linux-kernel - Re: kismet: WARNING: unmet direct dependencies detected for HUGETLBFS when selected by PPC

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <5528c76d-d8f1-41be-a742-8bafa74c24f9@csgroup.eu>
Date: Thu, 6 Feb 2025 07:30:06 +0100
From: Christophe Leroy <christophe.leroy@...roup.eu>
To: Miaohe Lin <linmiaohe@...wei.com>
Cc: Paul Gazzillo <paul@...zz.com>,
 Necip Fazil Yildiran <fazilyildiran@...il.com>,
 oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
 Andrew Morton <akpm@...ux-foundation.org>,
 Linux Memory Management List <linux-mm@...ck.org>,
 "linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
 kernel test robot <lkp@...el.com>
Subject: Re: kismet: WARNING: unmet direct dependencies detected for HUGETLBFS
 when selected by PPC_8xx



Le 06/02/2025 à 03:08, Miaohe Lin a écrit :
> On 2025/2/6 0:35, Christophe Leroy wrote:
>>
>>
>> Le 05/02/2025 à 03:39, Miaohe Lin a écrit :
>>> On 2025/1/24 6:24, kernel test robot wrote:
>>>> tree:   https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgit.kernel.org%2Fpub%2Fscm%2Flinux%2Fkernel%2Fgit%2Ftorvalds%2Flinux.git&data=05%7C02%7Cchristophe.leroy%40csgroup.eu%7C97f4bcfeef7147c5a46408dd465329e6%7C8b87af7d86474dc78df45f69a2011bb5%7C0%7C0%7C638744045189449604%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=x37VZjFG%2BB1zYyoDGgz4jIyUbSWx%2FCklH%2FgsDLGCW%2F4%3D&reserved=0 master
>>>> head:   d0d106a2bd21499901299160744e5fe9f4c83ddb
>>>> commit: f8142cf94d4737ea0c3baffb3b9bad8addcb9b6b hugetlb: make hugetlb depends on SYSFS or SYSCTL
>>>> date:   2 years, 4 months ago
>>>> config: powerpc-kismet-CONFIG_HUGETLBFS-CONFIG_PPC_8xx-0-0 (https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdownload.01.org%2F0day-ci%2Farchive%2F20250124%2F202501240611.LDmD2nkj-lkp%40intel.com%2Fconfig&data=05%7C02%7Cchristophe.leroy%40csgroup.eu%7C97f4bcfeef7147c5a46408dd465329e6%7C8b87af7d86474dc78df45f69a2011bb5%7C0%7C0%7C638744045189465052%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=QSCbgVZFsu%2BQN1b7xDiPsikJR93kWobuPsa%2BtqG3dZA%3D&reserved=0)
>>>> reproduce: (https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdownload.01.org%2F0day-ci%2Farchive%2F20250124%2F202501240611.LDmD2nkj-lkp%40intel.com%2Freproduce&data=05%7C02%7Cchristophe.leroy%40csgroup.eu%7C97f4bcfeef7147c5a46408dd465329e6%7C8b87af7d86474dc78df45f69a2011bb5%7C0%7C0%7C638744045189472672%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=nT4smogT5pTgqIh7%2FCPD%2FpQsCqaBrxfN%2BtEER7l%2FyLY%3D&reserved=0)
>>>>
>>>> If you fix the issue in a separate patch/commit (i.e. not just a new version of
>>>> the same patch/commit), kindly add following tags
>>>> | Reported-by: kernel test robot <lkp@...el.com>
>>>> | Closes: https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Flore.kernel.org%2Foe-kbuild-all%2F202501240611.LDmD2nkj-lkp%40intel.com%2F&data=05%7C02%7Cchristophe.leroy%40csgroup.eu%7C97f4bcfeef7147c5a46408dd465329e6%7C8b87af7d86474dc78df45f69a2011bb5%7C0%7C0%7C638744045189480482%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=7yBcNLgmgW6BUZ55nHh%2F8fZqHGShaqGDKdotvIQ2Tl8%3D&reserved=0
>>>
>>> Thanks for report. Sorry for late respond. I was on my Spring Festival vacation.
>>>
>>>>
>>>> kismet warnings: (new ones prefixed by >>)
>>>>>> kismet: WARNING: unmet direct dependencies detected for HUGETLBFS when selected by PPC_8xx
>>>>      WARNING: unmet direct dependencies detected for HUGETLBFS
>>>>        Depends on [n]: (X86 || IA64 || SPARC64 || ARCH_SUPPORTS_HUGETLBFS [=y] || BROKEN [=n]) && (SYSFS [=n] || SYSCTL [=n])
>>>>        Selected by [y]:
>>>>        - PPC_8xx [=y] && <choice>
>>>
>>> I am a bit confused. HUGETLBFS depends on SYSFS or SYSCTL. How can it be selected while SYSFS [=n] || SYSCTL [=n]?
>>> Or am I miss something?
>>
>> CONFIG_HUGETLBFS is selected by CONFIG_PPC_8xx, see commit 34536d780683 ("powerpc/8xx: Add a function to early map kernel via huge pages")
> 
> Thanks for your providing. But I'm saying that since HUGETLBFS depends on (SYSFS or SYSCTL), how CONFIG_PPC_8xx succeeds to select it while
> SYSFS and SYSCTL are disabled? I'm not really familiar with Kconfig but I assume Kconfig will confirm that the dependencies are satisfied
> before HUGETLBFS is enabled. Or am I miss something?

I suggest you read https://docs.kernel.org/kbuild/kconfig-language.html

Extract:

Note:
     select should be used with care. select will force a symbol to a 
value without visiting the dependencies. By abusing select you are able 
to select a symbol FOO even if FOO depends on BAR that is not set.

Christophe