
>>> translates the old values to the standard MADV_* values to avoid
>>> breakage of existing programs.
>>> This upstream patch has been downported to all stable kernel trees as
>>> well.
>>
>> What about qemu-user?  Maybe it has always worked?
>
> qemu-user was broken before, which is why I noticed that difference at all,
> and which is the reason I came up with the kernel patch.
> I did sent a fix for qemu-user too, which was applied some days ago:
> https://gitlab.com/qemu-project/qemu/-/commit/4530deb1fe81152ae2384a56eb7edb5467f894fa
>
>>> This patch now drops the parisc specific constants from glibc to
>>> allow newly compliled programs to use the standard MADV_* constants.
>>
>> I appreciate the simplification, but I think this needs a NEWS file
>> update, spelling out the required kernel versions on hppa if the madvise
>> function is used.
>
> Maybe add to the "Deprecated and removed features, and other changes affecting compatibility:"
> section something like this?
>
> * In the Linux kernel for the hppa/parisc architecture some of the MADV_ constants
>    were changed to have the same values as the other architectures.
>    New programs compiled with this glibc version and which use the madvise() call will
>    require at least Linux kernels version 6.2, alternatively stable kernels
>    from version 6.1.6, version 5.15.87 or version 5.10.163.

and 5.4.228, 4.19.270, 4.14.303

Helge