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Sender: Guenter Roeck <groeck7@gmail.com>
To:     Linus Torvalds <torvalds@linux-foundation.org>
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From:   Guenter Roeck <linux@roeck-us.net>
Subject: Re: [PATCH 4/4] alpha: Use absolute_pointer for strcmp on fixed
 memory location
Message-ID: <0f36c218-d79c-145f-3368-7456dd39a3f2@roeck-us.net>
Date:   Sun, 12 Sep 2021 13:37:26 -0700
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On 9/12/21 12:13 PM, Linus Torvalds wrote:
> On Sun, Sep 12, 2021 at 9:02 AM Guenter Roeck <linux@roeck-us.net> wrote:
>>
>> -       if (strcmp(COMMAND_LINE, "INSTALL") == 0) {
>> +       if (strcmp(absolute_pointer(COMMAND_LINE), "INSTALL") == 0) {
> 
> Again, this feels very much like treating the symptoms, not actually
> fixing the real issue.
> 
> It's COMMAND_LINE itself that should have been fixed up, not that one use of it.
> 
> Because the only reason you didn't get a warning from later uses is
> that 'strcmp()' is doing compiler-specific magic. You're just delaying
> the inevitable warnings about the other uses of that thing.
> 

COMMAND_LINE is, for whatever reason, defined in
arch/alpha/include/uapi/asm/setup.h, ie in the uapi.

Can I even touch that ?

Guenter