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SubjectRe: 2.6.24-rc3-mm1
On Mon, 26 Nov 2007, Randy Dunlap wrote:

> On Tue, 20 Nov 2007 20:45:25 -0800 Andrew Morton wrote:
>
> >
> > ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.24-rc3/2.6.24-rc3-mm1/
>
> allnoconfig on x86_64 gives:
>
> arch/x86/mm/init_64.c:84: error: implicit declaration of function 'pfn_valid'
> mm/page_alloc.c:2533: error: implicit declaration of function 'pfn_valid'
> mm/vmstat.c:518: error: implicit declaration of function 'pfn_valid'
> mm/memory.c:400: error: implicit declaration of function 'pfn_valid'
> drivers/char/mem.c:312: error: implicit declaration of function 'pfn_valid'

Hmmm... CONFIG_SPARSEMEM is not set if you do allnoconfig

config SPARSEMEM
def_bool y
depends on SPARSEMEM_MANUAL

So I guess we need to set SPARSEMEM_MANUAL

But arch/x86/Kconfig has

config SPARSEMEM_MANUAL
bool "Sparse Memory"
depends on ARCH_SPARSEMEM_ENABLE
help
This will be the only option for some systems, including
memory hotplug systems. This is normal.

It needs to be not deselectable for x86_64.

Inserting

def_bool y if X86_64

did not help....
Somehow make menuconfig did not give me an ability to even enable this
again.

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