linux-kernel - Re: [PATCH 1/4] arch/frv: Removing dead RAMKERNEL config option

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Date:	Tue, 10 Aug 2010 12:54:16 +0200
From:	Christian Dietrich <qy03fugy@...d.informatik.uni-erlangen.de>
To:	felipe.balbi@...ia.com
Cc:	David Howells <dhowells@...hat.com>, Tejun Heo <tj@...nel.org>,
	"linux-kernel\@vger.kernel.org" <linux-kernel@...r.kernel.org>,
	"vamos-dev\@i4.informatik.uni-erlangen.de" 
	<vamos-dev@...informatik.uni-erlangen.de>
Subject: Re: [PATCH 1/4] arch/frv: Removing dead RAMKERNEL config option

Felipe Balbi <felipe.balbi@...ia.com> writes:

> Hi,
>
> On Tue, Aug 10, 2010 at 11:11:08AM +0200, ext Christian Dietrich wrote:
>>diff --git a/arch/frv/mm/init.c b/arch/frv/mm/init.c
>>index ed64588..73586ad 100644
>>--- a/arch/frv/mm/init.c
>>+++ b/arch/frv/mm/init.c
>>@@ -170,23 +170,6 @@ void __init mem_init(void)
>>  */
>> void free_initmem(void)
>> {
>>-#if defined(CONFIG_RAMKERNEL) && !defined(CONFIG_PROTECT_KERNEL)
>>-	unsigned long start, end, addr;
>>-
>>-	start = PAGE_ALIGN((unsigned long) &__init_begin);	/* round up */
>>-	end   = ((unsigned long) &__init_end) & PAGE_MASK;	/* round down */
>>-
>>-	/* next to check that the page we free is not a partial page */
>>-	for (addr = start; addr < end; addr += PAGE_SIZE) {
>>-		ClearPageReserved(virt_to_page(addr));
>>-		init_page_count(virt_to_page(addr));
>>-		free_page(addr);
>>-		totalram_pages++;
>>-	}
>>-
>>-	printk("Freeing unused kernel memory: %ldKiB freed (0x%lx - 0x%lx)\n",
>>-	       (end - start) >> 10, start, end);
>>-#endif
>> } /* end free_initmem() */
>
> and now you have an empty function... how about removing the function
> completely and it's uses ?

If you take a look at init/main.c:826 free_initmem() is called. perhaps
this can be resolved with a macro, but if anybody in the future wants to
add some functionality there, he won't be happy after grepping.

greetz didi
-- 
(λ x . x x) (λ x . x x) -- See how beatiful the lambda is
No documentation is better than bad documentation
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