Re: [PATCH] perf trace beauty fcntl: Fix build with older kernel headers

[Florian Fainelli]

On 5/13/26 13:58, Ian Rogers wrote:
> On Wed, May 13, 2026 at 12:23 PM Florian Fainelli
> <florian.fainelli@xxxxxxxxxxxx> wrote:
> > Toolchains with older kernel headers that do not include upstream commit
> > c75b1d9421f80f4143e389d2d50ddfc8a28c8c35 ("fs: add fcntl() interface for
> > setting/getting write life time hints") will now fail to build perf due
> > to missing definitions for
> > F_GET_RW_HINT/F_SET_RW_HINT/F_GET_FILE_RW_HINT/F_SET_FILE_RW_HINT.
> >
> > Provide a fallback definition for these when they are not already
> > defined.
>
> This seems fine but the commit you mention was added to Linux 4.13. Is
> there a reason you've run into this problem? The oldest active LTS
> kernel is 4.19.

The toolchain I am using is still on kernel headers 4.9.x, I am 
cognizant this is a very old set of kernel headers, this is specific and 
unique to building for MIPS, our ARM/ARM64 targets are using more modern 
components.
--
Florian