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Tue, 18 Feb 2020 23:11:40 +0000 (UTC) Received: from hqpgpgate101.nvidia.com (Not Verified[216.228.121.13]) by hqnvemgate26.nvidia.com (using TLS: TLSv1.2, DES-CBC3-SHA) id ; Tue, 18 Feb 2020 15:11:25 -0800 Received: from hqmail.nvidia.com ([172.20.161.6]) by hqpgpgate101.nvidia.com (PGP Universal service); Tue, 18 Feb 2020 15:11:39 -0800 X-PGP-Universal: processed; by hqpgpgate101.nvidia.com on Tue, 18 Feb 2020 15:11:39 -0800 Received: from [10.110.48.28] (10.124.1.5) by HQMAIL107.nvidia.com (172.20.187.13) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Tue, 18 Feb 2020 23:11:38 +0000 Subject: Re: [PATCH v6 06/19] mm: rename readahead loop variable to 'i' To: Matthew Wilcox , CC: , , , , , , , , References: <20200217184613.19668-1-willy@infradead.org> <20200217184613.19668-10-willy@infradead.org> X-Nvconfidentiality: public From: John Hubbard Message-ID: <64b98d0d-d281-fe34-8dbb-a04ac719d74d@nvidia.com> Date: Tue, 18 Feb 2020 15:11:38 -0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.5.0 MIME-Version: 1.0 In-Reply-To: <20200217184613.19668-10-willy@infradead.org> X-Originating-IP: [10.124.1.5] X-ClientProxiedBy: HQMAIL105.nvidia.com (172.20.187.12) To HQMAIL107.nvidia.com (172.20.187.13) Content-Type: text/plain; charset="utf-8" Content-Language: en-US Content-Transfer-Encoding: 7bit DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1582067485; bh=Akrlss92FgzkovaQxMkVJdSsymeHgaqEmFb5c836i2c=; h=X-PGP-Universal:Subject:To:CC:References:X-Nvconfidentiality:From: Message-ID:Date:User-Agent:MIME-Version:In-Reply-To: X-Originating-IP:X-ClientProxiedBy:Content-Type:Content-Language: Content-Transfer-Encoding; b=asIzv0ojJMKF80DvWYkbSq9xGWJ7ZLdUAYVyRhXJBGnn4nPGzSL5rIS/ovTNr0scc gs7mPgZCbIGuN21UlJlaqg82EidFL/bBRrnN1h9FnqQChjvgbS/geskVhNeO2W1sV/ biiNK98/SqvU14elddMK8D4ixbdxkqTNwCfXZWhbo6lz6fqouGkCodOHr15m9WoBPg I43na5oYhdKOUUcTc0axj14qTc0xmCQmt8qsSWiZWW3MAxOJzAv21qXLCylvpn+L1Q UamfH/UvbmkELot1FHszYWOU7zMxTj/3Gq6drvkO89R/67fyfce8YR2j0Jl0ROIySV t1Mvpfops1WHQ== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On 2/17/20 10:45 AM, Matthew Wilcox wrote: > From: "Matthew Wilcox (Oracle)" > > Change the type of page_idx to unsigned long, and rename it -- it's > just a loop counter, not a page index. > > Suggested-by: John Hubbard > Signed-off-by: Matthew Wilcox (Oracle) > --- > mm/readahead.c | 6 +++--- > 1 file changed, 3 insertions(+), 3 deletions(-) > Looks good, Reviewed-by: John Hubbard thanks, -- John Hubbard NVIDIA > diff --git a/mm/readahead.c b/mm/readahead.c > index 74791b96013f..bdc5759000d3 100644 > --- a/mm/readahead.c > +++ b/mm/readahead.c > @@ -156,7 +156,7 @@ void __do_page_cache_readahead(struct address_space *mapping, > struct inode *inode = mapping->host; > unsigned long end_index; /* The last page we want to read */ > LIST_HEAD(page_pool); > - int page_idx; > + unsigned long i; > loff_t isize = i_size_read(inode); > gfp_t gfp_mask = readahead_gfp_mask(mapping); > struct readahead_control rac = { > @@ -174,7 +174,7 @@ void __do_page_cache_readahead(struct address_space *mapping, > /* > * Preallocate as many pages as we will need. > */ > - for (page_idx = 0; page_idx < nr_to_read; page_idx++) { > + for (i = 0; i < nr_to_read; i++) { > struct page *page; > > if (offset > end_index) > @@ -198,7 +198,7 @@ void __do_page_cache_readahead(struct address_space *mapping, > break; > page->index = offset; > list_add(&page->lru, &page_pool); > - if (page_idx == nr_to_read - lookahead_size) > + if (i == nr_to_read - lookahead_size) > SetPageReadahead(page); > rac._nr_pages++; > offset++; >