[RFC PATCH 1/2] asm-generic: Remove pci.h copying code out to architectures

[Stafford Horne <shorne@gmail.com>]

The generic pci.h header provides a definition of pci_get_legacy_ide_irq
which is used by architectures that use PC-style interrupt numbers.

This patch removes the old pci.h in order to make room for a new
pci.h to be used by arm64, riscv, openrisc, etc.

The existing code in pci.h is moved out to architectures.

Suggested-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/lkml/CAK8P3a0JmPeczfmMBE__vn=Jbvf=nkbpVaZCycyv40pZNCJJXQ@mail.gmail.com/
Signed-off-by: Stafford Horne <shorne@gmail.com>
---
 arch/alpha/include/asm/pci.h   |  1 -
 arch/ia64/include/asm/pci.h    |  1 -
 arch/m68k/include/asm/pci.h    |  7 +++++--
 arch/powerpc/include/asm/pci.h |  1 -
 arch/s390/include/asm/pci.h    |  6 +++++-
 arch/sparc/include/asm/pci.h   |  5 ++++-
 arch/x86/include/asm/pci.h     |  6 ++++--
 arch/xtensa/include/asm/pci.h  |  6 ++++--
 include/asm-generic/pci.h      | 17 -----------------
 9 files changed, 22 insertions(+), 28 deletions(-)
 delete mode 100644 include/asm-generic/pci.h

diff --git a/arch/alpha/include/asm/pci.h b/arch/alpha/include/asm/pci.h
index cf6bc1e64d66..8ac5af0fc4da 100644
--- a/arch/alpha/include/asm/pci.h
+++ b/arch/alpha/include/asm/pci.h
@@ -56,7 +56,6 @@ struct pci_controller {
 
 /* IOMMU controls.  */
 
-/* TODO: integrate with include/asm-generic/pci.h ? */
 static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
 {
 	return channel ? 15 : 14;
diff --git a/arch/ia64/include/asm/pci.h b/arch/ia64/include/asm/pci.h
index 8c163d1d0189..218412d963c2 100644
--- a/arch/ia64/include/asm/pci.h
+++ b/arch/ia64/include/asm/pci.h
@@ -63,7 +63,6 @@ static inline int pci_proc_domain(struct pci_bus *bus)
 	return (pci_domain_nr(bus) != 0);
 }
 
-#define HAVE_ARCH_PCI_GET_LEGACY_IDE_IRQ
 static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
 {
 	return channel ? isa_irq_to_vector(15) : isa_irq_to_vector(14);
diff --git a/arch/m68k/include/asm/pci.h b/arch/m68k/include/asm/pci.h
index 5a4bc223743b..0c272ff515cc 100644
--- a/arch/m68k/include/asm/pci.h
+++ b/arch/m68k/include/asm/pci.h
@@ -2,11 +2,14 @@
 #ifndef _ASM_M68K_PCI_H
 #define _ASM_M68K_PCI_H
 
-#include <asm-generic/pci.h>
-
 #define	pcibios_assign_all_busses()	1
 
 #define	PCIBIOS_MIN_IO		0x00000100
 #define	PCIBIOS_MIN_MEM		0x02000000
 
+static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
+{
+	return channel ? 15 : 14;
+}
+
 #endif /* _ASM_M68K_PCI_H */
diff --git a/arch/powerpc/include/asm/pci.h b/arch/powerpc/include/asm/pci.h
index 915d6ee4b40a..f9da506751bb 100644
--- a/arch/powerpc/include/asm/pci.h
+++ b/arch/powerpc/include/asm/pci.h
@@ -39,7 +39,6 @@
 #define pcibios_assign_all_busses() \
 	(pci_has_flag(PCI_REASSIGN_ALL_BUS))
 
-#define HAVE_ARCH_PCI_GET_LEGACY_IDE_IRQ
 static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
 {
 	if (ppc_md.pci_get_legacy_ide_irq)
diff --git a/arch/s390/include/asm/pci.h b/arch/s390/include/asm/pci.h
index fdb9745ee998..93cd0167f8aa 100644
--- a/arch/s390/include/asm/pci.h
+++ b/arch/s390/include/asm/pci.h
@@ -6,7 +6,6 @@
 #include <linux/mutex.h>
 #include <linux/iommu.h>
 #include <linux/pci_hotplug.h>
-#include <asm-generic/pci.h>
 #include <asm/pci_clp.h>
 #include <asm/pci_debug.h>
 #include <asm/sclp.h>
@@ -233,6 +232,11 @@ int zpci_init_iommu(struct zpci_dev *zdev);
 void zpci_destroy_iommu(struct zpci_dev *zdev);
 
 #ifdef CONFIG_PCI
+static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
+{
+	return channel ? 15 : 14;
+}
+
 static inline bool zpci_use_mio(struct zpci_dev *zdev)
 {
 	return static_branch_likely(&have_mio) && zdev->mio_capable;
diff --git a/arch/sparc/include/asm/pci.h b/arch/sparc/include/asm/pci.h
index 4deddf430e5d..6d283fc7b55b 100644
--- a/arch/sparc/include/asm/pci.h
+++ b/arch/sparc/include/asm/pci.h
@@ -46,7 +46,10 @@ static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
 	return PCI_IRQ_NONE;
 }
 #else
-#include <asm-generic/pci.h>
+static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
+{
+	return channel ? 15 : 14;
+}
 #endif
 
 #endif /* ___ASM_SPARC_PCI_H */
diff --git a/arch/x86/include/asm/pci.h b/arch/x86/include/asm/pci.h
index f3fd5928bcbb..7da27f665cfe 100644
--- a/arch/x86/include/asm/pci.h
+++ b/arch/x86/include/asm/pci.h
@@ -105,8 +105,10 @@ static inline void early_quirks(void) { }
 
 extern void pci_iommu_alloc(void);
 
-/* generic pci stuff */
-#include <asm-generic/pci.h>
+static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
+{
+	return channel ? 15 : 14;
+}
 
 #ifdef CONFIG_NUMA
 /* Returns the node based on pci bus */
diff --git a/arch/xtensa/include/asm/pci.h b/arch/xtensa/include/asm/pci.h
index 8e2b48a268db..f57ede61f5db 100644
--- a/arch/xtensa/include/asm/pci.h
+++ b/arch/xtensa/include/asm/pci.h
@@ -43,7 +43,9 @@
 #define ARCH_GENERIC_PCI_MMAP_RESOURCE	1
 #define arch_can_pci_mmap_io()		1
 
-/* Generic PCI */
-#include <asm-generic/pci.h>
+static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
+{
+	return channel ? 15 : 14;
+}
 
 #endif	/* _XTENSA_PCI_H */
diff --git a/include/asm-generic/pci.h b/include/asm-generic/pci.h
deleted file mode 100644
index 6bb3cd3d695a..000000000000
--- a/include/asm-generic/pci.h
+++ /dev/null
@@ -1,17 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * linux/include/asm-generic/pci.h
- *
- *  Copyright (C) 2003 Russell King
- */
-#ifndef _ASM_GENERIC_PCI_H
-#define _ASM_GENERIC_PCI_H
-
-#ifndef HAVE_ARCH_PCI_GET_LEGACY_IDE_IRQ
-static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
-{
-	return channel ? 15 : 14;
-}
-#endif /* HAVE_ARCH_PCI_GET_LEGACY_IDE_IRQ */
-
-#endif /* _ASM_GENERIC_PCI_H */
-- 
2.36.1