From mboxrd@z Thu Jan 1 00:00:00 1970 From: Matthew Wilcox Subject: [PATCH v10 53/62] dax: dax_insert_mapping_entry always succeeds Date: Thu, 29 Mar 2018 20:42:36 -0700 Message-ID: <20180330034245.10462-54-willy@infradead.org> References: <20180330034245.10462-1-willy@infradead.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sourceforge.net; s=x; h=References:In-Reply-To:Message-Id:Date:Subject:Cc: To:From:Sender:Reply-To:MIME-Version:Content-Type:Content-Transfer-Encoding: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=2RxoRv1Fhn0WQ8po9Y9ZZ/QqeY3lj+T+WBBCzPUIJDI=; b=IWTWcH227fGAlZhxY46FEScDBs 6amYoc0ld3fYsuEafW6+BEByS/e5CaLfuIYgh5fbIPCnIh78iL9uKizIxTnDanTB007zfuMQ/75Rl QK9LeHQe8wVBvW9e4TAt5Y6cBSKmpB+lxlW9U/79WfwcG3KacR93sKJi3ogibx/3oh3Q=; DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sf.net; s=x ; h=References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To :MIME-Version:Content-Type:Content-Transfer-Encoding:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=2RxoRv1Fhn0WQ8po9Y9ZZ/QqeY3lj+T+WBBCzPUIJDI=; b=m+LYAZP9ryOKjXHMHDYP+wCJ9T 5NFem1pEMCO6WnuQziyQ9A9sHWu9+6gYOfe9w0x7AJ7M7DYv5WjFSKbVBBnoCWUsJiCJKp+GP6kLK J/lTVk671Zv3xiRalK5sovdpqZNrIn5l9A2O0ssSQ+M6SxPqlvRqcXokZGERNRh3Ep1U=; DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=References:In-Reply-To:Message-Id: Date:Subject:Cc:To:From:Sender:Reply-To:MIME-Version:Content-Type: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=2RxoRv1Fhn0WQ8po9Y9ZZ/QqeY3lj+T+WBBCzPUIJDI=; b=Tn9l2i3f5Y1tUGy6dKeC5ye93 RI1Xlc05hhfpMBQDFkt9J3AtJQtArupXh9JMJCNpHnXZq0WMDSriYdEzLwCDUOTPabxgHQmCAAzq+ 2QIUI2Jcdyf+DuGRz8EDG3XSW1wdebSpmBZuOfOyHj+I4cmLXBnnoOE5rxOq2i7ZKXUnX/gzf4r2d OGI14iL/CTlCaVloTKhMabNWeGzGFQ6iZAWtRp/uU8DLHJ2VNmPLr6JwlWDcfO4ayAmbZlJ6AY0jp /siX1FAFyXh19QXm0GOzjdDbdifTDOPHCU35P2+GyoRJU+/FC4qymGSM6wn9omH9uCtj9SlQWgNqz CMZOmyj8Q==; In-Reply-To: <20180330034245.10462-1-willy@infradead.org> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.net To: linux-mm@kvack.org, linux-fsdevel@vger.kernel.org Cc: linux-nilfs@vger.kernel.org, Jan Kara , Jeff Layton , Matthew Wilcox , James Simmons , Jaegeuk Kim , Andreas Dilger , Nicholas Piggin , linux-f2fs-devel@lists.sourceforge.net, Oleg Drokin , Ryusuke Konishi , Lukas Czerner , Ross Zwisler , Christoph Hellwig , Goldwyn Rodrigues , Mike Kravetz From: Matthew Wilcox It does not return an error, so we don't need to check the return value for IS_ERR(). Signed-off-by: Matthew Wilcox --- fs/dax.c | 16 +--------------- 1 file changed, 1 insertion(+), 15 deletions(-) diff --git a/fs/dax.c b/fs/dax.c index 371d50a1c14e..3bd9f624c1f8 100644 --- a/fs/dax.c +++ b/fs/dax.c @@ -994,18 +994,12 @@ static int dax_load_hole(struct address_space *mapping, void *entry, struct inode *inode = mapping->host; unsigned long vaddr = vmf->address; int ret = VM_FAULT_NOPAGE; - void *entry2; pfn_t pfn = pfn_to_pfn_t(my_zero_pfn(vaddr)); - entry2 = dax_insert_mapping_entry(mapping, vmf, entry, pfn, + dax_insert_mapping_entry(mapping, vmf, entry, pfn, DAX_ZERO_PAGE, false); - if (IS_ERR(entry2)) { - ret = VM_FAULT_SIGBUS; - goto out; - } vm_insert_mixed(vmf->vma, vaddr, pfn); -out: trace_dax_load_hole(inode, vmf, ret); return ret; } @@ -1315,10 +1309,6 @@ static int dax_iomap_pte_fault(struct vm_fault *vmf, pfn_t *pfnp, entry = dax_insert_mapping_entry(mapping, vmf, entry, pfn, 0, write && !sync); - if (IS_ERR(entry)) { - error = PTR_ERR(entry); - goto error_finish_iomap; - } /* * If we are doing synchronous page fault and inode needs fsync, @@ -1402,8 +1392,6 @@ static int dax_pmd_load_hole(struct vm_fault *vmf, struct iomap *iomap, pfn = page_to_pfn_t(zero_page); ret = dax_insert_mapping_entry(mapping, vmf, entry, pfn, DAX_PMD | DAX_ZERO_PAGE, false); - if (IS_ERR(ret)) - goto fallback; ptl = pmd_lock(vmf->vma->vm_mm, vmf->pmd); if (!pmd_none(*(vmf->pmd))) { @@ -1525,8 +1513,6 @@ static int dax_iomap_pmd_fault(struct vm_fault *vmf, pfn_t *pfnp, entry = dax_insert_mapping_entry(mapping, vmf, entry, pfn, DAX_PMD, write && !sync); - if (IS_ERR(entry)) - goto finish_iomap; /* * If we are doing synchronous page fault and inode needs fsync, -- 2.16.2 ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot