Re: [PATCH] mm: Switch NUMA_BUILD and COMPACTION_BUILD to newIS_ENABLED() syntax

From: Michal Hocko
Date: Mon Aug 15 2011 - 06:27:13 EST

On Wed 10-08-11 17:12:40, Michal Marek wrote:
> Introduced in 3.1-rc1, IS_ENABLED(CONFIG_NUMA) expands to a true value
> iff CONFIG_NUMA is set. This makes it easier to grep for code that
> depends on CONFIG_NUMA.

It looks this doesn't work properly. I can see the following build
CHK include/linux/version.h
CHK include/generated/utsrelease.h
UPD include/generated/utsrelease.h
CC arch/x86/kernel/asm-offsets.s
In file included from include/linux/kmod.h:22:0,
from include/linux/module.h:13,
from include/linux/crypto.h:21,
from arch/x86/kernel/asm-offsets.c:8:
include/linux/gfp.h: In function âgfp_zonelistâ:
include/linux/gfp.h:265:1: error: â__enabled_CONFIG_NUMAâ undeclared (first use in this function)
include/linux/gfp.h:265:1: note: each undeclared identifier is reported only once for each function it appears in
include/linux/gfp.h:265:1: error: â__enabled_CONFIG_NUMA_MODULEâ undeclared (first use in this function)
make[1]: *** [arch/x86/kernel/asm-offsets.s] Error 1

I do not have CONFIG_NUMA set so it seems to have issues with config
symbols which are not set to any value. Is this something that could be
Michal Hocko
Lihovarska 1060/12
190 00 Praha 9
Czech Republic
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