LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Huang Ying <ying.huang@intel.com>
To: "Eric W. Biederman" <ebiederm@xmission.com>,
	Vivek Goyal <vgoyal@redhat.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Simon Horman <horms@verge.net.au>,
	Ian Campbell <Ian.Campbell@citrix.com>,
	Magnus Damm <magnus.damm@gmail.com>
Cc: linux-kernel@vger.kernel.org, kexec@lists.infradead.org
Subject: [PATCH -mm 1/3 -v3] kexec/i386: remove PAGE_SIZE alignment from relocate_kernel
Date: Thu, 30 Oct 2008 16:17:01 +0800	[thread overview]
Message-ID: <1225354621.24095.111.camel@yhuang-dev.sh.intel.com> (raw)

[-- Attachment #1: Type: text/plain, Size: 811 bytes --]

This patch removes PAGE_SIZE alignment from relocate_kernel(). Before
kexec jump patches are merged, control page is mapped to
relocate_kernel in kexec page tables, so relocate_kernel must be
PAGE_SIZE aligned. Now, control page is mapped to identity mapped
address, so relocate_kernel need not to be PAGE_SIZE aligned any
more. This can reduce a few KB from kernel text segement.

Signed-off-by: Huang Ying <ying.huang@intel.com>

---
 arch/x86/kernel/relocate_kernel_32.S |    1 -
 1 file changed, 1 deletion(-)

--- a/arch/x86/kernel/relocate_kernel_32.S
+++ b/arch/x86/kernel/relocate_kernel_32.S
@@ -39,7 +39,6 @@
 #define CP_PA_BACKUP_PAGES_MAP	DATA(0x1c)
 
 	.text
-	.align PAGE_SIZE
 	.globl relocate_kernel
 relocate_kernel:
 	/* Save the CPU context, used for jumping back */


[-- Attachment #2: This is a digitally signed message part --]
[-- Type: application/pgp-signature, Size: 197 bytes --]

                 reply	other threads:[~2008-10-30  8:17 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=1225354621.24095.111.camel@yhuang-dev.sh.intel.com \
    --to=ying.huang@intel.com \
    --cc=Ian.Campbell@citrix.com \
    --cc=akpm@linux-foundation.org \
    --cc=ebiederm@xmission.com \
    --cc=horms@verge.net.au \
    --cc=kexec@lists.infradead.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=magnus.damm@gmail.com \
    --cc=vgoyal@redhat.com \
    --subject='Re: [PATCH -mm 1/3 -v3] kexec/i386: remove PAGE_SIZE alignment from relocate_kernel' \
    /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

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).