Re: [PATCH v2 5/6] debugfs: add debugfs_create_atomic64_t for atomic64_t

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To: David Laight <David.Laight@xxxxxxxxxx>, "'Christophe Leroy'" <christophe.leroy@xxxxxxxxxx>, "'Luis Chamberlain'" <mcgrof@xxxxxxxxxx>, Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Subject: Re: [PATCH v2 5/6] debugfs: add debugfs_create_atomic64_t for atomic64_t
From: David Hildenbrand <david@xxxxxxxxxx>
Date: Thu, 6 Apr 2023 16:14:49 +0200
Cc: "patches@xxxxxxxxxxxxxxx" <patches@xxxxxxxxxxxxxxx>, "linux-modules@xxxxxxxxxxxxxxx" <linux-modules@xxxxxxxxxxxxxxx>, "linux-mm@xxxxxxxxx" <linux-mm@xxxxxxxxx>, "linux-kernel@xxxxxxxxxxxxxxx" <linux-kernel@xxxxxxxxxxxxxxx>, "pmladek@xxxxxxxx" <pmladek@xxxxxxxx>, "petr.pavlu@xxxxxxxx" <petr.pavlu@xxxxxxxx>, "prarit@xxxxxxxxxx" <prarit@xxxxxxxxxx>, "gregkh@xxxxxxxxxxxxxxxxxxx" <gregkh@xxxxxxxxxxxxxxxxxxx>, "rafael@xxxxxxxxxx" <rafael@xxxxxxxxxx>, "tglx@xxxxxxxxxxxxx" <tglx@xxxxxxxxxxxxx>, "peterz@xxxxxxxxxxxxx" <peterz@xxxxxxxxxxxxx>, "song@xxxxxxxxxx" <song@xxxxxxxxxx>, "rppt@xxxxxxxxxx" <rppt@xxxxxxxxxx>, "dave@xxxxxxxxxxxx" <dave@xxxxxxxxxxxx>, "willy@xxxxxxxxxxxxx" <willy@xxxxxxxxxxxxx>, "vbabka@xxxxxxx" <vbabka@xxxxxxx>, "mhocko@xxxxxxxx" <mhocko@xxxxxxxx>, "dave.hansen@xxxxxxxxxxxxxxx" <dave.hansen@xxxxxxxxxxxxxxx>, "colin.i.king@xxxxxxxxx" <colin.i.king@xxxxxxxxx>, "jim.cromie@xxxxxxxxx" <jim.cromie@xxxxxxxxx>, "catalin.marinas@xxxxxxx" <catalin.marinas@xxxxxxx>, "jbaron@xxxxxxxxxx" <jbaron@xxxxxxxxxx>, "rick.p.edgecombe@xxxxxxxxx" <rick.p.edgecombe@xxxxxxxxx>
In-reply-to: <6ba49055a1a343e8b50f808f91438e39@AcuMS.aculab.com>
Organization: Red Hat
References: <20230405022702.753323-1-mcgrof@kernel.org> <20230405022702.753323-6-mcgrof@kernel.org> <CAHk-=whH+OsAY+9qLc9Hz+-W8u=dvD3NLWHemOQpZPcgZa52fA@mail.gmail.com> <ZC2cC+I1KTyD8UcC@bombadil.infradead.org> <ZC2dtI02ZIbjte2l@bombadil.infradead.org> <CAHk-=wiGhHk4u2RRZmJinA4Apb47pXXJPW9cOZ_2-yUqOvaC7Q@mail.gmail.com> <ZC2nbiarELlUVcSj@bombadil.infradead.org> <979c8cf9ab2d4fcba811adc0c563b8bb@AcuMS.aculab.com> <48f2c6f2-f776-be29-7d74-67f1b6cf5467@csgroup.eu> <6ba49055a1a343e8b50f808f91438e39@AcuMS.aculab.com>
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On 06.04.23 15:48, David Laight wrote:

From: Christophe Leroy

Sent: 06 April 2023 14:38

...

On powerpc 'long long' is 64 bits on both PPC32 and PPC64.


It probably in on x85-64 as well.
By brain is getting frazzled.

On 64bit long long ought to be 128bit.

I might have been living under a rock, but the only requirement I amaware of is for long long to be at least 64bit wide.


AFAIK, that is also the case on s390x and aarch64.

--
Thanks,

David / dhildenb

References:
- [PATCH v2 0/6] module: avoid userspace pressure on unwanted allocations
  - From: Luis Chamberlain
- [PATCH v2 5/6] debugfs: add debugfs_create_atomic64_t for atomic64_t
  - From: Luis Chamberlain
- Re: [PATCH v2 5/6] debugfs: add debugfs_create_atomic64_t for atomic64_t
  - From: Linus Torvalds
- Re: [PATCH v2 5/6] debugfs: add debugfs_create_atomic64_t for atomic64_t
  - From: Luis Chamberlain
- Re: [PATCH v2 5/6] debugfs: add debugfs_create_atomic64_t for atomic64_t
  - From: Luis Chamberlain
- Re: [PATCH v2 5/6] debugfs: add debugfs_create_atomic64_t for atomic64_t
  - From: Linus Torvalds
- Re: [PATCH v2 5/6] debugfs: add debugfs_create_atomic64_t for atomic64_t
  - From: Luis Chamberlain
- RE: [PATCH v2 5/6] debugfs: add debugfs_create_atomic64_t for atomic64_t
  - From: David Laight
- Re: [PATCH v2 5/6] debugfs: add debugfs_create_atomic64_t for atomic64_t
  - From: Christophe Leroy
- RE: [PATCH v2 5/6] debugfs: add debugfs_create_atomic64_t for atomic64_t
  - From: David Laight

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