linux-kernel - Re: [PATCH 3.11-rc1] crypto: Fix boot failure due to moduledependency.

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Message-Id: <201307162249.JEA41532.FFOLHVQJFtOOMS@I-love.SAKURA.ne.jp>
Date:	Tue, 16 Jul 2013 22:49:34 +0900
From:	Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
To:	herbert@...dor.apana.org.au
Cc:	tim.c.chen@...ux.intel.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3.11-rc1] crypto: Fix boot failure due to moduledependency.

Herbert Xu wrote:
> Looks like a bug in whatever is creating the initrd as it isn't
> including modules necessary for the boot.

It turned out that it is already wrong as of creating modules.dep.

  # grep crc /lib/modules/3.11.0-rc1/modules.dep
  kernel/crypto/crct10dif.ko:
  kernel/drivers/scsi/sd_mod.ko: kernel/lib/crc-t10dif.ko
  kernel/lib/crc-t10dif.ko:

modules.dep says

  (1) sd_mod.ko depends on crc-t10dif.ko
  (2) crc-t10dif.ko does not depend on crct10dif.ko

but commit 2d31e518 made crc-t10dif.ko depend on crct10dif.ko , didn't it?

crct10dif.ko need to be loaded before crc-t10dif.ko is loaded, but doing

diff --git a/lib/Kconfig b/lib/Kconfig
index 35da513..53ee0fd 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -68,6 +68,7 @@ config CRC_T10DIF
 	tristate "CRC calculation for the T10 Data Integrity Field"
 	select CRYPTO
 	select CRYPTO_CRCT10DIF
+	depends on CRYPTO_CRCT10DIF
 	help
 	  This option is only needed if a module that's not in the
 	  kernel tree needs to calculate CRC checks for use with the

causes below warning.

  crypto/Kconfig:379:     symbol CRYPTO_CRCT10DIF is selected by CRC_T10DIF
  warning: (BLK_DEV_SD && SCSI_LPFC && SCSI_DEBUG) selects CRC_T10DIF which has unmet direct dependencies (CRYPTO_CRCT10DIF)
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