From mboxrd@z Thu Jan 1 00:00:00 1970 From: Randy Dunlap Subject: Re: mmc core broken dependency on CONFIG_BLOCK (Was: linux-next: Tree for Oct 11 (mmc)) Date: Tue, 11 Oct 2011 14:59:34 -0700 Message-ID: <4E94BC46.5080505@xenotime.net> References: <1172297901.46681.1318361517579.JavaMail.root@zimbra-prod-mbox-2.vmware.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1172297901.46681.1318361517579.JavaMail.root@zimbra-prod-mbox-2.vmware.com> Sender: linux-next-owner@vger.kernel.org To: Andrei Warkentin Cc: Namjae Jeon , linux-next@vger.kernel.org, LKML , linux-mmc@vger.kernel.org, Chris Ball , Stephen Rothwell List-Id: linux-mmc@vger.kernel.org On 10/11/11 12:31, Andrei Warkentin wrote: > Hi Randy, > > ----- Original Message ----- >> From: "Randy Dunlap" >> To: "Stephen Rothwell" >> Cc: linux-next@vger.kernel.org, "LKML" , linux-mmc@vger.kernel.org, "Chris Ball" >> >> Sent: Tuesday, October 11, 2011 2:49:39 PM >> Subject: Re: linux-next: Tree for Oct 11 (mmc) >> >> On 10/11/11 02:11, Stephen Rothwell wrote: >>> Hi all, >>> >>> The linux-next tree is now available from >>> git://github.com/sfrothwell/linux-next.git as a temporary measure >>> while >>> the kernel.org servers are unavailable. >>> >>> It may also turn up on git.kernel.org (depending on the mirroring). >>> The >>> patch set is still absent, however. >>> >>> Changes since 20111007: >> >> >> When CONFIG_BLOCK is not enabled: >> >> In file included from >> next-2011-1011/drivers/mmc/card/sdio_uart.c:43:0: >> next-2011-1011/include/linux/mmc/card.h:175:12: error: >> 'DISK_NAME_LEN' undeclared here (not in a function) >> >> Deleting the #include fixes the sdio_uart.c build. >> However, the same problem occurs in mmc/core/core.c: >> > > Because linux/genhd is now included, oops. I'm pretty positive this is due to the "mmc : general purpose partition support" patch pulled recently. I am adding NamJae, who was the author. > >> In file included from next-2011-1011/drivers/mmc/core/core.c:30:0: >> next-2011-1011/include/linux/mmc/card.h:175:12: error: >> 'DISK_NAME_LEN' undeclared here (not in a function) >> >> Should mmc/core/ depend on BLOCK? or should it just be made >> to build even when BLOCK is not enabled? >> > > I don't think there should be a direct dependency on BLOCK. I have two suggestions - > 1) Have our own define similar to (and in fact smaller): > linux/genhd.h:#define DISK_NAME_LEN 32 > 2) Put the MMC physical partition code under an #ifdef CONFIG_BLOCK, which is a reasonable > proposition, given that there wouldn't be any need to parse physical partition info if > it would never be consumed by the MMC block driver. > > Thoughts? Agreed on part 2). Do part 1) if it is required, but it's usually better not to duplicate constants or structs etc. IOW, can DISK_NAME_LEN in linux/genhd.h be exposed even when CONFIG_BLOCK is not enabled? -- ~Randy *** Remember to use Documentation/SubmitChecklist when testing your code ***