ARM: Remove DISCONTIGMEM support

Everything should now be using sparsemem rather than discontigmem, so
remove the code supporting discontigmem from ARM.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/Kconfig

@@ -719,7 +719,6 @@ config ARCH_SHARK
 config ARCH_LH7A40X
 	bool "Sharp LH7A40X"
 	select CPU_ARM922T
-	select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
 	select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
 	select ARCH_USES_GETTIMEOFFSET
 	help
@@ -1241,24 +1240,14 @@ config OABI_COMPAT
 config ARCH_HAS_HOLES_MEMORYMODEL
 	bool
 
-# Discontigmem is deprecated
-config ARCH_DISCONTIGMEM_ENABLE
-	bool
-
 config ARCH_SPARSEMEM_ENABLE
 	bool
 
 config ARCH_SPARSEMEM_DEFAULT
 	def_bool ARCH_SPARSEMEM_ENABLE
 
 config ARCH_SELECT_MEMORY_MODEL
-	def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
-
-config NODES_SHIFT
-	int
-	default "4" if ARCH_LH7A40X
-	default "2"
-	depends on NEED_MULTIPLE_NODES
+	def_bool ARCH_SPARSEMEM_ENABLE
 
 config HIGHMEM
 	bool "High Memory Support (EXPERIMENTAL)"

arch/arm/include/asm/memory.h

@@ -234,76 +234,11 @@ static inline __deprecated void *bus_to_virt(unsigned long x)
  *  virt_to_page(k)	convert a _valid_ virtual address to struct page *
  *  virt_addr_valid(k)	indicates whether a virtual address is valid
  */
-#ifndef CONFIG_DISCONTIGMEM
-
 #define ARCH_PFN_OFFSET		PHYS_PFN_OFFSET
 
 #define virt_to_page(kaddr)	pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
 #define virt_addr_valid(kaddr)	((unsigned long)(kaddr) >= PAGE_OFFSET && (unsigned long)(kaddr) < (unsigned long)high_memory)
 
-#define PHYS_TO_NID(addr)	(0)
-
-#else /* CONFIG_DISCONTIGMEM */
-
-/*
- * This is more complex.  We have a set of mem_map arrays spread
- * around in memory.
- */
-#include <linux/numa.h>
-
-#define arch_pfn_to_nid(pfn)	PFN_TO_NID(pfn)
-#define arch_local_page_offset(pfn, nid) LOCAL_MAP_NR((pfn) << PAGE_SHIFT)
-
-#define virt_to_page(kaddr)					\
-	(ADDR_TO_MAPBASE(kaddr) + LOCAL_MAP_NR(kaddr))
-
-#define virt_addr_valid(kaddr)	(KVADDR_TO_NID(kaddr) < MAX_NUMNODES)
-
-/*
- * Common discontigmem stuff.
- *  PHYS_TO_NID is used by the ARM kernel/setup.c
- */
-#define PHYS_TO_NID(addr)	PFN_TO_NID((addr) >> PAGE_SHIFT)
-
-/*
- * Given a kaddr, ADDR_TO_MAPBASE finds the owning node of the memory
- * and returns the mem_map of that node.
- */
-#define ADDR_TO_MAPBASE(kaddr)	NODE_MEM_MAP(KVADDR_TO_NID(kaddr))
-
-/*
- * Given a page frame number, find the owning node of the memory
- * and returns the mem_map of that node.
- */
-#define PFN_TO_MAPBASE(pfn)	NODE_MEM_MAP(PFN_TO_NID(pfn))
-
-#ifdef NODE_MEM_SIZE_BITS
-#define NODE_MEM_SIZE_MASK	((1 << NODE_MEM_SIZE_BITS) - 1)
-
-/*
- * Given a kernel address, find the home node of the underlying memory.
- */
-#define KVADDR_TO_NID(addr) \
-	(((unsigned long)(addr) - PAGE_OFFSET) >> NODE_MEM_SIZE_BITS)
-
-/*
- * Given a page frame number, convert it to a node id.
- */
-#define PFN_TO_NID(pfn) \
-	(((pfn) - PHYS_PFN_OFFSET) >> (NODE_MEM_SIZE_BITS - PAGE_SHIFT))
-
-/*
- * Given a kaddr, LOCAL_MEM_MAP finds the owning node of the memory
- * and returns the index corresponding to the appropriate page in the
- * node's mem_map.
- */
-#define LOCAL_MAP_NR(addr) \
-	(((unsigned long)(addr) & NODE_MEM_SIZE_MASK) >> PAGE_SHIFT)
-
-#endif /* NODE_MEM_SIZE_BITS */
-
-#endif /* !CONFIG_DISCONTIGMEM */
-
 /*
  * Optional coherency support.  Currently used only by selected
  * Intel XSC3-based systems.

arch/arm/include/asm/setup.h

@@ -201,8 +201,7 @@ static struct tagtable __tagtable_##fn __tag = { tag, fn }
 struct membank {
 	unsigned long start;
 	unsigned long size;
-	unsigned short node;
-	unsigned short highmem;
+	unsigned int highmem;
 };
 
 struct meminfo {
@@ -212,9 +211,8 @@ struct meminfo {
 
 extern struct meminfo meminfo;
 
-#define for_each_nodebank(iter,mi,no)			\
-	for (iter = 0; iter < (mi)->nr_banks; iter++)	\
-		if ((mi)->bank[iter].node == no)
+#define for_each_bank(iter,mi)				\
+	for (iter = 0; iter < (mi)->nr_banks; iter++)
 
 #define bank_pfn_start(bank)	__phys_to_pfn((bank)->start)
 #define bank_pfn_end(bank)	__phys_to_pfn((bank)->start + (bank)->size)

arch/arm/kernel/setup.c

@@ -402,13 +402,12 @@ static int __init arm_add_memory(unsigned long start, unsigned long size)
 	size -= start & ~PAGE_MASK;
 	bank->start = PAGE_ALIGN(start);
 	bank->size  = size & PAGE_MASK;
-	bank->node  = PHYS_TO_NID(start);
 
 	/*
 	 * Check whether this memory region has non-zero size or
 	 * invalid node number.
 	 */
-	if (bank->size == 0 || bank->node >= MAX_NUMNODES)
+	if (bank->size == 0)
 		return -EINVAL;
 
 	meminfo.nr_banks++;

arch/arm/mach-aaec2000/include/mach/memory.h

@@ -14,14 +14,4 @@
 
 #define PHYS_OFFSET	UL(0xf0000000)
 
-/*
- * The nodes are the followings:
- *
- *   node 0: 0xf000.0000 - 0xf3ff.ffff
- *   node 1: 0xf400.0000 - 0xf7ff.ffff
- *   node 2: 0xf800.0000 - 0xfbff.ffff
- *   node 3: 0xfc00.0000 - 0xffff.ffff
- */
-#define NODE_MEM_SIZE_BITS	26
-
 #endif /* __ASM_ARCH_MEMORY_H */

arch/arm/mach-clps711x/Kconfig

@@ -30,7 +30,6 @@ config ARCH_CLEP7312
 config ARCH_EDB7211
 	bool "EDB7211"
 	select ISA
-	select ARCH_DISCONTIGMEM_ENABLE
 	select ARCH_SPARSEMEM_ENABLE
 	select ARCH_SELECT_MEMORY_MODEL
 	help

arch/arm/mach-clps711x/clep7312.c

@@ -32,7 +32,6 @@ fixup_clep7312(struct machine_desc *desc, struct tag *tags,
 	mi->nr_banks=1;
 	mi->bank[0].start = 0xc0000000;
 	mi->bank[0].size = 0x01000000;
-	mi->bank[0].node = 0;
 }
 
 

arch/arm/mach-clps711x/edb7211-arch.c

@@ -43,10 +43,8 @@ fixup_edb7211(struct machine_desc *desc, struct tag *tags,
 	 */
 	mi->bank[0].start = 0xc0000000;
 	mi->bank[0].size = 8*1024*1024;
-	mi->bank[0].node = 0;
 	mi->bank[1].start = 0xc1000000;
 	mi->bank[1].size = 8*1024*1024;
-	mi->bank[1].node = 1;
 	mi->nr_banks = 2;
 }
 

arch/arm/mach-clps711x/fortunet.c

@@ -39,7 +39,6 @@ struct meminfo memmap = {
 		{
 			.start	= 0xC0000000,
 			.size	= 0x01000000,
-			.node	= 0
 		},
 	},
 };

arch/arm/mach-clps711x/include/mach/memory.h

@@ -20,7 +20,6 @@
 #ifndef __ASM_ARCH_MEMORY_H
 #define __ASM_ARCH_MEMORY_H
 
-
 /*
  * Physical DRAM offset.
  */
@@ -72,7 +71,6 @@
  * 	node 2:  0xd0000000 - 0xd7ffffff
  * 	node 3:  0xd8000000 - 0xdfffffff
  */
-#define NODE_MEM_SIZE_BITS	24
 #define SECTION_SIZE_BITS	24
 #define MAX_PHYSMEM_BITS	32
 

arch/arm/mach-iop13xx/include/mach/memory.h

@@ -69,6 +69,4 @@ static inline unsigned long __lbus_to_virt(dma_addr_t x)
 #endif /* CONFIG_ARCH_IOP13XX */
 #endif /* !ASSEMBLY */
 
-#define PFN_TO_NID(addr)	(0)
-
 #endif

arch/arm/mach-lh7a40x/include/mach/memory.h

@@ -19,50 +19,6 @@
  */
 #define PHYS_OFFSET	UL(0xc0000000)
 
-#ifdef CONFIG_DISCONTIGMEM
-
-/*
- * Given a kernel address, find the home node of the underlying memory.
- */
-
-# ifdef CONFIG_LH7A40X_ONE_BANK_PER_NODE
-#  define KVADDR_TO_NID(addr) \
-  (  ((((unsigned long) (addr) - PAGE_OFFSET) >> 24) &  1)\
-   | ((((unsigned long) (addr) - PAGE_OFFSET) >> 25) & ~1))
-# else  /* 2 banks per node */
-#  define KVADDR_TO_NID(addr) \
-      (((unsigned long) (addr) - PAGE_OFFSET) >> 26)
-# endif
-
-/*
- * Given a page frame number, convert it to a node id.
- */
-
-# ifdef CONFIG_LH7A40X_ONE_BANK_PER_NODE
-#  define PFN_TO_NID(pfn) \
-  (((((pfn) - PHYS_PFN_OFFSET) >> (24 - PAGE_SHIFT)) &  1)\
- | ((((pfn) - PHYS_PFN_OFFSET) >> (25 - PAGE_SHIFT)) & ~1))
-# else  /* 2 banks per node */
-#  define PFN_TO_NID(pfn) \
-    (((pfn) - PHYS_PFN_OFFSET) >> (26 - PAGE_SHIFT))
-#endif
-
-/*
- * Given a kaddr, LOCAL_MEM_MAP finds the owning node of the memory
- * and returns the index corresponding to the appropriate page in the
- * node's mem_map.
- */
-
-# ifdef CONFIG_LH7A40X_ONE_BANK_PER_NODE
-#  define LOCAL_MAP_NR(addr) \
-       (((unsigned long)(addr) & 0x003fffff) >> PAGE_SHIFT)
-# else  /* 2 banks per node */
-#  define LOCAL_MAP_NR(addr) \
-       (((unsigned long)(addr) & 0x01ffffff) >> PAGE_SHIFT)
-# endif
-
-#endif
-
 /*
  * Sparsemem version of the above
  */

arch/arm/mach-msm/board-trout.c

@@ -50,7 +50,6 @@ static void __init trout_fixup(struct machine_desc *desc, struct tag *tags,
 {
 	mi->nr_banks = 1;
 	mi->bank[0].start = PHYS_OFFSET;
-	mi->bank[0].node = PHYS_TO_NID(PHYS_OFFSET);
 	mi->bank[0].size = (101*1024*1024);
 }
 

arch/arm/mach-pxa/corgi.c

@@ -715,7 +715,6 @@ static void __init fixup_corgi(struct machine_desc *desc,
 	sharpsl_save_param();
 	mi->nr_banks=1;
 	mi->bank[0].start = 0xa0000000;
-	mi->bank[0].node = 0;
 	if (machine_is_corgi())
 		mi->bank[0].size = (32*1024*1024);
 	else

arch/arm/mach-pxa/eseries.c

@@ -34,7 +34,6 @@ void __init eseries_fixup(struct machine_desc *desc,
 {
 	mi->nr_banks=1;
 	mi->bank[0].start = 0xa0000000;
-	mi->bank[0].node = 0;
 	if (machine_is_e800())
 		mi->bank[0].size = (128*1024*1024);
 	else

arch/arm/mach-pxa/generic.h

@@ -26,8 +26,7 @@ extern unsigned int get_clk_frequency_khz(int info);
 
 #define SET_BANK(__nr,__start,__size) \
 	mi->bank[__nr].start = (__start), \
-	mi->bank[__nr].size = (__size), \
-	mi->bank[__nr].node = (((unsigned)(__start) - PHYS_OFFSET) >> 27)
+	mi->bank[__nr].size = (__size)
 
 #define ARRAY_AND_SIZE(x)	(x), ARRAY_SIZE(x)
 

arch/arm/mach-pxa/include/mach/memory.h

@@ -17,18 +17,6 @@
  */
 #define PHYS_OFFSET	UL(0xa0000000)
 
-/*
- * The nodes are matched with the physical SDRAM banks as follows:
- *
- * 	node 0:  0xa0000000-0xa3ffffff	-->  0xc0000000-0xc3ffffff
- * 	node 1:  0xa4000000-0xa7ffffff	-->  0xc4000000-0xc7ffffff
- * 	node 2:  0xa8000000-0xabffffff	-->  0xc8000000-0xcbffffff
- * 	node 3:  0xac000000-0xafffffff	-->  0xcc000000-0xcfffffff
- *
- * This needs a node mem size of 26 bits.
- */
-#define NODE_MEM_SIZE_BITS	26
-
 #if !defined(__ASSEMBLY__) && defined(CONFIG_MACH_ARMCORE) && defined(CONFIG_PCI)
 void cmx2xx_pci_adjust_zones(int node, unsigned long *size,
 			     unsigned long *holes);

arch/arm/mach-pxa/poodle.c

@@ -463,7 +463,6 @@ static void __init fixup_poodle(struct machine_desc *desc,
 	sharpsl_save_param();
 	mi->nr_banks=1;
 	mi->bank[0].start = 0xa0000000;
-	mi->bank[0].node = 0;
 	mi->bank[0].size = (32*1024*1024);
 }
 

arch/arm/mach-pxa/spitz.c

@@ -847,7 +847,6 @@ static void __init fixup_spitz(struct machine_desc *desc,
 	sharpsl_save_param();
 	mi->nr_banks = 1;
 	mi->bank[0].start = 0xa0000000;
-	mi->bank[0].node = 0;
 	mi->bank[0].size = (64*1024*1024);
 }
 

arch/arm/mach-pxa/tosa.c

@@ -948,7 +948,6 @@ static void __init fixup_tosa(struct machine_desc *desc,
 	sharpsl_save_param();
 	mi->nr_banks=1;
 	mi->bank[0].start = 0xa0000000;
-	mi->bank[0].node = 0;
 	mi->bank[0].size = (64*1024*1024);
 }
 

arch/arm/mach-s3c2412/mach-smdk2413.c

@@ -119,7 +119,6 @@ static void __init smdk2413_fixup(struct machine_desc *desc,
 		mi->nr_banks=1;
 		mi->bank[0].start = 0x30000000;
 		mi->bank[0].size = SZ_64M;
-		mi->bank[0].node = 0;
 	}
 }
 

arch/arm/mach-s3c2412/mach-vstms.c

@@ -137,7 +137,6 @@ static void __init vstms_fixup(struct machine_desc *desc,
 		mi->nr_banks=1;
 		mi->bank[0].start = 0x30000000;
 		mi->bank[0].size = SZ_64M;
-		mi->bank[0].node = 0;
 	}
 }