From: Jan Beulich <jbeulich@suse.com>
To: Julien Grall <julien@xen.org>
Cc: "Andrew Cooper" <andrew.cooper3@citrix.com>,
"George Dunlap" <george.dunlap@citrix.com>,
"Ian Jackson" <iwj@xenproject.org>,
"Stefano Stabellini" <sstabellini@kernel.org>,
"Wei Liu" <wl@xen.org>, "Roger Pau Monné" <roger.pau@citrix.com>,
"xen-devel@lists.xenproject.org" <xen-devel@lists.xenproject.org>
Subject: Re: [PATCH 02/23] lib: move 64-bit div/mod compiler helpers
Date: Thu, 1 Apr 2021 17:23:19 +0200 [thread overview]
Message-ID: <0ddcecbb-dc42-ba4e-fccc-6988c7e54456@suse.com> (raw)
In-Reply-To: <008a8b14-8f58-2127-9e97-87c696e07b5e@xen.org>
On 01.04.2021 16:56, Julien Grall wrote:
> On 01/04/2021 11:19, Jan Beulich wrote:
>> --- a/xen/common/lib.c
>> +++ b/xen/lib/divmod.c
>> @@ -40,7 +40,6 @@
>> * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
>> * SUCH DAMAGE.
>> */
>> -#if BITS_PER_LONG == 32
>
> In theory BITS_PER_LONG == 32 is not quite the same as 32-bit arch. Can
> you clarify whether this code is necessary on 64-bit arch where long is
> only 32-bit.
Likely the compiler can get away without invoking these helpers, so
the code would remain unused. I'm uncertain whether CONFIG_64BIT
ought to be set for such an architecture, as we assume sizeof(long)
== sizeof(void*), and hence pointers would then need to be 32-bit
as well there.
Jan
next prev parent reply other threads:[~2021-04-01 15:23 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-01 10:14 [PATCH 00/23] further population of xen/lib/ Jan Beulich
2021-04-01 10:19 ` [PATCH 01/23] lib: move muldiv64() Jan Beulich
2021-04-15 10:00 ` Ping (x86): " Jan Beulich
2021-04-15 12:46 ` Roger Pau Monné
2021-04-01 10:19 ` [PATCH 02/23] lib: move 64-bit div/mod compiler helpers Jan Beulich
2021-04-01 14:56 ` Julien Grall
2021-04-01 15:23 ` Jan Beulich [this message]
2021-04-06 19:34 ` Julien Grall
2021-04-07 8:33 ` Jan Beulich
2021-04-07 14:06 ` Julien Grall
2021-04-01 10:20 ` [PATCH 03/23] string: drop redundant declarations Jan Beulich
2021-04-01 14:59 ` Julien Grall
2021-04-01 10:20 ` [PATCH 04/23] lib: move memset() Jan Beulich
2021-04-01 10:21 ` [PATCH 05/23] lib: move memcpy() Jan Beulich
2021-04-01 10:21 ` [PATCH 06/23] lib: move memmove() Jan Beulich
2021-04-01 10:22 ` [PATCH 07/23] lib: move memcmp() Jan Beulich
2021-04-01 10:22 ` [PATCH 08/23] lib: move memchr() Jan Beulich
2021-04-01 10:23 ` [PATCH 09/23] lib: move memchr_inv() Jan Beulich
2021-04-01 10:23 ` [PATCH 10/23] lib: move strlen() Jan Beulich
2021-04-01 10:23 ` [PATCH 11/23] lib: move strnlen() Jan Beulich
2021-04-01 10:24 ` [PATCH 12/23] lib: move strcmp() Jan Beulich
2021-04-01 10:25 ` [PATCH 13/23] lib: move strncmp() Jan Beulich
2021-04-01 10:25 ` [PATCH 14/23] lib: move strlcpy() Jan Beulich
2021-04-01 10:25 ` [PATCH 15/23] lib: move strlcat() Jan Beulich
2021-04-01 10:25 ` [PATCH 16/23] lib: move strchr() Jan Beulich
2021-04-01 10:26 ` [PATCH 17/23] lib: move strrchr() Jan Beulich
2021-04-01 10:26 ` [PATCH 18/23] lib: move strstr() Jan Beulich
2021-04-01 10:26 ` [PATCH 19/23] lib: move strcasecmp() Jan Beulich
2021-04-01 10:27 ` [PATCH 20/23] lib: move/rename strnicmp() to strncasecmp() Jan Beulich
2021-04-01 10:27 ` [PATCH 21/23] lib: move strspn() Jan Beulich
2021-04-01 10:28 ` [PATCH 22/23] lib: move strpbrk() Jan Beulich
2021-04-01 10:28 ` [PATCH 23/23] lib: move strsep() Jan Beulich
2021-04-01 11:54 ` [PATCH 00/23] further population of xen/lib/ Julien Grall
2021-04-01 13:43 ` Jan Beulich
2021-04-01 14:04 ` Julien Grall
2021-04-01 14:27 ` Jan Beulich
2021-04-01 14:55 ` Julien Grall
2021-04-01 15:25 ` Jan Beulich
2021-04-01 15:32 ` Julien Grall
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=0ddcecbb-dc42-ba4e-fccc-6988c7e54456@suse.com \
--to=jbeulich@suse.com \
--cc=andrew.cooper3@citrix.com \
--cc=george.dunlap@citrix.com \
--cc=iwj@xenproject.org \
--cc=julien@xen.org \
--cc=roger.pau@citrix.com \
--cc=sstabellini@kernel.org \
--cc=wl@xen.org \
--cc=xen-devel@lists.xenproject.org \
/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).