Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754731AbbK0OOJ (ORCPT ); Fri, 27 Nov 2015 09:14:09 -0500 Received: from mx2.suse.de ([195.135.220.15]:33016 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754284AbbK0OOH (ORCPT ); Fri, 27 Nov 2015 09:14:07 -0500 Date: Fri, 27 Nov 2015 15:14:06 +0100 From: Michal Marek To: Arnd Bergmann Cc: linux-kbuild@vger.kernel.org, =?iso-8859-1?Q?J=F6rn?= Engel , Prasad Joshi , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH] logfs: clarify MTD dependency Message-ID: <20151127141406.GA29886@sepie.suse.cz> References: <9365895.IkncCfXjo6@wuerfel> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <9365895.IkncCfXjo6@wuerfel> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3141 Lines: 86 On Fri, Nov 27, 2015 at 02:54:53PM +0100, Arnd Bergmann wrote: > After a change to the way that composite modules work, we get > a logfs build error: > > fs/built-in.o: In function `logfs_mount': > :(.text+0x139d34): undefined reference to `logfs_get_sb_mtd' > fs/built-in.o: In function `logfs_get_sb_bdev': > :(.text+0x13aa08): undefined reference to `logfs_get_sb_mtd' > > This patch avoids the error by changing the dependencies of > logfs in a way that we can no longer configure logfs as built-in > when the MTD core is a loadable module, while leaving the > dependency to require at least one of MTD or BLOCK to be > enabled. Hi Arnd, I hit this as well and was about to submit a slightly different fix. Can you try the logfs portion of the below patch? Proper changelog is to be done, but the gist of the patch is that IS_REACHABLE(CONFIG_FOO) evaluates to 1 if CONFIG_FOO=y or we are building a module and CONFIG_FOO=m. Michal >From 63e7ab41e3958e753277728acbe15faf35a5374e Mon Sep 17 00:00:00 2001 From: Michal Marek Date: Fri, 27 Nov 2015 15:08:29 +0100 Subject: [PATCH] kbuild: Use IS_REACHABLE to handle objname-m composite objects Fixes: cf4f21938e13 ("kbuild: Allow to specify composite modules with modname-m") Signed-off-by: Michal Marek --- drivers/misc/ibmasm/ibmasm.h | 2 +- drivers/usb/chipidea/otg_fsm.h | 2 +- fs/logfs/logfs.h | 2 +- 3 files changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/misc/ibmasm/ibmasm.h b/drivers/misc/ibmasm/ibmasm.h index 5bd127727d8e..0f4c43a8543e 100644 --- a/drivers/misc/ibmasm/ibmasm.h +++ b/drivers/misc/ibmasm/ibmasm.h @@ -211,7 +211,7 @@ void ibmasmfs_unregister(void); void ibmasmfs_add_sp(struct service_processor *sp); /* uart */ -#if IS_ENABLED(CONFIG_SERIAL_8250) +#if IS_REACHABLE(CONFIG_SERIAL_8250) void ibmasm_register_uart(struct service_processor *sp); void ibmasm_unregister_uart(struct service_processor *sp); #else diff --git a/drivers/usb/chipidea/otg_fsm.h b/drivers/usb/chipidea/otg_fsm.h index 262d6ef8df7c..44506e4aa11f 100644 --- a/drivers/usb/chipidea/otg_fsm.h +++ b/drivers/usb/chipidea/otg_fsm.h @@ -62,7 +62,7 @@ /* SSEND time before SRP */ #define TB_SSEND_SRP (1500) /* minimum 1.5 sec, section:5.1.2 */ -#if IS_ENABLED(CONFIG_USB_OTG_FSM) +#if IS_REACHABLE(CONFIG_USB_OTG_FSM) int ci_hdrc_otg_fsm_init(struct ci_hdrc *ci); int ci_otg_fsm_work(struct ci_hdrc *ci); diff --git a/fs/logfs/logfs.h b/fs/logfs/logfs.h index 23f961a8fb92..2fcd487a4ab2 100644 --- a/fs/logfs/logfs.h +++ b/fs/logfs/logfs.h @@ -485,7 +485,7 @@ static inline int logfs_get_sb_bdev(struct logfs_super *s, #endif /* dev_mtd.c */ -#if IS_ENABLED(CONFIG_MTD) +#if IS_REACHABLE(CONFIG_MTD) int logfs_get_sb_mtd(struct logfs_super *s, int mtdnr); #else static inline int logfs_get_sb_mtd(struct logfs_super *s, int mtdnr) -- 2.1.4 -- 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/