linux-kernel - Re: [PATCH v2 6/6] selftests/mm: remove local __NR

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Message-ID: <12502c05-be51-4c9d-9cb7-5a40ba1fe307@nvidia.com>
Date: Wed, 12 Feb 2025 14:31:28 -0800
From: John Hubbard <jhubbard@...dia.com>
To: Dave Hansen <dave.hansen@...el.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>, David Hildenbrand
 <david@...hat.com>, 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 6/6] selftests/mm: remove local __NR_* definitions

On 2/12/25 12:34 PM, Dave Hansen wrote:
> Hi John,
> 
> On 6/13/24 19:30, John Hubbard wrote:
>> --- a/tools/testing/selftests/mm/protection_keys.c
>> +++ b/tools/testing/selftests/mm/protection_keys.c
>> @@ -42,7 +42,7 @@
>>   #include <sys/wait.h>
>>   #include <sys/stat.h>
>>   #include <fcntl.h>
>> -#include <unistd.h>
>> +#include <linux/unistd.h>
>>   #include <sys/ptrace.h>
>>   #include <setjmp.h>
> 
> I'm not quite sure how but this broke the protection_keys.c selftest for
> me. Before this commit (a5c6bc590094a1a73cf6fa3f505e1945d2bf2461) things
> are fine.  But after, I get:
> 
> 	running PKEY tests for unsupported CPU/OS
> 
> The "unsupported" test just makes a pkey_alloc() syscall. It's probably
> calling the wrong syscall number or something.
> 
> I think it's still broken in mainline. What's the right fix?

omg I think this is an asm-generic include mistake, I'll check
on it in an hour or so, in more depth.

thanks,
-- 
John Hubbard