From: KOSAKI Motohiro Date: Wed, 25 May 2011 00:12:15 +0000 (-0700) Subject: mm: convert mm->cpu_vm_cpumask into cpumask_var_t X-Git-Tag: v3.0-rc1~254 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=de03c72cfce5b263a674d04348b58475ec50163c;p=pandora-kernel.git mm: convert mm->cpu_vm_cpumask into cpumask_var_t cpumask_t is very big struct and cpu_vm_mask is placed wrong position. It might lead to reduce cache hit ratio. This patch has two change. 1) Move the place of cpumask into last of mm_struct. Because usually cpumask is accessed only front bits when the system has cpu-hotplug capability 2) Convert cpu_vm_mask into cpumask_var_t. It may help to reduce memory footprint if cpumask_size() will use nr_cpumask_bits properly in future. In addition, this patch change the name of cpu_vm_mask with cpu_vm_mask_var. It may help to detect out of tree cpu_vm_mask users. This patch has no functional change. [akpm@linux-foundation.org: build fix] [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: KOSAKI Motohiro Cc: David Howells Cc: Koichi Yasutake Cc: Hugh Dickins Cc: Chris Metcalf Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- Reading git-diff-tree failed