linux-kernel - [REPORT] Possible unnecessary usages of GFP

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Date:   Mon, 23 Jul 2018 10:39:40 +0800
From:   Jia-Ju Bai <baijiaju1990@...il.com>
To:     herbert@...dor.apana.org.au
Cc:     linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [REPORT] Possible unnecessary usages of GFP_ATOMIC in
 crypto/ablkcipher.c

My tool DCNS reports three unnecessary usages of GFP_ATOMIC in 
crypto/ablkcipher.c:
crypto/ablkcipher.c, 162: kmalloc(GFP_ATOMIC) in ablkcipher_next_slow
crypto/ablkcipher.c, 199: kmalloc(GFP_ATOMIC) in ablkcipher_copy_iv
crypto/ablkcipher.c, 315: kmalloc(GFP_ATOMIC) in setkey_unaligned

I meant to manually check the code, but I find that there are many 
functions calling ablkcipher_next_slow(),
ablkcipher_copy_iv() and setkey_unaligned(), so I am not sure whether 
the above three reports are true.

Could someone help me to validate these reports?
Thanks a lot in advance :)

Best wishes,
Jia-Ju Bai