From: Marcelo Tosatti <marcelo.tosatti@cyclades.com>
To: hjl@lucon.org, arjan@redhat.com, torvalds@osdl.org
Cc: linux-kernel@vger.kernel.org
Subject: [PATCH] save 4 bytes in "thread_struct" by changing fs/gs to "unsigned short"
Date: Sun, 5 Jun 2005 15:51:51 -0300 [thread overview]
Message-ID: <20050605185151.GA19232@logos.cnet> (raw)
Hi HJLu, Linus, Arjan,
Now that all users of fs and gs fields of "thread_struct" have been switched
to use "mov" instead of "movl" (newer binutils requirement), why not save
4 bytes switching those fields to 16-bit data types.
No big deal, but as we say around here, "grain by grain the chicken gets fat".
--- a/include/asm-i386/processor.h.orig 2005-06-05 20:11:00.000000000 -0300
+++ b/include/asm-i386/processor.h 2005-06-05 20:11:44.000000000 -0300
@@ -439,8 +439,8 @@ struct thread_struct {
unsigned long sysenter_cs;
unsigned long eip;
unsigned long esp;
- unsigned long fs;
- unsigned long gs;
+ unsigned short fs;
+ unsigned short gs;
/* Hardware debugging registers */
unsigned long debugreg[8]; /* %%db0-7 debug registers */
/* fault info */
reply other threads:[~2005-06-06 0:12 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
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=20050605185151.GA19232@logos.cnet \
--to=marcelo.tosatti@cyclades.com \
--cc=arjan@redhat.com \
--cc=hjl@lucon.org \
--cc=linux-kernel@vger.kernel.org \
--cc=torvalds@osdl.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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.