linux-kernel - Make totalhigh_pages of consistent type.

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Message-Id: <1254908977-12827-1-git-send-email-andreas.fenkart@streamunlimited.com>
Date:	Wed,  7 Oct 2009 11:49:36 +0200
From:	Andreas Fenkart <andreas.fenkart@...eamunlimited.com>
To:	linux-arm-kernel@...ts.infradead.org, linux-mips@...ux-mips.org,
	linux-am33-list@...hat.com, liqin.chen@...plusct.com,
	x86@...nel.org, linux-kernel@...r.kernel.org,
	akpm@...ux-foundation.org
Subject: Make totalhigh_pages of consistent type.

Printing the value of totalhigh_pages requires casting, see
typical print message:

arch/x86/mm/init_32.c:
  printk(KERN_INFO "Memory: %luk/%luk available (%dk kernel code, "
      "%dk reserved, %dk data, %dk init, %ldk highmem)\n",
    nr_free_pages() << (PAGE_SHIFT-10),
    num_physpages << (PAGE_SHIFT-10),
    codesize >> 10,
    reservedpages << (PAGE_SHIFT-10),
    datasize >> 10,
    initsize >> 10,
    (unsigned long)(totalhigh_pages << (PAGE_SHIFT-10)));


The problem is that the type of totalhigh_pages is dependent on
CONFIG_HIGHMEM being set or not.

include/linux/highmem.h:
  #ifdef CONFIG_HIGHMEM
  
  extern unsigned long totalhigh_pages;
  
  #else /* CONFIG_HIGHMEM */
  
 -#define totalhigh_pages 0
 +#define totalhigh_pages 0UL
  ...

The patch changes the define, so that totalhigh_pages is of uniform
type in both cases.

Patch is build-tested on x86_32 and ARM

kind regards

Andreas


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