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From: "Uwe Kleine-König" <uwe@kleine-koenig.org>
To: Ahmad Fatoum <a.fatoum@pengutronix.de>
Cc: barebox@lists.infradead.org
Subject: Re: [PATCH 1/4] scripts/make_fit: factor dtb file name into configuration name
Date: Tue, 18 Mar 2025 12:33:30 +0100	[thread overview]
Message-ID: <7gm47as3wubmlxwg3o64zh2w4sgi3zwzpog5z6vuxdhctykks4@nrpltcjzdcsk> (raw)
In-Reply-To: <a3235700-b02b-4870-ba19-b401d6e36600@pengutronix.de>

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Hello,

On Tue, Mar 18, 2025 at 12:27:26PM +0100, Ahmad Fatoum wrote:
> Hello Uwe,
> 
> On 3/18/25 12:03, Uwe Kleine-König wrote:
> > On Tue, Mar 18, 2025 at 09:25:04AM +0100, Ahmad Fatoum wrote:
> >>      fsw.end_node()
> >> -    seq = 0
> >>      with fsw.add_node('configurations'):
> >> -        for model, compat, files in entries:
> >> -            seq += 1
> >> -            with fsw.add_node(f'conf-{seq}'):
> >> +        for dtbname, model, compat, files in entries:
> >> +            with fsw.add_node(f'conf-{dtbname}'):
> > 
> > Funny/surprising semantic of fsw.add_node (i.e. fsw refers to the new
> > node in the with-body?)
> 
> Yes. I suspect it's to ensure that a node end tag is inserted
> after the properties.
> 
> >> -        entries.append([model, compat, files_seq])
> >> +        dtbname = os.path.basename(fname)
> >> +        ndtbs_seen = len(dtbs_seen)
> >> +        dtbs_seen.add(dtbname)
> >> +        if len(dtbs_seen) == ndtbs_seen:
> >> +            raise RuntimeError(f"Duplicate file name '{dtbname}' during FIT creation")
> >> +
> >> +        entries.append([dtbname, model, compat, files_seq])
> > 
> > 	dtbname = os.path.basename(fname)
> > 	if dtbname in dtbs_seen:
> > 	    raise RuntimeError(...)
> > 	dtbs_seen.add(dtbname)
> > 	entries.append(...)
> > 
> > looks more pythonic (to me).
> 
> I dislike iterating twice over the dtbs. I wrote it this way,
> because I assumed calling len on the set is O(1).

I would expect that both `dtbname in dtbs_seen` and
`dtbs_seen.add(dtbname)` is O(1) (in the absense of hash collisions).

Best regards
Uwe

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  reply	other threads:[~2025-03-18 11:34 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-03-18  8:25 Ahmad Fatoum
2025-03-18  8:25 ` [PATCH 2/4] amba: drop unused hepers for creating AMBA devices outside OF Ahmad Fatoum
2025-03-18 10:53   ` Uwe Kleine-König
2025-03-18  8:25 ` [PATCH 3/4] amba: support masking data abort during identification Ahmad Fatoum
2025-03-18 11:04   ` Sascha Hauer
2025-03-18 11:24     ` Ahmad Fatoum
2025-03-18  8:25 ` [PATCH 4/4] ARM: qemu: mask data aborts during AMBA identification Ahmad Fatoum
2025-03-18 11:07   ` Sascha Hauer
2025-03-18 11:03 ` [PATCH 1/4] scripts/make_fit: factor dtb file name into configuration name Uwe Kleine-König
2025-03-18 11:27   ` Ahmad Fatoum
2025-03-18 11:33     ` Uwe Kleine-König [this message]
2025-03-18 11:07 ` Sascha Hauer

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