linux-kernel - Re: [PATCH v2 1/6] selftests/mm: mseal, self_elf: fix missing __NR

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Date: Fri, 14 Jun 2024 14:41:47 +0200
From: David Hildenbrand <david@...hat.com>
To: John Hubbard <jhubbard@...dia.com>,
 Andrew Morton <akpm@...ux-foundation.org>, Jeff Xu <jeffxu@...omium.org>,
 Shuah Khan <shuah@...nel.org>
Cc: Andrei Vagin <avagin@...gle.com>,
 Axel Rasmussen <axelrasmussen@...gle.com>,
 Christian Brauner <brauner@...nel.org>, Kees Cook <kees@...nel.org>,
 Kent Overstreet <kent.overstreet@...ux.dev>,
 "Liam R . Howlett" <Liam.Howlett@...cle.com>,
 Muhammad Usama Anjum <usama.anjum@...labora.com>,
 Peter Xu <peterx@...hat.com>, Rich Felker <dalias@...c.org>,
 linux-mm@...ck.org, linux-kselftest@...r.kernel.org,
 LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 1/6] selftests/mm: mseal, self_elf: fix missing
 __NR_mseal

On 14.06.24 14:28, David Hildenbrand wrote:
> On 14.06.24 04:30, John Hubbard wrote:
>> The selftests/mm build isn't exactly "broken", according to the current
>> documentation, which still claims that one must run "make headers",
>> before building the kselftests. However, according to the new plan to
>> get rid of that requirement [1], they are future-broken: attempting to
>> build selftests/mm *without* first running "make headers" will fail due
>> to not finding __NR_mseal.
>>
>> Therefore,  add ./usr/include/asm/unistd_[32|x32|64].h (created via
>> "make headers") to tools/uapi/, and change the selftests/mm files that
>> require __NR_mseal to include from the correct location. The way to do
>> so is to include <linux/unistd.h> instead of just <unistd.h>.
>>
>> [1] commit e076eaca5906 ("selftests: break the dependency upon local
>> header files")
>>
>> Fixes: 4926c7a52de7 ("selftest mm/mseal memory sealing")
>> Cc: Jeff Xu <jeffxu@...omium.org>
>> Cc: David Hildenbrand <david@...hat.com>
>> Signed-off-by: John Hubbard <jhubbard@...dia.com>
>> ---
> 
> If it works, great

... thinking again, are some of these headers arch-specific (IOW, 
generating them per-arch would result in something slightly different)?

In tools/include/uapi/asm-generic/unistd.h, we already do have 
__NR_mseal ...

-- 
Cheers,

David / dhildenb