Merge master.kernel.org:/home/rmk/linux-2.6-arm

10 files changed, 86 insertions, 72 deletions

diff --git a/arch/arm/common/dmabounce.c b/arch/arm/common/dmabounce.c
index 9d63a01..cbf2165 100644
--- a/arch/arm/common/dmabounce.c
+++ b/arch/arm/common/dmabounce.c
@@ -93,15 +93,12 @@ static void print_alloc_stats(struct dmabounce_device_info *device_info)
 static inline struct dmabounce_device_info *
 find_dmabounce_dev(struct device *dev)
 {
-	struct list_head *entry;
-
-	list_for_each(entry, &dmabounce_devs) {
-		struct dmabounce_device_info *d =
-			list_entry(entry, struct dmabounce_device_info, node);
+	struct dmabounce_device_info *d;
 
+	list_for_each_entry(d, &dmabounce_devs, node)
 		if (d->dev == dev)
 			return d;
-	}
+
 	return NULL;
 }
 
@@ -172,15 +169,11 @@ alloc_safe_buffer(struct dmabounce_device_info *device_info, void *ptr,
 static inline struct safe_buffer *
 find_safe_buffer(struct dmabounce_device_info *device_info, dma_addr_t safe_dma_addr)
 {
-	struct list_head *entry;
-
-	list_for_each(entry, &device_info->safe_buffers) {
-		struct safe_buffer *b =
-			list_entry(entry, struct safe_buffer, node);
+	struct safe_buffer *b;
 
+	list_for_each_entry(b, &device_info->safe_buffers, node)
 		if (b->safe_dma_addr == safe_dma_addr)
 			return b;
-	}
 
 	return NULL;
 }
@@ -301,7 +294,6 @@ unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
 			__func__, buf->ptr, (void *) virt_to_dma(dev, buf->ptr),
 			buf->safe, (void *) buf->safe_dma_addr);
 
-
 		DO_STATS ( device_info->bounce_count++ );
 
 		if (dir == DMA_FROM_DEVICE || dir == DMA_BIDIRECTIONAL) {
diff --git a/arch/arm/common/sa1111.c b/arch/arm/common/sa1111.c
index 21fce34..38c2eb6 100644
--- a/arch/arm/common/sa1111.c
+++ b/arch/arm/common/sa1111.c
@@ -721,16 +721,17 @@ __sa1111_probe(struct device *me, struct resource *mem, int irq)
 	return ret;
 }
 
+static int sa1111_remove_one(struct device *dev, void *data)
+{
+	device_unregister(dev);
+	return 0;
+}
+
 static void __sa1111_remove(struct sa1111 *sachip)
 {
-	struct list_head *l, *n;
 	void __iomem *irqbase = sachip->base + SA1111_INTC;
 
-	list_for_each_safe(l, n, &sachip->dev->children) {
-		struct device *d = list_to_dev(l);
-
-		device_unregister(d);
-	}
+	device_for_each_child(sachip->dev, NULL, sa1111_remove_one);
 
 	/* disable all IRQs */
 	sa1111_writel(0, irqbase + SA1111_INTEN0);
diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index 9fed5fa..8cf733d 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -395,6 +395,20 @@ static void __init early_initrd(char **p)
 }
 __early_param("initrd=", early_initrd);
 
+static void __init add_memory(unsigned long start, unsigned long size)
+{
+	/*
+	 * Ensure that start/size are aligned to a page boundary.
+	 * Size is appropriately rounded down, start is rounded up.
+	 */
+	size -= start & ~PAGE_MASK;
+
+	meminfo.bank[meminfo.nr_banks].start = PAGE_ALIGN(start);
+	meminfo.bank[meminfo.nr_banks].size  = size & PAGE_MASK;
+	meminfo.bank[meminfo.nr_banks].node  = PHYS_TO_NID(start);
+	meminfo.nr_banks += 1;
+}
+
 /*
  * Pick out the memory size.  We look for mem=size@start,
  * where start and size are "size[KkMm]"
@@ -419,10 +433,7 @@ static void __init early_mem(char **p)
 	if (**p == '@')
 		start = memparse(*p + 1, p);
 
-	meminfo.bank[meminfo.nr_banks].start = start;
-	meminfo.bank[meminfo.nr_banks].size  = size;
-	meminfo.bank[meminfo.nr_banks].node  = PHYS_TO_NID(start);
-	meminfo.nr_banks += 1;
+	add_memory(start, size);
 }
 __early_param("mem=", early_mem);
 
@@ -564,11 +575,7 @@ static int __init parse_tag_mem32(const struct tag *tag)
 			tag->u.mem.start, tag->u.mem.size / 1024);
 		return -EINVAL;
 	}
-	meminfo.bank[meminfo.nr_banks].start = tag->u.mem.start;
-	meminfo.bank[meminfo.nr_banks].size  = tag->u.mem.size;
-	meminfo.bank[meminfo.nr_banks].node  = PHYS_TO_NID(tag->u.mem.start);
-	meminfo.nr_banks += 1;
-
+	add_memory(tag->u.mem.start, tag->u.mem.size);
 	return 0;
 }
 
diff --git a/arch/arm/kernel/signal.c b/arch/arm/kernel/signal.c
index 931919f..07ddeed61 100644
--- a/arch/arm/kernel/signal.c
+++ b/arch/arm/kernel/signal.c
@@ -19,6 +19,7 @@
 #include <asm/unistd.h>
 
 #include "ptrace.h"
+#include "signal.h"
 
 #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
 
@@ -35,7 +36,7 @@
 #define SWI_THUMB_SIGRETURN	(0xdf00 << 16 | 0x2700 | (__NR_sigreturn - __NR_SYSCALL_BASE))
 #define SWI_THUMB_RT_SIGRETURN	(0xdf00 << 16 | 0x2700 | (__NR_rt_sigreturn - __NR_SYSCALL_BASE))
 
-static const unsigned long retcodes[4] = {
+const unsigned long sigreturn_codes[4] = {
 	SWI_SYS_SIGRETURN,	SWI_THUMB_SIGRETURN,
 	SWI_SYS_RT_SIGRETURN,	SWI_THUMB_RT_SIGRETURN
 };
@@ -500,17 +501,25 @@ setup_return(struct pt_regs *regs, struct k_sigaction *ka,
 		if (ka->sa.sa_flags & SA_SIGINFO)
 			idx += 2;
 
-		if (__put_user(retcodes[idx], rc))
+		if (__put_user(sigreturn_codes[idx], rc))
 			return 1;
 
-		/*
-		 * Ensure that the instruction cache sees
-		 * the return code written onto the stack.
-		 */
-		flush_icache_range((unsigned long)rc,
-				   (unsigned long)(rc + 1));
-
-		retcode = ((unsigned long)rc) + thumb;
+		if (cpsr & MODE32_BIT) {
+			/*
+			 * 32-bit code can use the new high-page
+			 * signal return code support.
+			 */
+			retcode = KERN_SIGRETURN_CODE + (idx << 2) + thumb;
+		} else {
+			/*
+			 * Ensure that the instruction cache sees
+			 * the return code written onto the stack.
+			 */
+			flush_icache_range((unsigned long)rc,
+					   (unsigned long)(rc + 1));
+
+			retcode = ((unsigned long)rc) + thumb;
+		}
 	}
 
 	regs->ARM_r0 = usig;
diff --git a/arch/arm/kernel/signal.h b/arch/arm/kernel/signal.h
new file mode 100644
index 0000000..91d26fa
--- /dev/null
+++ b/arch/arm/kernel/signal.h
@@ -0,0 +1,12 @@
+/*
+ *  linux/arch/arm/kernel/signal.h
+ *
+ *  Copyright (C) 2005 Russell King.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#define KERN_SIGRETURN_CODE	0xffff0500
+
+extern const unsigned long sigreturn_codes[4];
diff --git a/arch/arm/kernel/traps.c b/arch/arm/kernel/traps.c
index 45d2a03..2fb0a4c 100644
--- a/arch/arm/kernel/traps.c
+++ b/arch/arm/kernel/traps.c
@@ -30,6 +30,7 @@
 #include <asm/traps.h>
 
 #include "ptrace.h"
+#include "signal.h"
 
 const char *processor_modes[]=
 { "USER_26", "FIQ_26" , "IRQ_26" , "SVC_26" , "UK4_26" , "UK5_26" , "UK6_26" , "UK7_26" ,
@@ -683,6 +684,14 @@ void __init trap_init(void)
 	memcpy((void *)0xffff0000, __vectors_start, __vectors_end - __vectors_start);
 	memcpy((void *)0xffff0200, __stubs_start, __stubs_end - __stubs_start);
 	memcpy((void *)0xffff1000 - kuser_sz, __kuser_helper_start, kuser_sz);
+
+	/*
+	 * Copy signal return handlers into the vector page, and
+	 * set sigreturn to be a pointer to these.
+	 */
+	memcpy((void *)KERN_SIGRETURN_CODE, sigreturn_codes,
+	       sizeof(sigreturn_codes));
+
 	flush_icache_range(0xffff0000, 0xffff0000 + PAGE_SIZE);
 	modify_domain(DOMAIN_USER, DOMAIN_CLIENT);
 }
diff --git a/arch/arm/mach-clps7500/core.c b/arch/arm/mach-clps7500/core.c
index fdfeded..0bc7da4 100644
--- a/arch/arm/mach-clps7500/core.c
+++ b/arch/arm/mach-clps7500/core.c
@@ -26,6 +26,8 @@
 #include <asm/irq.h>
 #include <asm/mach-types.h>
 
+unsigned int vram_size;
+
 static void cl7500_ack_irq_a(unsigned int irq)
 {
 	unsigned int val, mask;
diff --git a/arch/arm/mach-rpc/riscpc.c b/arch/arm/mach-rpc/riscpc.c
index 815c532..4371068 100644
--- a/arch/arm/mach-rpc/riscpc.c
+++ b/arch/arm/mach-rpc/riscpc.c
@@ -32,10 +32,7 @@
 
 extern void rpc_init_irq(void);
 
-extern unsigned int vram_size;
-
-#if 0
-
+unsigned int vram_size;
 unsigned int memc_ctrl_reg;
 unsigned int number_mfm_drives;
 
@@ -63,8 +60,6 @@ static int __init parse_tag_acorn(const struct tag *tag)
 
 __tagtable(ATAG_ACORN, parse_tag_acorn);
 
-#endif
-
 static struct map_desc rpc_io_desc[] __initdata = {
  { SCREEN_BASE,	SCREEN_START,	2*1048576, MT_DEVICE }, /* VRAM		*/
  { (u32)IO_BASE, IO_START,	IO_SIZE	 , MT_DEVICE }, /* IO space	*/
diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index 72a2b8c..c08710b 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -93,14 +93,7 @@ struct node_info {
 };
 
 #define O_PFN_DOWN(x)	((x) >> PAGE_SHIFT)
-#define V_PFN_DOWN(x)	O_PFN_DOWN(__pa(x))
-
 #define O_PFN_UP(x)	(PAGE_ALIGN(x) >> PAGE_SHIFT)
-#define V_PFN_UP(x)	O_PFN_UP(__pa(x))
-
-#define PFN_SIZE(x)	((x) >> PAGE_SHIFT)
-#define PFN_RANGE(s,e)	PFN_SIZE(PAGE_ALIGN((unsigned long)(e)) - \
-				(((unsigned long)(s)) & PAGE_MASK))
 
 /*
  * FIXME: We really want to avoid allocating the bootmap bitmap
@@ -113,7 +106,7 @@ find_bootmap_pfn(int node, struct meminfo *mi, unsigned int bootmap_pages)
 {
 	unsigned int start_pfn, bank, bootmap_pfn;
 
-	start_pfn   = V_PFN_UP(&_end);
+	start_pfn   = O_PFN_UP(__pa(&_end));
 	bootmap_pfn = 0;
 
 	for (bank = 0; bank < mi->nr_banks; bank ++) {
@@ -122,9 +115,9 @@ find_bootmap_pfn(int node, struct meminfo *mi, unsigned int bootmap_pages)
 		if (mi->bank[bank].node != node)
 			continue;
 
-		start = O_PFN_UP(mi->bank[bank].start);
-		end   = O_PFN_DOWN(mi->bank[bank].size +
-				   mi->bank[bank].start);
+		start = mi->bank[bank].start >> PAGE_SHIFT;
+		end   = (mi->bank[bank].size +
+			 mi->bank[bank].start) >> PAGE_SHIFT;
 
 		if (end < start_pfn)
 			continue;
@@ -191,8 +184,8 @@ find_memend_and_nodes(struct meminfo *mi, struct node_info *np)
 		/*
 		 * Get the start and end pfns for this bank
 		 */
-		start = O_PFN_UP(mi->bank[i].start);
-		end   = O_PFN_DOWN(mi->bank[i].start + mi->bank[i].size);
+		start = mi->bank[i].start >> PAGE_SHIFT;
+		end   = (mi->bank[i].start + mi->bank[i].size) >> PAGE_SHIFT;
 
 		if (np[node].start > start)
 			np[node].start = start;
diff --git a/include/asm-arm/pgalloc.h b/include/asm-arm/pgalloc.h
index e814f81..bc18ff4 100644
--- a/include/asm-arm/pgalloc.h
+++ b/include/asm-arm/pgalloc.h
@@ -89,6 +89,13 @@ static inline void pte_free(struct page *pte)
 	__free_page(pte);
 }
 
+static inline void __pmd_populate(pmd_t *pmdp, unsigned long pmdval)
+{
+	pmdp[0] = __pmd(pmdval);
+	pmdp[1] = __pmd(pmdval + 256 * sizeof(pte_t));
+	flush_pmd_entry(pmdp);
+}
+
 /*
  * Populate the pmdp entry with a pointer to the pte.  This pmd is part
  * of the mm address space.
@@ -99,32 +106,19 @@ static inline void
 pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmdp, pte_t *ptep)
 {
 	unsigned long pte_ptr = (unsigned long)ptep;
-	unsigned long pmdval;
-
-	BUG_ON(mm != &init_mm);
 
 	/*
 	 * The pmd must be loaded with the physical
 	 * address of the PTE table
 	 */
 	pte_ptr -= PTRS_PER_PTE * sizeof(void *);
-	pmdval = __pa(pte_ptr) | _PAGE_KERNEL_TABLE;
-	pmdp[0] = __pmd(pmdval);
-	pmdp[1] = __pmd(pmdval + 256 * sizeof(pte_t));
-	flush_pmd_entry(pmdp);
+	__pmd_populate(pmdp, __pa(pte_ptr) | _PAGE_KERNEL_TABLE);
 }
 
 static inline void
 pmd_populate(struct mm_struct *mm, pmd_t *pmdp, struct page *ptep)
 {
-	unsigned long pmdval;
-
-	BUG_ON(mm == &init_mm);
-
-	pmdval = page_to_pfn(ptep) << PAGE_SHIFT | _PAGE_USER_TABLE;
-	pmdp[0] = __pmd(pmdval);
-	pmdp[1] = __pmd(pmdval + 256 * sizeof(pte_t));
-	flush_pmd_entry(pmdp);
+	__pmd_populate(pmdp, page_to_pfn(ptep) << PAGE_SHIFT | _PAGE_USER_TABLE);
 }
 
 #endif