linux-kernel - [PATCH] printk.c: use ints instead of longs for logbuf index

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Message-Id: <200711181932.12588.vda.linux@googlemail.com>
Date:	Sun, 18 Nov 2007 19:32:12 -0800
From:	Denys Vlasenko <vda.linux@...glemail.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH] printk.c: use ints instead of longs for logbuf index

Hi Andrew,

This patch stops using unsigned _longs_ for printk
buffer indexes. Log buffer is way smaller than 2 gigabytes
and unsigned ints will work too . Indeed, they do work nicely
on all 32-bit platforms where longs and ints are the same.

With this patch, we have following size savings on amd64:

   text    data     bss     dec     hex filename
   5997     313   17736   24046    5dee 2.6.23.1.t64/kernel/printk.o
   5858     313   17700   23871    5d3f 2.6.23.1.printk.t64/kernel/printk.o

Please take this patch into -mm.

Signed-off-by: Denys Vlasenko <vda.linux@...glemail.com>
--
vda

View attachment "linux-2.6.23.1.printk.diff" of type "text/x-diff" (4234 bytes)