Re: [Patch] mm: make CONFIG_NUMA depend on CONFIG_SYSFS

From: Cong Wang
Date: Tue Jul 19 2011 - 02:08:08 EST

ä 2011å07æ19æ 01:14, Randy Dunlap åé:
On Mon, 18 Jul 2011 19:09:50 +0200 Andi Kleen wrote:

On Mon, Jul 18, 2011 at 03:14:18PM +0300, Pekka Enberg wrote:
On Mon, Jul 18, 2011 at 2:18 PM, Amerigo Wang<amwang@xxxxxxxxxx> wrote:
On ppc, we got this build error with randconfig:

drivers/built-in.o:(.toc1+0xf90): undefined reference to `vmstat_text': 1 errors in 1 logs

This is due to that it enabled CONFIG_NUMA but not CONFIG_SYSFS.

And the user-space tool numactl depends on sysfs files too.
So, I think it is very reasonable to make CONFIG_NUMA depend on CONFIG_SYSFS.

Is it? CONFIG_NUMA is useful even without userspace numactl tool, no?

Yes it is. No direct dependency.

I would rather fix it in ppc.

This isn't a ppc-only error. It happens when CONFIG_PROC_FS is not enabled
(or is it CONFIG_SYSFS?).

I reported it for linux-next of 20110526:

when CONFIG_PROC_FS is not enabled:

drivers/built-in.o: In function `node_read_vmstat':
node.c:(.text+0x56ffa): undefined reference to `vmstat_text'

Right, I believe x86 has the same problem.
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