Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755352AbYJWLia (ORCPT ); Thu, 23 Oct 2008 07:38:30 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752481AbYJWLiW (ORCPT ); Thu, 23 Oct 2008 07:38:22 -0400 Received: from nf-out-0910.google.com ([64.233.182.189]:62362 "EHLO nf-out-0910.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752204AbYJWLiV (ORCPT ); Thu, 23 Oct 2008 07:38:21 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=date:from:to:subject:message-id:mime-version:content-type :content-disposition:user-agent; b=dXJ7gjRxF7ySBhPzdcx3d8VbHUFQfLz4zXy1KviPN98Uozk6MUWIJabu5jpEaOJgZ4 KpLHEFFFIkvb2EMromqKNR/EOd7k7sCb658YfB12faep88eTWWn01qp/UTZ5QT6mKSst yaNU6r8VqeDbNmzsyN4ykRviSWXgsV0b01/Ks= Date: Thu, 23 Oct 2008 15:41:33 +0400 From: Alexey Dobriyan To: linux-kernel@vger.kernel.org Subject: How do I printk correctly? Message-ID: <20081023114133.GA30187@x200.localdomain> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 988 Lines: 32 If variable is of Type use printk format specifier. --------------------------------------------------------- int %d or %x unsigned int %u or %x long %ld ot %lx unsigned long %lu or %lx long long %lld or %llx unsigned long long %llu or %llx size_t %zu or %zx ssize_t %zd or %zx Raw pointer value SHOULD be printed with %p. u64 SHOULD be printed with %llu/%llx, (unsigned long long): printk("%llu", (unsigned long long)u64_var); s64 SHOULD be printed with %lld/%llx, (long long): printk("%lld", (long long)s64_var); If type is dependent on config option (sector_t), use format specifier of biggest type and explicitly cast to it. Reminder: sizeof() result is of type size_t. Thank you for your cooperation. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/