From: Alexander Lobakin <aleksander.lobakin@intel.com>
To: Yury Norov <yury.norov@gmail.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Rasmus Villemoes <linux@rasmusvillemoes.dk>,
Alexander Potapenko <glider@google.com>,
"Jakub Kicinski" <kuba@kernel.org>,
Eric Dumazet <edumazet@google.com>,
David Ahern <dsahern@kernel.org>,
Przemek Kitszel <przemyslaw.kitszel@intel.com>,
"Simon Horman" <simon.horman@corigine.com>,
<netdev@vger.kernel.org>, <linux-btrfs@vger.kernel.org>,
<dm-devel@redhat.com>, <ntfs3@lists.linux.dev>,
<linux-s390@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 03/14] bitops: let the compiler optimize __assign_bit()
Date: Wed, 11 Oct 2023 09:25:50 +0200 [thread overview]
Message-ID: <2924b09c-bf19-4de2-aae4-55752dab24a6@intel.com> (raw)
In-Reply-To: <ZSQn4Mppz9aJgFib@yury-ThinkPad>
From: Yury Norov <yury.norov@gmail.com>
Date: Mon, 9 Oct 2023 09:18:40 -0700
> On Mon, Oct 09, 2023 at 05:10:15PM +0200, Alexander Lobakin wrote:
[...]
>> -static __always_inline void __assign_bit(long nr, volatile unsigned long *addr,
>> - bool value)
>> -{
>> - if (value)
>> - __set_bit(nr, addr);
>> - else
>> - __clear_bit(nr, addr);
>> -}
>> +#define __assign_bit(nr, addr, value) \
>> + ((value) ? __set_bit(nr, addr) : __clear_bit(nr, addr))
>
> Can you protect nr and addr with braces just as well?
> Can you convert the atomic version too, to keep them synchronized ?
+ for both. I didn't convert assign_bit() as I thought it wouldn't give
any optimization improvements, but yeah, let the compiler decide.
>
>>
>> /**
>> * __ptr_set_bit - Set bit in a pointer's value
>> --
>> 2.41.0
Thanks,
Olek
next prev parent reply other threads:[~2023-10-11 7:27 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-09 15:10 [PATCH 00/14] ip_tunnel: convert __be16 tunnel flags to bitmaps Alexander Lobakin
2023-10-09 15:10 ` [PATCH 01/14] bitops: add missing prototype check Alexander Lobakin
2023-10-09 15:10 ` [PATCH 02/14] bitops: make BYTES_TO_BITS() treewide-available Alexander Lobakin
2023-10-09 15:10 ` [PATCH 03/14] bitops: let the compiler optimize __assign_bit() Alexander Lobakin
2023-10-09 16:18 ` Yury Norov
2023-10-11 7:25 ` Alexander Lobakin [this message]
2023-10-09 15:10 ` [PATCH 04/14] linkmode: convert linkmode_{test,set,clear,mod}_bit() to macros Alexander Lobakin
2023-10-09 15:10 ` [PATCH 05/14] s390/cio: rename bitmap_size() -> idset_bitmap_size() Alexander Lobakin
2023-10-09 16:35 ` Yury Norov
2023-10-11 7:28 ` Alexander Lobakin
2023-10-09 15:10 ` [PATCH 06/14] fs/ntfs3: rename bitmap_size() -> ntfs3_bitmap_size() Alexander Lobakin
2023-10-09 16:50 ` Yury Norov
2023-10-11 7:36 ` Alexander Lobakin
2023-10-09 15:10 ` [PATCH 07/14] btrfs: rename bitmap_set_bits() -> btrfs_bitmap_set_bits() Alexander Lobakin
2023-10-09 15:23 ` David Sterba
2023-10-09 15:10 ` [PATCH 08/14] bitmap: introduce generic optimized bitmap_size() Alexander Lobakin
2023-10-09 17:04 ` Yury Norov
2023-10-09 15:10 ` [PATCH 09/14] bitmap: extend bitmap_{get,set}_value8() to bitmap_{get,set}_bits() Alexander Lobakin
2023-10-09 16:31 ` Yury Norov
2023-10-11 9:33 ` Alexander Lobakin
2023-10-11 10:36 ` Andy Shevchenko
2023-10-15 2:20 ` Yury Norov
2023-10-09 15:10 ` [PATCH 10/14] ip_tunnel: use a separate struct to store tunnel params in the kernel Alexander Lobakin
2023-10-09 15:10 ` [PATCH 11/14] ip_tunnel: convert __be16 tunnel flags to bitmaps Alexander Lobakin
2023-10-09 15:10 ` [PATCH 12/14] lib/bitmap: add compile-time test for __assign_bit() optimization Alexander Lobakin
2023-10-09 15:10 ` [PATCH 13/14] lib/bitmap: add tests for bitmap_{get,set}_bits() Alexander Lobakin
2023-10-09 15:10 ` [PATCH 14/14] lib/bitmap: add tests for IP tunnel flags conversion helpers Alexander Lobakin
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=2924b09c-bf19-4de2-aae4-55752dab24a6@intel.com \
--to=aleksander.lobakin@intel.com \
--cc=andriy.shevchenko@linux.intel.com \
--cc=dm-devel@redhat.com \
--cc=dsahern@kernel.org \
--cc=edumazet@google.com \
--cc=glider@google.com \
--cc=kuba@kernel.org \
--cc=linux-btrfs@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-s390@vger.kernel.org \
--cc=linux@rasmusvillemoes.dk \
--cc=netdev@vger.kernel.org \
--cc=ntfs3@lists.linux.dev \
--cc=przemyslaw.kitszel@intel.com \
--cc=simon.horman@corigine.com \
--cc=yury.norov@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).