From 9884fd8df195fe48d4e1be2279b419be96127cae Mon Sep 17 00:00:00 2001
From: Benjamin LaHaise <bcrl@linux.intel.com>
Date: Wed, 1 Feb 2006 03:05:30 -0800
Subject: [PATCH] [PATCH] Use 32 bit division in slab_put_obj()

Improve the performance of slab_put_obj().  Without the cast, gcc considers
ptrdiff_t a 64 bit signed integer and ends up emitting code to use a full
signed 128 bit divide on EM64T, which is substantially slower than a 32 bit
unsigned divide.

I noticed this when looking at the profile of a case where the slab balance
is just on edge and thrashes back and forth freeing a block.

Signed-off-by: Benjamin LaHaise <benjamin.c.lahaise@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
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