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From: Joe Perches <joe@perches.com>
To: Kari Argillander <kari.argillander@gmail.com>
Cc: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>,
	ntfs3@lists.linux.dev, Christoph Hellwig <hch@lst.de>,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2] fs/ntfs3: Use kcalloc/kmalloc_array over kzalloc/kmalloc
Date: Tue, 17 Aug 2021 16:12:08 -0700	[thread overview]
Message-ID: <ef1d002a0720ace0ed8dd79c2ac3c600@perches.com> (raw)
In-Reply-To: <20210817193815.307182-4-kari.argillander@gmail.com>

On 2021-08-17 12:38, Kari Argillander wrote:
> Use kcalloc/kmalloc_array over kzalloc/kmalloc when we allocate array.
> Checkpatch found these after we did not use our own defined allocation
> wrappers.
[]
> diff --git a/fs/ntfs3/file.c b/fs/ntfs3/file.c
[]
> @@ -900,7 +900,7 @@ static ssize_t ntfs_compress_write(struct kiocb
> *iocb, struct iov_iter *from)
>  		return -EOPNOTSUPP;
>  	}
> 
> -	pages = kmalloc(pages_per_frame * sizeof(struct page *), GFP_NOFS);
> +	pages = kcalloc(pages_per_frame, sizeof(struct page *), GFP_NOFS);

This is not an exact transformation.
This allocates zeroed memory.
Use kmalloc_array here instead.

  reply	other threads:[~2021-08-17 23:12 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-17 19:38 [PATCH v2] Use kernel alloc wrappers and fix wargings Kari Argillander
2021-08-17 19:38 ` [PATCH v2] fs/ntfs3: Fix one none utf8 char in source file Kari Argillander
2021-08-17 19:38 ` [PATCH v2] fs/ntfs3: Do not use driver own alloc wrappers Kari Argillander
2021-08-17 19:38 ` [PATCH v2] fs/ntfs3: Use kcalloc/kmalloc_array over kzalloc/kmalloc Kari Argillander
2021-08-17 23:12   ` Joe Perches [this message]
2021-08-17 23:43     ` Kari Argillander

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