From patchwork Fri Dec 13 14:36:10 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Brian Foster X-Patchwork-Id: 13907263 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4F12E1E22E8 for ; Fri, 13 Dec 2024 14:34:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734100473; cv=none; b=Y/37Xv5cWI61PAZM3UCz+qYBZHODRKgOhabCUdumriUlJD620nVKfg5WnLmfO++xaY3HyeorvgNkPUev3J5K8dtBlz+FjBqCjThkSLQq5PfdQYUdkQK7+Fi6JYCe6lD2priL0F1oxTXnmtOjFmHlLLxqb9GbOdYlNArOXmQHMs4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734100473; c=relaxed/simple; bh=peow5fQTuWi8AJxKriqerb0wfKWZpsGa0STw8wGnGNk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=nJxoURxGaW97CZYJTGwF5aV1NsenfujXE7CfDaMVzj9EecZMLCp1X+Lo+ggorlnoM/aDZTX0ljoSSml3lLltU0tFptPQc9M0aY3i9s4SJd5OYG895h0xbTSlPPzwyes78p7sPp71r8an5ukZnxTQXtwj209hZMRcJd1siYyOF5w= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=FwYRSq5r; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="FwYRSq5r" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1734100471; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=o2VEA2dRQqqSc04MHk0RHgROz3bcefB7YZh9xI6D7Dc=; b=FwYRSq5rNVjM/bUwYlJEd4aQzlECBvVk84NKD1/J4KqFe71Dgvl2SfVU6hwadN6A3GPDPb e6CsR0CPPr+5rhXsFWG8uuOXQYKa8PLMZDNMTvMwUWX/1zpl1XERB0AWesJtbSewmDcY8I wOUSFWuSG/kKgvlDbTC/sXiSwLDVSf8= Received: from mx-prod-mc-01.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-257-6o--Zv1yN12de_I3ZUKIgQ-1; Fri, 13 Dec 2024 09:34:29 -0500 X-MC-Unique: 6o--Zv1yN12de_I3ZUKIgQ-1 X-Mimecast-MFC-AGG-ID: 6o--Zv1yN12de_I3ZUKIgQ Received: from mx-prod-int-04.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-04.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.40]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id AC13B1955BF4; Fri, 13 Dec 2024 14:34:28 +0000 (UTC) Received: from bfoster.redhat.com (unknown [10.22.90.12]) by mx-prod-int-04.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 127F91955F3C; Fri, 13 Dec 2024 14:34:27 +0000 (UTC) From: Brian Foster To: linux-fsdevel@vger.kernel.org Cc: linux-xfs@vger.kernel.org Subject: [PATCH 6/6] iomap: advance the iter directly on zero range Date: Fri, 13 Dec 2024 09:36:10 -0500 Message-ID: <20241213143610.1002526-7-bfoster@redhat.com> In-Reply-To: <20241213143610.1002526-1-bfoster@redhat.com> References: <20241213143610.1002526-1-bfoster@redhat.com> Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.0 on 10.30.177.40 Modify zero range to advance the iter directly. Replace the local pos and length calculations with direct advances and loop based on iter state instead. Signed-off-by: Brian Foster --- fs/iomap/buffered-io.c | 15 +++++---------- 1 file changed, 5 insertions(+), 10 deletions(-) diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c index 5e33e52eff15..e0ae46b11413 100644 --- a/fs/iomap/buffered-io.c +++ b/fs/iomap/buffered-io.c @@ -1343,15 +1343,12 @@ static inline int iomap_zero_iter_flush_and_stale(struct iomap_iter *i) static loff_t iomap_zero_iter(struct iomap_iter *iter, bool *did_zero) { - loff_t pos = iter->pos; - loff_t length = iomap_length(iter); - loff_t written = 0; - do { struct folio *folio; int status; size_t offset; - size_t bytes = min_t(u64, SIZE_MAX, length); + size_t bytes = min_t(u64, SIZE_MAX, iomap_length(iter)); + loff_t pos = iter->pos; bool ret; status = iomap_write_begin(iter, pos, bytes, &folio); @@ -1374,14 +1371,12 @@ static loff_t iomap_zero_iter(struct iomap_iter *iter, bool *did_zero) if (WARN_ON_ONCE(!ret)) return -EIO; - pos += bytes; - length -= bytes; - written += bytes; - } while (length > 0); + iomap_iter_advance(iter, bytes); + } while (iomap_length(iter) > 0); if (did_zero) *did_zero = true; - return written; + return 0; } int