Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
From:   =?UTF-8?q?Mateusz=20Jo=C5=84czyk?= <mat.jonczyk@o2.pl>
To:     linux-kernel@vger.kernel.org, x86@kernel.org
Cc:     =?UTF-8?q?Mateusz=20Jo=C5=84czyk?= <mat.jonczyk@o2.pl>,
        Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
        Dave Hansen <dave.hansen@linux.intel.com>,
        "H. Peter Anvin" <hpa@zytor.com>,
        William Breathitt Gray <vilhelm.gray@gmail.com>
Subject: [PATCH 10/10] x86/Kconfig: remove CONFIG_ISA_BUS
Date:   Mon, 28 Feb 2022 22:28:26 +0100
Message-Id: <20220228212826.27080-11-mat.jonczyk@o2.pl>
In-Reply-To: <20220228212826.27080-1-mat.jonczyk@o2.pl>
References: <20220228212826.27080-1-mat.jonczyk@o2.pl>
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Precedence: bulk

CONFIG_ISA_BUS was used only as a dependency for a single Industrial IO
driver: CONFIG_CIO_DAC ("Measurement Computing CIO-DAC IIO driver"). At
least grepping the kernel source for "ISA_BUS" did not find any other
meaningful results.

There are more configuration options that select CONFIG_ISA_BUS_API, but
did not depend on CONFIG_ISA_BUS. Most of these are for Industrial IO and
GPIO drivers.

Signed-off-by: Mateusz Jończyk <mat.jonczyk@o2.pl>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: x86@kernel.org
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: William Breathitt Gray <vilhelm.gray@gmail.com>
---
 arch/x86/Kconfig        | 11 -----------
 drivers/iio/dac/Kconfig |  2 +-
 2 files changed, 1 insertion(+), 12 deletions(-)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 19acc5954083..2de46adfbde2 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -2692,17 +2692,6 @@ config PCI_CNB20LE_QUIRK
 
 	  You should say N unless you know you need this.
 
-config ISA_BUS
-	bool "ISA bus support on modern systems" if EXPERT
-	help
-	  Expose ISA bus device drivers and options available for selection and
-	  configuration. Enable this option if your target machine has an ISA
-	  bus. ISA is an older system, displaced by PCI and newer bus
-	  architectures -- if your target machine is modern, it probably does
-	  not have an ISA bus.
-
-	  If unsure, say N.
-
 # x86_64 have no ISA slots, but can have ISA-style DMA.
 config ISA_DMA_API
 	bool "ISA-style DMA support" if (X86_64 && EXPERT)
diff --git a/drivers/iio/dac/Kconfig b/drivers/iio/dac/Kconfig
index bfcf7568de32..fe0f2a93055d 100644
--- a/drivers/iio/dac/Kconfig
+++ b/drivers/iio/dac/Kconfig
@@ -264,7 +264,7 @@ config AD8801
 
 config CIO_DAC
 	tristate "Measurement Computing CIO-DAC IIO driver"
-	depends on X86 && (ISA_BUS || PC104)
+	depends on X86
 	select ISA_BUS_API
 	help
 	  Say yes here to build support for the Measurement Computing CIO-DAC
-- 
2.25.1