linux-kernel - Re: [0/2] powerpc/powernv/vas: Adjustments for two function implementations

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Date: Tue, 16 Apr 2024 12:18:49 +0000
From: Christophe Leroy <christophe.leroy@...roup.eu>
To: Markus Elfring <Markus.Elfring@....de>, Michael Ellerman
	<mpe@...erman.id.au>, "linuxppc-dev@...ts.ozlabs.org"
	<linuxppc-dev@...ts.ozlabs.org>, "kernel-janitors@...r.kernel.org"
	<kernel-janitors@...r.kernel.org>, Aneesh Kumar K.V
	<aneesh.kumar@...nel.org>, "Naveen N. Rao" <naveen.n.rao@...ux.ibm.com>,
	Nicholas Piggin <npiggin@...il.com>
CC: LKML <linux-kernel@...r.kernel.org>, "cocci@...ia.fr" <cocci@...ia.fr>
Subject: Re: [0/2] powerpc/powernv/vas: Adjustments for two function
 implementations



Le 16/04/2024 à 14:14, Markus Elfring a écrit :
>> This is explicit in Kernel documentation:
>>
>> /**
>>    * kfree - free previously allocated memory
>>    * @object: pointer returned by kmalloc() or kmem_cache_alloc()
>>    *
>>    * If @object is NULL, no operation is performed.
>>    */
>>
>> That's exactly the same behaviour as free() in libc.
>>
>> So Coccinelle should be fixed if it reports an error for that.
> 
> Redundant function calls can occasionally be avoided accordingly,
> can't they?

Sure they can, but is that worth it here ?

Christophe