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

From: Randy Dunlap <[email-masked]>
Date: Sun, 31 Aug 2014 07:48:37 -0700

On 08/31/14 04:36, Andrey Ryabinin wrote:
> 2014-08-30 5:48 GMT+04:00 Randy Dunlap <[email-masked]>:
>> From: Randy Dunlap <[email-masked]>
>>
>> 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 <[email-masked]>
>> ---
>>  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