linux-kernel - Re: [PATCH -mmotm] mm: fix kmemcheck.c build errors

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Message-ID: <540335C5.3030905@infradead.org>
Date:	Sun, 31 Aug 2014 07:48:37 -0700
From:	Randy Dunlap <rdunlap@...radead.org>
To:	Andrey Ryabinin <ryabinin.a.a@...il.com>,
	Joonsoo Kim <iamjoonsoo.kim@....com>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	Christoph Lameter <cl@...ux.com>,
	LKML <linux-kernel@...r.kernel.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	linux-next@...r.kernel.org, sfr@...b.auug.org.au, mhocko@...e.cz,
	Pekka Enberg <penberg@...nel.org>,
	Vegard Nossum <vegardno@....uio.no>
Subject: Re: [PATCH -mmotm] mm: fix kmemcheck.c build errors

On 08/31/14 04:36, Andrey Ryabinin wrote:
> 2014-08-30 5:48 GMT+04:00 Randy Dunlap <rdunlap@...radead.org>:
>> From: Randy Dunlap <rdunlap@...radead.org>
>>
>> Add header file to fix kmemcheck.c build errors:
>>
>> ../mm/kmemcheck.c:70:7: error: dereferencing pointer to incomplete type
>> ../mm/kmemcheck.c:83:15: error: dereferencing pointer to incomplete type
>> ../mm/kmemcheck.c:95:8: error: dereferencing pointer to incomplete type
>> ../mm/kmemcheck.c:95:21: error: dereferencing pointer to incomplete type
>>
>> Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
>> ---
>>  mm/kmemcheck.c |    1 +
>>  1 file changed, 1 insertion(+)
>>
>> Index: mmotm-2014-0829-1515/mm/kmemcheck.c
>> ===================================================================
>> --- mmotm-2014-0829-1515.orig/mm/kmemcheck.c
>> +++ mmotm-2014-0829-1515/mm/kmemcheck.c
>> @@ -2,6 +2,7 @@
>>  #include <linux/mm_types.h>
>>  #include <linux/mm.h>
>>  #include <linux/slab.h>
>> +#include <linux/slab_def.h>
> 
> This will work only for CONFIG_SLAB=y. struct kmem_cache definition
> was moved to internal header [*],
> so you need to include it here:
> #include "slab.h"
> 
> [*] http://ozlabs.org/~akpm/mmotm/broken-out/mm-slab_common-move-kmem_cache-definition-to-internal-header.patch

Thanks.  That makes sense.  [testing]  mm/kmemcheck.c still has a build error:

In file included from ../mm/kmemcheck.c:5:0:
../mm/slab.h: In function 'cache_from_obj':
../mm/slab.h:283:2: error: implicit declaration of function 'memcg_kmem_enabled' [-Werror=implicit-function-declaration]


Maybe Andrew should just drop that patch and its associated patches.


>>  #include <linux/kmemcheck.h>
>>
>>  void kmemcheck_alloc_shadow(struct page *page, int order, gfp_t flags, int node)
>>
> 
> 


-- 
~Randy
--
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