linux-kernel - Improved Swapping Method In sort.c

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Message-ID: <988568.21908.qm@web94102.mail.in2.yahoo.com>
Date:	Wed, 30 Apr 2008 22:39:14 +0530 (IST)
From:	Soumyadip Das Mahapatra <dip_kernel@...oo.co.in>
To:	linux-kernel@...r.kernel.org
Subject: Improved Swapping Method In sort.c

Hello everybody,
The swapping method (in function void u32_swap() line no.. 14 to 16) in lib/sort.c can be improved by using the following code
*(u32 *)b ^= *(u32 *)a ^= *(u32 *)b ^= *(u32 *)a instead of the code given. This code
is not using third variable thus not consuming another memory. And I dont see any significance in
using *int size* argument. so the function should be
static void u32_swap(void *a, void *b)
{
    *(u32 *)b ^= *(u32 *)a ^= *(u32 *)b ^= *(u32 *)a;
}




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