linux-kernel - Re: [PATCH v2 1/2] [powerpc] Change memory_limit from phys_addr

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Date:	Fri, 07 Sep 2012 11:35:12 +1000
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	"Suzuki K. Poulose" <suzuki@...ibm.com>
Cc:	linuxppc-dev@...ts.ozlabs.org, mahesh@...ux.vnet.ibm.com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/2] [powerpc] Change memory_limit from phys_addr_t
 to unsigned long long

On Tue, 2012-08-21 at 17:12 +0530, Suzuki K. Poulose wrote:
> There are some device-tree nodes, whose values are of type phys_addr_t.
> The phys_addr_t is variable sized based on the CONFIG_PHSY_T_64BIT.
> 
> Change these to a fixed unsigned long long for consistency.
> 
> This patch does the change only for memory_limit.
> 
> The following is a list of such variables which need the change:
> 
>  1) kernel_end, crashk_size - in arch/powerpc/kernel/machine_kexec.c
> 
>  2) (struct resource *)crashk_res.start - We could export a local static
>     variable from machine_kexec.c.
> 
> Changing the above values might break the kexec-tools. So, I will
> fix kexec-tools first to handle the different sized values and then change
>  the above.
> 
> Suggested-by: Benjamin Herrenschmidt <benh@...nel.crashing.org>
> Signed-off-by: Suzuki K. Poulose <suzuki@...ibm.com>
> ---

Breaks the build on some configs (with 32-bit phys_addr_t):

/home/benh/linux-powerpc-test/arch/powerpc/kernel/prom.c: In function
'early_init_devtree':
/home/benh/linux-powerpc-test/arch/powerpc/kernel/prom.c:664:25: error:
comparison of distinct pointer types lacks a cast

I'm fixing that myself this time but please be more careful.

Cheers,
Ben.


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