linux-kernel - [PATCH v6 2/4] lib: move pci

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Date: Wed, 31 Jan 2024 10:00:21 +0100
From: Philipp Stanner <pstanner@...hat.com>
To: Bjorn Helgaas <bhelgaas@...gle.com>,
	Arnd Bergmann <arnd@...db.de>,
	Johannes Berg <johannes@...solutions.net>,
	Randy Dunlap <rdunlap@...radead.org>,
	NeilBrown <neilb@...e.de>,
	John Sanpe <sanpeqf@...il.com>,
	Kent Overstreet <kent.overstreet@...il.com>,
	Niklas Schnelle <schnelle@...ux.ibm.com>,
	Philipp Stanner <pstanner@...hat.com>,
	Dave Jiang <dave.jiang@...el.com>,
	Uladzislau Koshchanka <koshchanka@...il.com>,
	"Masami Hiramatsu (Google)" <mhiramat@...nel.org>,
	David Gow <davidgow@...gle.com>,
	Kees Cook <keescook@...omium.org>,
	Rae Moar <rmoar@...gle.com>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	"wuqiang.matt" <wuqiang.matt@...edance.com>,
	Yury Norov <yury.norov@...il.com>,
	Jason Baron <jbaron@...mai.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Marco Elver <elver@...gle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Ben Dooks <ben.dooks@...ethink.co.uk>,
	dakr@...hat.com
Cc: linux-kernel@...r.kernel.org,
	linux-pci@...r.kernel.org,
	linux-arch@...r.kernel.org,
	stable@...r.kernel.org
Subject: [PATCH v6 2/4] lib: move pci_iomap.c to drivers/pci/

This file is guarded by an #ifdef CONFIG_PCI. It, consequently, does not
belong to lib/ because it is not generic infrastructure.

Move the file to drivers/pci/ and implement the necessary changes to
Makefiles and Kconfigs.

Update MAINTAINERS file.

Update Documentation.

Suggested-by: Danilo Krummrich <dakr@...hat.com>
Signed-off-by: Philipp Stanner <pstanner@...hat.com>
Reviewed-by: Arnd Bergmann <arnd@...db.de>
---
 Documentation/driver-api/device-io.rst | 2 +-
 Documentation/driver-api/pci/pci.rst   | 3 +++
 MAINTAINERS                            | 1 -
 drivers/pci/Kconfig                    | 5 +++++
 drivers/pci/Makefile                   | 1 +
 lib/pci_iomap.c => drivers/pci/iomap.c | 3 ---
 lib/Kconfig                            | 3 ---
 lib/Makefile                           | 1 -
 8 files changed, 10 insertions(+), 9 deletions(-)
 rename lib/pci_iomap.c => drivers/pci/iomap.c (99%)

diff --git a/Documentation/driver-api/device-io.rst b/Documentation/driver-api/device-io.rst
index d55384b106bd..d9ba2dfd1239 100644
--- a/Documentation/driver-api/device-io.rst
+++ b/Documentation/driver-api/device-io.rst
@@ -518,5 +518,5 @@ Public Functions Provided
 .. kernel-doc:: arch/x86/include/asm/io.h
    :internal:
 
-.. kernel-doc:: lib/pci_iomap.c
+.. kernel-doc:: drivers/pci/iomap.c
    :export:
diff --git a/Documentation/driver-api/pci/pci.rst b/Documentation/driver-api/pci/pci.rst
index 4843cfad4f60..bacf23bf1343 100644
--- a/Documentation/driver-api/pci/pci.rst
+++ b/Documentation/driver-api/pci/pci.rst
@@ -4,6 +4,9 @@ PCI Support Library
 .. kernel-doc:: drivers/pci/pci.c
    :export:
 
+.. kernel-doc:: drivers/pci/iomap.c
+   :export:
+
 .. kernel-doc:: drivers/pci/pci-driver.c
    :export:
 
diff --git a/MAINTAINERS b/MAINTAINERS
index 8d1052fa6a69..395fcaad63e7 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -16954,7 +16954,6 @@ F:	include/asm-generic/pci*
 F:	include/linux/of_pci.h
 F:	include/linux/pci*
 F:	include/uapi/linux/pci*
-F:	lib/pci*
 
 PCIE DRIVER FOR AMAZON ANNAPURNA LABS
 M:	Jonathan Chocron <jonnyc@...zon.com>
diff --git a/drivers/pci/Kconfig b/drivers/pci/Kconfig
index 74147262625b..d35001589d88 100644
--- a/drivers/pci/Kconfig
+++ b/drivers/pci/Kconfig
@@ -13,6 +13,11 @@ config FORCE_PCI
 	select HAVE_PCI
 	select PCI
 
+# select this to provide a generic PCI iomap,
+# without PCI itself having to be defined
+config GENERIC_PCI_IOMAP
+	bool
+
 menuconfig PCI
 	bool "PCI support"
 	depends on HAVE_PCI
diff --git a/drivers/pci/Makefile b/drivers/pci/Makefile
index cc8b4e01e29d..64dcedccfc87 100644
--- a/drivers/pci/Makefile
+++ b/drivers/pci/Makefile
@@ -14,6 +14,7 @@ ifdef CONFIG_PCI
 obj-$(CONFIG_PROC_FS)		+= proc.o
 obj-$(CONFIG_SYSFS)		+= slot.o
 obj-$(CONFIG_ACPI)		+= pci-acpi.o
+obj-$(CONFIG_GENERIC_PCI_IOMAP) += iomap.o
 endif
 
 obj-$(CONFIG_OF)		+= of.o
diff --git a/lib/pci_iomap.c b/drivers/pci/iomap.c
similarity index 99%
rename from lib/pci_iomap.c
rename to drivers/pci/iomap.c
index 2829ddb0e316..c9725428e387 100644
--- a/lib/pci_iomap.c
+++ b/drivers/pci/iomap.c
@@ -9,7 +9,6 @@
 
 #include <linux/export.h>
 
-#ifdef CONFIG_PCI
 /**
  * pci_iomap_range - create a virtual mapping cookie for a PCI BAR
  * @dev: PCI device that owns the BAR
@@ -176,5 +175,3 @@ void pci_iounmap(struct pci_dev *dev, void __iomem *p)
 EXPORT_SYMBOL(pci_iounmap);
 
 #endif /* ARCH_WANTS_GENERIC_PCI_IOUNMAP */
-
-#endif /* CONFIG_PCI */
diff --git a/lib/Kconfig b/lib/Kconfig
index 5ddda7c2ed9b..4557bb8a5256 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -70,9 +70,6 @@ source "lib/math/Kconfig"
 config NO_GENERIC_PCI_IOPORT_MAP
 	bool
 
-config GENERIC_PCI_IOMAP
-	bool
-
 config GENERIC_IOMAP
 	bool
 	select GENERIC_PCI_IOMAP
diff --git a/lib/Makefile b/lib/Makefile
index 6b09731d8e61..0800289ec6c5 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -153,7 +153,6 @@ CFLAGS_debug_info.o += $(call cc-option, -femit-struct-debug-detailed=any)
 obj-y += math/ crypto/
 
 obj-$(CONFIG_GENERIC_IOMAP) += iomap.o
-obj-$(CONFIG_GENERIC_PCI_IOMAP) += pci_iomap.o
 obj-$(CONFIG_HAS_IOMEM) += iomap_copy.o devres.o
 obj-$(CONFIG_CHECK_SIGNATURE) += check_signature.o
 obj-$(CONFIG_DEBUG_LOCKING_API_SELFTESTS) += locking-selftest.o
-- 
2.43.0