linux-kernel - Re: + mm-slab_common-move-kmem_cache-definition-to-internal-header-fix-2.patch added to -mm tree

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Date:	Thu, 04 Sep 2014 20:46:55 -0700
From:	Randy Dunlap <rdunlap@...radead.org>
To:	Joonsoo Kim <iamjoonsoo.kim@....com>, linux-kernel@...r.kernel.org
CC:	mm-commits@...r.kernel.org
Subject: Re: + mm-slab_common-move-kmem_cache-definition-to-internal-header-fix-2.patch
 added to -mm tree

On 09/04/14 17:44, Joonsoo Kim wrote:
> On Wed, Sep 03, 2014 at 12:40:52PM -0700, akpm@...ux-foundation.org wrote:
>>
>> The patch titled
>>      Subject: mm: fix kmemcheck.c build errors
>> has been added to the -mm tree.  Its filename is
>>      mm-slab_common-move-kmem_cache-definition-to-internal-header-fix-2.patch
>>
>> This patch should soon appear at
>>     http://ozlabs.org/~akpm/mmots/broken-out/mm-slab_common-move-kmem_cache-definition-to-internal-header-fix-2.patch
>> and later at
>>     http://ozlabs.org/~akpm/mmotm/broken-out/mm-slab_common-move-kmem_cache-definition-to-internal-header-fix-2.patch
>>
>> Before you just go and hit "reply", please:
>>    a) Consider who else should be cc'ed
>>    b) Prefer to cc a suitable mailing list as well
>>    c) Ideally: find the original patch on the mailing list and do a
>>       reply-to-all to that, adding suitable additional cc's
>>
>> *** Remember to use Documentation/SubmitChecklist when testing your code ***
>>
>> The -mm tree is included into linux-next and is updated
>> there every 3-4 working days
>>
>> ------------------------------------------------------
>> From: Randy Dunlap <rdunlap@...radead.org>
>> Subject: mm: fix kmemcheck.c build errors
>>
>> Add header files 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
>>
>> ../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]
>>
>> Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
>> Cc: Joonsoo Kim <iamjoonsoo.kim@....com>
>> Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
>> ---
>>
>>  mm/kmemcheck.c |    1 +
>>  mm/slab.h      |    2 ++
>>  2 files changed, 3 insertions(+)
>>
>> diff -puN mm/kmemcheck.c~mm-slab_common-move-kmem_cache-definition-to-internal-header-fix-2 mm/kmemcheck.c
>> --- a/mm/kmemcheck.c~mm-slab_common-move-kmem_cache-definition-to-internal-header-fix-2
>> +++ a/mm/kmemcheck.c
>> @@ -2,6 +2,7 @@
>>  #include <linux/mm_types.h>
>>  #include <linux/mm.h>
>>  #include <linux/slab.h>
>> +#include "slab.h"
>>  #include <linux/kmemcheck.h>
>>  
>>  void kmemcheck_alloc_shadow(struct page *page, int order, gfp_t flags, int node)
>> diff -puN mm/slab.h~mm-slab_common-move-kmem_cache-definition-to-internal-header-fix-2 mm/slab.h
>> --- a/mm/slab.h~mm-slab_common-move-kmem_cache-definition-to-internal-header-fix-2
>> +++ a/mm/slab.h
>> @@ -268,6 +268,8 @@ static inline void memcg_uncharge_slab(s
>>  }
>>  #endif
>>  
>> +#include <linux/memcontrol.h>
>> +
>>  static inline struct kmem_cache *cache_from_obj(struct kmem_cache *s, void *x)
>>  {
>>  	struct kmem_cache *cachep;
> 
> Hello, Andrew.
> 
> Could you take another fix instead of this?
> This also make build failure if CONFIG_MEMCG_KMEM=y.
> Please see following patch I sent.
> 
> https://lkml.org/lkml/2014/8/31/148
> 
> The only difference is position of memcontrol.h header.
> 
> Thanks.

Ack that.  Thanks.

-- 
~Randy
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