linux-kernel - Re: linux-next: build failure after merge of the slab tree

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Date:   Thu, 24 Nov 2022 09:56:26 +0100
From:   Vlastimil Babka <vbabka@...e.cz>
To:     Stephen Rothwell <sfr@...b.auug.org.au>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>
Subject: Re: linux-next: build failure after merge of the slab tree

On 11/24/22 05:39, Stephen Rothwell wrote:
> Hi all,
> 
> After merging the slab tree, today's linux-next build (powerpc
> ppc64_defconfig) failed like this:

Oops, thanks, looks like I had !CONFIG_PRINTK when testing that... Will be
fixed in the next slab-next.

> mm/slab_common.c: In function 'kmem_dump_obj':
> mm/slab_common.c:603:49: error: 'struct kmem_cache' has no member named 'usersize'
>   603 |         if (kp.kp_slab_cache && kp.kp_slab_cache->usersize)
>       |                                                 ^~
> In file included from include/asm-generic/bug.h:22,
>                  from arch/powerpc/include/asm/bug.h:159,
>                  from include/linux/bug.h:5,
>                  from include/linux/thread_info.h:13,
>                  from include/asm-generic/preempt.h:5,
>                  from ./arch/powerpc/include/generated/asm/preempt.h:1,
>                  from include/linux/preempt.h:78,
>                  from include/linux/spinlock.h:56,
>                  from include/linux/mmzone.h:8,
>                  from include/linux/gfp.h:7,
>                  from include/linux/slab.h:15,
>                  from mm/slab_common.c:7:
> mm/slab_common.c:604:53: error: 'struct kmem_cache' has no member named 'usersize'
>   604 |                 pr_cont(" size %u", kp.kp_slab_cache->usersize);
>       |                                                     ^~
> include/linux/printk.h:429:33: note: in definition of macro 'printk_index_wrap'
>   429 |                 _p_func(_fmt, ##__VA_ARGS__);                           \
>       |                                 ^~~~~~~~~~~
> include/linux/printk.h:542:9: note: in expansion of macro 'printk'
>   542 |         printk(KERN_CONT fmt, ##__VA_ARGS__)
>       |         ^~~~~~
> mm/slab_common.c:604:17: note: in expansion of macro 'pr_cont'
>   604 |                 pr_cont(" size %u", kp.kp_slab_cache->usersize);
>       |                 ^~~~~~~
> 
> Caused by commit
> 
>   3cdb7b6ad16a ("mm, slab: ignore hardened usercopy parameters when disabled")
> 
> I have used the slab tree from next-20221123 for today.
>