Re: [PATCH v2] mm: remove redundant __GFP_NOWARN

[Vishal Moola (Oracle)]

On Tue, Aug 12, 2025 at 05:46:47PM +0100, Lorenzo Stoakes wrote:
> On Tue, Aug 12, 2025 at 09:52:25PM +0800, Qianfeng Rong wrote:
> > Commit 16f5dfbc851b ("gfp: include __GFP_NOWARN in GFP_NOWAIT") made
> > GFP_NOWAIT implicitly include __GFP_NOWARN.
> >
> > Therefore, explicit __GFP_NOWARN combined with GFP_NOWAIT (e.g.,
> > `GFP_NOWAIT | __GFP_NOWARN`) is now redundant.  Let's clean up these
> > redundant flags across subsystems.
> >
> > No functional changes.
> >
> > Reviewed-by: Harry Yoo <harry.yoo@xxxxxxxxxx>
> > Signed-off-by: Qianfeng Rong <rongqianfeng@xxxxxxxx>
> 
> LGTM, I wonder if there are other such redundancies in the kernel?

Looks like theres a lot left for this specific case. At least 48 show up
that are spread out across subsystems when running 'git grep
"GFP_NOWAIT.*GFP_NOWARN"'.

I think they should be cleaned up in sets per-subsystem to minimize
merge conflicts, as suggested in the commit mentioned above (16f5dfbc851b).