linux-kernel - [PATCH] kbuild : Make Fusion MPT selectable from "Device drivers" menu

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Date:	Thu, 7 Dec 2006 06:59:52 -0500 (EST)
From:	"Robert P. J. Day" <rpjday@...dspring.com>
To:	Linux kernel mailing list <linux-kernel@...r.kernel.org>
Subject: [PATCH] kbuild : Make Fusion MPT selectable from "Device drivers"
 menu


  Rewrite the Fusion MPT Kconfig file so that all of MPT functionality
is entirely selectable from "Device drivers."

Signed-off-by: Robert P. J. Day <rpjday@...dspring.com>

---

  The original Kconfig file seems to have an odd structure, as you can
see from the first part of the file:

========================================================
menu "Fusion MPT device support"

config FUSION
        bool
        default n

config FUSION_SPI
        tristate "Fusion MPT ScsiHost drivers for SPI"
        depends on PCI && SCSI
        select FUSION
        select SCSI_SPI_ATTRS
        ...
========================================================

  note how the majority of entries in that file don't directly
*depend* on FUSION.  instead, they depend on *external* config
variables, and *select* FUSION, and this is not the only place i've
noticed that kind of dependency wording.

  is that a regular feature?  having that structure certainly makes it
slightly more difficult to rewrite the menu entries, and it's not
clear there's any obvious advantage to doing it that way.


diff --git a/drivers/message/fusion/Kconfig b/drivers/message/fusion/Kconfig
index ea31d84..b2da14d 100644
--- a/drivers/message/fusion/Kconfig
+++ b/drivers/message/fusion/Kconfig
@@ -1,14 +1,12 @@
-
-menu "Fusion MPT device support"
-
-config FUSION
-	bool
+menuconfig FUSION
+	bool "Fusion MPT device support"
 	default n

+if FUSION
+
 config FUSION_SPI
 	tristate "Fusion MPT ScsiHost drivers for SPI"
 	depends on PCI && SCSI
-	select FUSION
 	select SCSI_SPI_ATTRS
 	---help---
 	  SCSI HOST support for a parallel SCSI host adapters.
@@ -23,7 +21,6 @@ config FUSION_SPI
 config FUSION_FC
 	tristate "Fusion MPT ScsiHost drivers for FC"
 	depends on PCI && SCSI
-	select FUSION
 	select SCSI_FC_ATTRS
 	---help---
 	  SCSI HOST support for a Fiber Channel host adapters.
@@ -40,7 +37,6 @@ config FUSION_FC
 config FUSION_SAS
 	tristate "Fusion MPT ScsiHost drivers for SAS"
 	depends on PCI && SCSI
- 	select FUSION
 	select SCSI_SAS_ATTRS
 	---help---
 	  SCSI HOST support for a SAS host adapters.
@@ -100,4 +96,4 @@ config FUSION_LAN

 	  If unsure whether you really want or need this, say N.

-endmenu
+endif
-
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