linux-kernel - Re: [PATCH TRIVIAL] mm: Fix build warning in kmem_cache

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Date:	Mon, 16 Jul 2012 02:58:18 -0700 (PDT)
From:	David Rientjes <rientjes@...gle.com>
To:	Shuah Khan <shuah.khan@...com>
cc:	Pekka Enberg <penberg@...nel.org>, cl@...ux.com,
	glommer@...allels.com, js1304@...il.com, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, shuahkhan@...il.com
Subject: Re: [PATCH TRIVIAL] mm: Fix build warning in kmem_cache_create()

On Sun, 15 Jul 2012, Shuah Khan wrote:

> I can work on reshuffling the code. Do have a question though. This
> following sanity check is currently done only when CONFIG_DEBUG_VM is
> defined. However, it does appear to be something that is that should be
> checked even in regular path.
> 
> struct kmem_cache *kmem_cache_create(const char *name, size_t size,
> size_t align,
>                 unsigned long flags, void (*ctor)(void *))
> {
>         struct kmem_cache *s = NULL;
> 
> #ifdef CONFIG_DEBUG_VM
>         if (!name || in_interrupt() || size < sizeof(void *) ||
>                 size > KMALLOC_MAX_SIZE) {
>                 printk(KERN_ERR "kmem_cache_create(%s) integrity check"
>                         " failed\n", name);
>                 goto out;
>         }
> #endif
> 

Agreed, this shouldn't depend on CONFIG_DEBUG_VM.
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