From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoph Hellwig Date: Wed, 26 Feb 2020 09:07:28 -0800 Subject: [Cluster-devel] [PATCH v8 25/25] iomap: Convert from readpages to readahead In-Reply-To: <20200226170425.GD8045@magnolia> References: <20200225214838.30017-1-willy@infradead.org> <20200225214838.30017-26-willy@infradead.org> <20200226170425.GD8045@magnolia> Message-ID: <20200226170728.GD22837@infradead.org> List-Id: To: cluster-devel.redhat.com MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit On Wed, Feb 26, 2020 at 09:04:25AM -0800, Darrick J. Wong wrote: > > @@ -456,15 +435,8 @@ iomap_readpages(struct address_space *mapping, struct list_head *pages, > > unlock_page(ctx.cur_page); > > put_page(ctx.cur_page); > > } > > - > > - /* > > - * Check that we didn't lose a page due to the arcance calling > > - * conventions.. > > - */ > > - WARN_ON_ONCE(!ret && !list_empty(ctx.pages)); > > - return ret; > > After all the discussion about "if we still have ctx.cur_page we should > just stop" in v7, I'm surprised that this patch now doesn't say much of > anything, not even a WARN_ON()? The code quoted above puts the cur_page reference. By dropping the odd refactoring patch there is no need to check for cur_page being left as a special condition as that still is the normal loop exit state and properly handled, just as in the original iomap code.