From: Jeremy Fitzhardinge <jeremy@goop.org>
To: Andrew Morton <akpm@osdl.org>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Stas Sergeev <stsp@aknet.ru>, Zachary Amsden <zach@vmware.com>,
Chuck Ebbert <76306.1226@compuserve.com>,
Jan Beulich <jbeulich@novell.com>, Andi Kleen <ak@suse.de>
Subject: [PATCH 2.6.19-rc1-mm1] espfix Use scaling addressing mode rather than shifting in PER_CPU
Date: Tue, 10 Oct 2006 17:39:18 -0700 [thread overview]
Message-ID: <452C3D36.7020306@goop.org> (raw)
Use the x86 scaling addressing mode rather than shifting to
multiplying by 4 in PER_CPU().
Signed-off-by: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Andrew Morton <akpm@osdl.org>
Cc: Stas Sergeev <stsp@aknet.ru>
Cc: Zachary Amsden <zach@vmware.com>
Cc: Chuck Ebbert <76306.1226@compuserve.com>
Cc: Jan Beulich <jbeulich@novell.com>
Cc: Andi Kleen <ak@muc.de>
diff -r ea4549dd86a4 include/asm-i386/percpu.h
--- a/include/asm-i386/percpu.h Tue Oct 10 16:36:02 2006 -0700
+++ b/include/asm-i386/percpu.h Tue Oct 10 16:37:59 2006 -0700
@@ -19,8 +19,7 @@
*/
#ifdef CONFIG_SMP
#define PER_CPU(var, cpu) \
- shll $2, cpu; \
- movl __per_cpu_offset(cpu), cpu; \
+ movl __per_cpu_offset(,cpu,4), cpu; \
addl $per_cpu__/**/var, cpu;
#else /* ! SMP */
#define PER_CPU(var, cpu) \
reply other threads:[~2006-10-11 0:39 UTC|newest]
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