From: Michael Schmitz <schmitzmic@gmail.com>
To: Geert Uytterhoeven <geert@linux-m68k.org>,
Finn Thain <fthain@linux-m68k.org>
Cc: Andreas Schwab <schwab@linux-m68k.org>,
Linux/m68k <linux-m68k@vger.kernel.org>,
linux-ide@vger.kernel.org, ALeX Kazik <alex@kazik.de>
Subject: Re: [PATCH v1 1/2] m68k: io_mm.h - add APNE 100 MBit support
Date: Fri, 11 Jun 2021 14:15:25 +1200 [thread overview]
Message-ID: <8493043b-818f-db60-2f9f-03fbcc917427@gmail.com> (raw)
In-Reply-To: <CAMuHMdVGoUhs3N3bdOQ2OxQa+69LcK0YOG2HASbFNhD4Qpc2+Q@mail.gmail.com>
Hi Geert,
thanks for the explanation - and thanks Finn and Andreas for clarifying.
I've removed the annotation in v2.
Cheers,
Michael
On 10/06/21 7:32 pm, Geert Uytterhoeven wrote:
> Hi Finn,
>
> On Thu, Jun 10, 2021 at 3:09 AM Finn Thain <fthain@linux-m68k.org> wrote:
>> On Thu, 10 Jun 2021, Michael Schmitz wrote:
>>> On 9/06/21 8:04 pm, Andreas Schwab wrote:
>>>> On Jun 09 2021, Michael Schmitz wrote:
>>>>
>>>>> @@ -136,6 +141,9 @@ static inline u8 __iomem *isa_itb(unsigned long addr)
>>>>> case ISA_TYPE_Q40: return (u8 __iomem *)Q40_ISA_IO_B(addr);
>>>>> #endif
>>>>> #ifdef CONFIG_AMIGA_PCMCIA
>>>>> +#ifdef CONFIG_APNE100MBIT
>>>>> + case ISA_TYPE_AG16: fallthrough;
>>>>> +#endif
>>>>> case ISA_TYPE_AG: return (u8 __iomem *)AG_ISA_IO_B(addr);
>>>> Is the fallthrough annotation really needed?
>>> Just to shut up compiler warnings, and even that I haven't seen myself.
>>>
>>> I have seen a number of patches adding either comments or this annotation in
>>> the core NCR5380 driver (which Finn maintains, who suggested this annotation
>>> to an earlier version of the Q40/Atari io_mm.h patch), so adding annotations
>>> appears to be encouraged now.
>>>
>>> I personally think these annotations are over the top generally, but I've
>>> learned to program when computed goto statements were still en vogue.
>>>
>>> In this particular case, there can be no doubt that the fallthrough is
>>> intentional, so on balance, I'll remove those annotations as well (unless Finn
>>> strongly objects?).
>>>
>> I don't object to removing it. On the contrary, in a previous message I
>> also questioned adding this particular 'fallthrough' (though I did
>> recommended adding a different one).
>>
>> In general, there's no way to predict which static checkers are going to
>> complain about any given line of code. They don't all agree about
>> correctness and they are a moving target, just like fashion or reviewers'
>> preferred code styles.
> AFAIK, they only complain when the switch() operates on an enum,
> and not all enum values are handled.
>
> When operating on an int, there's not enough address space on
> 32-bit machines to handle all cases ;-)
>
> Gr{oetje,eeting}s,
>
> Geert
>
next prev parent reply other threads:[~2021-06-11 2:16 UTC|newest]
Thread overview: 85+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-25 9:06 [PATCH] m68k/mac: Replace macide driver with generic platform driver Finn Thain
2021-04-25 10:25 ` John Paul Adrian Glaubitz
2021-04-26 7:37 ` Finn Thain
2021-04-26 7:48 ` John Paul Adrian Glaubitz
2021-04-27 1:51 ` Michael Schmitz
2021-04-27 3:47 ` Finn Thain
2021-04-27 19:54 ` Michael Schmitz
2021-04-28 6:53 ` Geert Uytterhoeven
2021-06-01 3:32 ` Michael Schmitz
2021-06-01 7:55 ` Michael Schmitz
2021-06-01 8:43 ` Geert Uytterhoeven
2021-06-01 21:05 ` Michael Schmitz
2021-06-02 5:21 ` [PATCH RFC 0/2] Fix m68k multiplatform ISA support Michael Schmitz
2021-06-02 5:21 ` [PATCH RFC 1/2] m68k: io_mm.h: conditionalize ISA address translation on Atari Michael Schmitz
2021-06-03 8:23 ` Finn Thain
2021-06-04 0:19 ` Michael Schmitz
2021-06-04 5:55 ` Finn Thain
2021-06-04 7:30 ` Michael Schmitz
2021-06-04 22:49 ` Brad Boyer
2021-06-05 1:41 ` Michael Schmitz
2021-06-05 6:04 ` Brad Boyer
2021-06-05 22:05 ` Michael Schmitz
2021-06-06 2:18 ` Michael Schmitz
2021-06-06 4:53 ` Finn Thain
2021-06-06 5:42 ` Michael Schmitz
2021-06-06 23:51 ` Brad Boyer
2021-06-06 5:54 ` [PATCH RFC 0/2] Add APNE PCMCIA 100 Mbit support Michael Schmitz
2021-06-06 5:54 ` [PATCH RFC 1/2] m68k: io_mm.h - add APNE 100 MBit support Michael Schmitz
2021-06-07 8:01 ` Geert Uytterhoeven
2021-06-07 8:20 ` Michael Schmitz
2021-06-07 11:15 ` Geert Uytterhoeven
2021-06-07 19:57 ` Michael Schmitz
2021-06-08 6:42 ` Geert Uytterhoeven
2021-06-08 21:55 ` Michael Schmitz
2021-06-09 6:33 ` Geert Uytterhoeven
2021-06-08 21:56 ` Michael Schmitz
2021-06-06 5:54 ` [PATCH RFC 2/2] net/8390: apne.c - add 100 Mbit support to apne.c driver Michael Schmitz
2021-06-07 8:08 ` Geert Uytterhoeven
2021-06-07 8:40 ` Michael Schmitz
2021-06-07 8:46 ` ALeX Kazik
2021-06-08 3:10 ` Michael Schmitz
2021-06-07 8:37 ` Geert Uytterhoeven
2021-06-07 12:56 ` Geert Uytterhoeven
2021-06-13 21:53 ` Michael Schmitz
2021-06-09 7:36 ` [PATCH v1 0/2] Add APNE PCMCIA 100 Mbit support Michael Schmitz
2021-06-09 7:36 ` [PATCH v1 1/2] m68k: io_mm.h - add APNE 100 MBit support Michael Schmitz
2021-06-09 8:04 ` Andreas Schwab
2021-06-09 21:54 ` Michael Schmitz
2021-06-10 1:09 ` Finn Thain
2021-06-10 7:32 ` Geert Uytterhoeven
2021-06-11 2:15 ` Michael Schmitz [this message]
2021-06-10 8:53 ` Andreas Schwab
2021-06-09 7:36 ` [PATCH v1 2/2] net/8390: apne.c - add 100 Mbit support to apne.c driver Michael Schmitz
2021-06-10 2:09 ` [PATCH v2 0/2] Add APNE PCMCIA 100 Mbit support Michael Schmitz
2021-06-10 2:09 ` [PATCH v2 1/2] m68k: io_mm.h - add APNE 100 MBit support Michael Schmitz
2021-06-10 2:09 ` [PATCH v2 2/2] net/8390: apne.c - add 100 Mbit support to apne.c driver Michael Schmitz
2021-06-16 21:11 ` [PATCH v2 0/2] Add APNE PCMCIA 100 Mbit support ALeX Kazik
2021-06-17 1:10 ` Michael Schmitz
2021-06-04 7:54 ` [PATCH RFC 1/2] m68k: io_mm.h: conditionalize ISA address translation on Atari Geert Uytterhoeven
2021-06-04 21:36 ` Michael Schmitz
2021-06-04 23:31 ` Finn Thain
2021-06-05 0:24 ` Finn Thain
2021-06-05 3:48 ` Michael Schmitz
2021-06-09 6:35 ` Geert Uytterhoeven
2021-06-09 7:20 ` Michael Schmitz
2021-06-02 5:21 ` [PATCH RFC 2/2] m68k: setup_mm.c: set isa_sex for Atari if ATARI_ROM_ISA not used Michael Schmitz
2021-06-02 7:09 ` Geert Uytterhoeven
2021-06-02 8:21 ` Michael Schmitz
2021-06-03 8:29 ` Finn Thain
2021-06-04 3:02 ` Michael Schmitz
2021-06-03 3:43 ` [PATCH RFC 0/2] Fix m68k multiplatform ISA support Michael Schmitz
2021-06-03 7:09 ` Geert Uytterhoeven
2021-06-04 0:22 ` Michael Schmitz
2021-06-06 5:28 ` [PATCH] m68k: Fix " Michael Schmitz
2021-06-07 7:49 ` Geert Uytterhoeven
2021-06-07 8:17 ` Michael Schmitz
2021-06-09 7:22 ` [PATCH v2] m68k: io_mm.h: conditionalize ISA address translation on Atari Michael Schmitz
2021-06-09 7:57 ` Andreas Schwab
2021-06-09 21:43 ` Michael Schmitz
2021-06-10 2:04 ` [PATCH v3] " Michael Schmitz
2021-04-27 8:11 ` [PATCH] m68k/mac: Replace macide driver with generic platform driver Sergei Shtylyov
2021-04-27 8:36 ` John Paul Adrian Glaubitz
2021-04-27 19:29 ` Michael Schmitz
2021-04-25 22:24 ` Michael Schmitz
2021-04-26 7:35 ` Finn Thain
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