RE: [PATCH 0/7] minmax: reduce compilation time

[David Laight]

From: Lorenzo Stoakes
> Sent: 27 July 2024 19:59
> 
> On Sat, Jul 27, 2024 at 08:08:39AM GMT, David Laight wrote:
> > ...
> > > and it will spit out
> > >
> > >   Longest line is drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c:1136 (2346kB)
> > >      '   ((((((pkt_size) + __builtin_choose_expr((sizeof(int) ==
> > > sizeof(*(8 ? ((void *)((long)((__builtin_...'
> > >
> > > to tell me that we have that insane 2.2 *megabyte* line due to the
> > > MVPP2_SKB_HEADROOM thing, and I should apply this patch:
> > >
> > > -#define MVPP2_SKB_HEADROOM     min(max(XDP_PACKET_HEADROOM, NET_SKB_PAD), 224)
> > > +#define MVPP2_SKB_HEADROOM
> > > MIN_T(int,MAX_T(int,XDP_PACKET_HEADROOM, NET_SKB_PAD), 224)
> > >
> > > to fix it.
> 
> Yeah sorry just saw you had already addresed this Linus... I just went with a
> clamp()_t in my patch.
> 
> >
> > Or (if I've got is right):
> > #define MVPP2_SKB_HEADROOM clamp(XDP_PACKET_HEADROOM, NET_SKB_PAD, 224)
> >
> 
> I'm pretty sure you can clamp_t(int, ...) here safely based on usage.

Why doesn't a plain clamp() work?
The xxx_t() variants really shouldn't be used very often.

	David

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