From: Michal Marek <mmarek@suse.cz>
To: Michal Hocko <mhocko@suse.cz>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] mm: Switch NUMA_BUILD and COMPACTION_BUILD to new IS_ENABLED() syntax
Date: Mon, 15 Aug 2011 12:33:23 +0200 [thread overview]
Message-ID: <4E48F5F3.2020509@suse.cz> (raw)
In-Reply-To: <20110815102707.GA3967@tiehlicka.suse.cz>
On 15.8.2011 12:27, Michal Hocko wrote:
> 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
> error:
> 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 a??gfp_zonelista??:
> include/linux/gfp.h:265:1: error: a??__enabled_CONFIG_NUMAa?? 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: a??__enabled_CONFIG_NUMA_MODULEa?? 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
> fixed?
It works if CONFIG_NUMA is not set, but it doesn't work if CONFIG_NUMA
is not visible (if its dependencies are not met). The fix would be to
generate the __enabled_* defines for all symbols, not only for the
visible ones. I'll repost the patch once this is fixed.
Michal
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prev parent reply other threads:[~2011-08-15 10:33 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-08-10 15:12 Michal Marek
2011-08-11 12:51 ` Michal Hocko
2011-08-11 13:01 ` Michal Hocko
2011-08-11 13:12 ` Michal Marek
2011-08-11 13:18 ` Michal Hocko
2011-08-15 10:27 ` Michal Hocko
2011-08-15 10:33 ` Michal Marek [this message]
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