powerpc/io: Remove PPC_IO_WORKAROUNDS

The Cell blade support was the last user of PPC_IO_WORKAROUNDS, so they
can now be removed.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Link: https://patch.msgid.link/20241218105523.416573-9-mpe@ellerman.id.au

Author: mpe

arch/powerpc/include/asm/io-workarounds.h

@@ -152,8 +152,6 @@ obj-$(CONFIG_PCI_MSI)		+= msi.o
 obj-$(CONFIG_AUDIT)		+= audit.o
 obj64-$(CONFIG_AUDIT)		+= compat_audit.o
 
-obj-$(CONFIG_PPC_IO_WORKAROUNDS)	+= io-workarounds.o
-
 obj-y				+= trace/
 
 ifneq ($(CONFIG_PPC_INDIRECT_PIO),y)

arch/powerpc/kernel/Makefile

@@ -4,7 +4,6 @@
 #include <linux/slab.h>
 #include <linux/mmzone.h>
 #include <linux/vmalloc.h>
-#include <asm/io-workarounds.h>
 
 unsigned long ioremap_bot;
 EXPORT_SYMBOL(ioremap_bot);
@@ -14,8 +13,6 @@ void __iomem *ioremap(phys_addr_t addr, unsigned long size)
 	pgprot_t prot = pgprot_noncached(PAGE_KERNEL);
 	void *caller = __builtin_return_address(0);
 
-	if (iowa_is_active())
-		return iowa_ioremap(addr, size, prot, caller);
 	return __ioremap_caller(addr, size, prot, caller);
 }
 EXPORT_SYMBOL(ioremap);
@@ -25,8 +22,6 @@ void __iomem *ioremap_wc(phys_addr_t addr, unsigned long size)
 	pgprot_t prot = pgprot_noncached_wc(PAGE_KERNEL);
 	void *caller = __builtin_return_address(0);
 
-	if (iowa_is_active())
-		return iowa_ioremap(addr, size, prot, caller);
 	return __ioremap_caller(addr, size, prot, caller);
 }
 EXPORT_SYMBOL(ioremap_wc);
@@ -36,8 +31,6 @@ void __iomem *ioremap_coherent(phys_addr_t addr, unsigned long size)
 	pgprot_t prot = pgprot_cached(PAGE_KERNEL);
 	void *caller = __builtin_return_address(0);
 
-	if (iowa_is_active())
-		return iowa_ioremap(addr, size, prot, caller);
 	return __ioremap_caller(addr, size, prot, caller);
 }
 
@@ -50,8 +43,6 @@ void __iomem *ioremap_prot(phys_addr_t addr, size_t size, unsigned long flags)
 	if (pte_write(pte))
 		pte = pte_mkdirty(pte);
 
-	if (iowa_is_active())
-		return iowa_ioremap(addr, size, pte_pgprot(pte), caller);
 	return __ioremap_caller(addr, size, pte_pgprot(pte), caller);
 }
 EXPORT_SYMBOL(ioremap_prot);

arch/powerpc/kernel/io-workarounds.c

@@ -189,9 +189,6 @@ config PPC_INDIRECT_PIO
 config PPC_INDIRECT_MMIO
 	bool
 
-config PPC_IO_WORKAROUNDS
-	bool
-
 source "drivers/cpufreq/Kconfig"
 
 menu "CPUIdle driver"