From mboxrd@z Thu Jan 1 00:00:00 1970 From: Arend van Spriel Subject: Re: linux-next: build failure after merge of the wireless-next tree Date: Thu, 6 Mar 2014 09:53:58 +0100 Message-ID: <531837A6.8090406@broadcom.com> References: <20140306134332.0c3f12ec6849d1b2ccefda6e@canb.auug.org.au> Mime-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20140306134332.0c3f12ec6849d1b2ccefda6e@canb.auug.org.au> Sender: linux-kernel-owner@vger.kernel.org To: Stephen Rothwell , "John W. Linville" Cc: linux-next@vger.kernel.org, linux-kernel@vger.kernel.org, Hante Meuleman List-Id: linux-next.vger.kernel.org On 03/06/2014 03:43 AM, Stephen Rothwell wrote: > Hi John, > > After merging the wireless-next tree, today's linux-next build > (arm multi_v7_defconfig) failed like this: > > drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c: In function > 'brcmf_sdio_intr_rstatus': > drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c:2464:3: error: > implicit declaration of function 'atomic_set_mask' > [-Werror=implicit-function-declaration] > > Caused by commit c98db0bec72a ("brcmfmac: Use atomic functions for > intstatus update"). Arm does not seem to provide > atomic_set_mask()? > > I reverted that commit for today. That is fine. The kbuild robot also found issue with this function on other archs. I must say I am surprised as this code fragment in asm-generic/atomic.h suggests it is needed for SMP to work (?): 20 #ifdef CONFIG_SMP 21 /* Force people to define core atomics */ 22 # if !defined(atomic_add_return) || !defined(atomic_sub_return) || \ 23 !defined(atomic_clear_mask) || !defined(atomic_set_mask) 24 # error "SMP requires a little arch-specific magic" 25 # endif 26 #endif Maybe this requirement is no longer valid. Anyway. I will sent revert patch and replacement to John. Thanks, Arend