From: Guenter Roeck <linux@roeck-us.net>
To: Max Filippov <jcmvbkbc@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Masahiro Yamada <masahiroy@kernel.org>,
"open list:TENSILICA XTENSA PORT (xtensa)"
<linux-xtensa@linux-xtensa.org>,
LKML <linux-kernel@vger.kernel.org>,
Chris Zankel <chris@zankel.net>
Subject: Re: [PATCH] xtensa: Increase size of gcc stack frame check
Date: Sat, 11 Sep 2021 21:02:47 -0700 [thread overview]
Message-ID: <49f8f332-a964-5b98-64c6-9fa5d028731a@roeck-us.net> (raw)
In-Reply-To: <CAMo8BfJ8f+4AmBD1B7J9vOp0xQbB=zRW-NyGZP6gTPTA-74OPQ@mail.gmail.com>
On 9/11/21 8:05 PM, Max Filippov wrote:
> On Sat, Sep 11, 2021 at 7:52 PM Guenter Roeck <linux@roeck-us.net> wrote:
>>
>> xtensa frame size is larger than the frame size for almost all other
>> architectures. This results in more than 50 "the frame size of <n> is
>> larger than 1024 bytes" errors when trying to build xtensa:allmodconfig.
>>
>> Increase frame size for xtensa to 1536 bytes to avoid compile errors
>> due to frame size limits.
>>
>> Cc: Chris Zankel <chris@zankel.net>
>> Cc: Max Filippov <jcmvbkbc@gmail.com>
>> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
>> ---
>> lib/Kconfig.debug | 2 +-
>> 1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
>> index ed4a31e34098..afad11e57d6b 100644
>> --- a/lib/Kconfig.debug
>> +++ b/lib/Kconfig.debug
>> @@ -346,7 +346,7 @@ config FRAME_WARN
>> int "Warn for stack frames larger than"
>> range 0 8192
>> default 2048 if GCC_PLUGIN_LATENT_ENTROPY
>> - default 1536 if (!64BIT && PARISC)
>> + default 1536 if (!64BIT && (PARISC || XTENSA))
>> default 1024 if (!64BIT && !PARISC)
>
> Shouldn't that line also be changed to
> default 1024 if (!64BIT && !(PARISC || XTENSA))
> ?
I could do that, but I tested it and it looks like the evaluation
is top-down, so it didn't seem necessary or useful. For example,
the default value is 2048 for 32-bit systems (such as arm, riscv32,
or i386) if GCC_PLUGIN_LATENT_ENTROPY is enabled, even though the
line with the default of 1024 matches as well.
Thanks,
Guenter
next prev parent reply other threads:[~2021-09-12 4:02 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-12 2:52 [PATCH] xtensa: Increase size of gcc stack frame check Guenter Roeck
2021-09-12 3:05 ` Max Filippov
2021-09-12 4:02 ` Guenter Roeck [this message]
2021-09-12 5:16 ` Max Filippov
2021-09-13 15:57 ` David Laight
2021-09-13 16:11 ` Guenter Roeck
2021-09-14 7:04 ` Max Filippov
2021-09-14 14:02 ` Guenter Roeck
2021-09-14 17:24 ` Max Filippov
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