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From:   Julia Lawall <Julia.Lawall@inria.fr>
To:     Johannes Berg <johannes.berg@intel.com>
Cc:     kernel-janitors@vger.kernel.org,
        Emmanuel Grumbach <emmanuel.grumbach@intel.com>,
        Luca Coelho <luciano.coelho@intel.com>,
        Intel Linux Wireless <linuxwifi@intel.com>,
        Kalle Valo <kvalo@codeaurora.org>,
        "David S. Miller" <davem@davemloft.net>,
        Jakub Kicinski <kuba@kernel.org>,
        linux-wireless@vger.kernel.org, netdev@vger.kernel.org,
        linux-kernel@vger.kernel.org
Subject: [PATCH 10/14] iwlwifi: dbg_ini: drop double zeroing
Date:   Sun, 20 Sep 2020 13:26:22 +0200
Message-Id: <1600601186-7420-11-git-send-email-Julia.Lawall@inria.fr>
In-Reply-To: <1600601186-7420-1-git-send-email-Julia.Lawall@inria.fr>
References: <1600601186-7420-1-git-send-email-Julia.Lawall@inria.fr>
Precedence: bulk

sg_init_table zeroes its first argument, so the allocation of that argument
doesn't have to.

the semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
expression x,n,flags;
@@

x = 
- kcalloc
+ kmalloc_array
  (n,sizeof(*x),flags)
...
sg_init_table(x,n)
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr>

---
 drivers/net/wireless/intel/iwlwifi/fw/dbg.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff -u -p a/drivers/net/wireless/intel/iwlwifi/fw/dbg.c b/drivers/net/wireless/intel/iwlwifi/fw/dbg.c
--- a/drivers/net/wireless/intel/iwlwifi/fw/dbg.c
+++ b/drivers/net/wireless/intel/iwlwifi/fw/dbg.c
@@ -631,7 +631,7 @@ static struct scatterlist *alloc_sgtable
 	struct scatterlist *table;
 
 	nents = DIV_ROUND_UP(size, PAGE_SIZE);
-	table = kcalloc(nents, sizeof(*table), GFP_KERNEL);
+	table = kmalloc_array(nents, sizeof(*table), GFP_KERNEL);
 	if (!table)
 		return NULL;
 	sg_init_table(table, nents);