[ARM] sparse: fix several warnings

arch/arm/kernel/process.c:270:6: warning: symbol 'show_fpregs' was not declared. Should it be static?

This function isn't used, so can be removed.

arch/arm/kernel/setup.c:532:9: warning: symbol 'len' shadows an earlier one
arch/arm/kernel/setup.c:524:6: originally declared here

A function containing two 'len's.

arch/arm/mm/fault-armv.c:188:13: warning: symbol 'check_writebuffer_bugs' was not declared. Should it be static?
arch/arm/mm/mmap.c:122:5: warning: symbol 'valid_phys_addr_range' was not declared. Should it be static?
arch/arm/mm/mmap.c:137:5: warning: symbol 'valid_mmap_phys_addr_range' was not declared. Should it be static?

Missing includes.

arch/arm/kernel/traps.c:71:77: warning: Using plain integer as NULL pointer
arch/arm/mm/ioremap.c:355:46: error: incompatible types in comparison expression (different address spaces)

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

arch/arm/kernel/process.c

@@ -267,35 +267,6 @@ void show_regs(struct pt_regs * regs)
 	__backtrace();
 }
 
-void show_fpregs(struct user_fp *regs)
-{
-	int i;
-
-	for (i = 0; i < 8; i++) {
-		unsigned long *p;
-		char type;
-
-		p = (unsigned long *)(regs->fpregs + i);
-
-		switch (regs->ftype[i]) {
-			case 1: type = 'f'; break;
-			case 2: type = 'd'; break;
-			case 3: type = 'e'; break;
-			default: type = '?'; break;
-		}
-		if (regs->init_flag)
-			type = '?';
-
-		printk("  f%d(%c): %08lx %08lx %08lx%c",
-			i, type, p[0], p[1], p[2], i & 1 ? '\n' : ' ');
-	}
-			
-
-	printk("FPSR: %08lx FPCR: %08lx\n",
-		(unsigned long)regs->fpsr,
-		(unsigned long)regs->fpcr);
-}
-
 /*
  * Free current thread data structures etc..
  */

arch/arm/kernel/setup.c

@@ -529,12 +529,12 @@ static void __init parse_cmdline(char **cmdline_p, char *from)
 			struct early_params *p;
 
 			for (p = &__early_begin; p < &__early_end; p++) {
-				int len = strlen(p->arg);
+				int arglen = strlen(p->arg);
 
-				if (memcmp(from, p->arg, len) == 0) {
+				if (memcmp(from, p->arg, arglen) == 0) {
 					if (to != command_line)
 						to -= 1;
-					from += len;
+					from += arglen;
 					p->fn(&from);
 
 					while (*from != ' ' && *from != '\0')

arch/arm/kernel/traps.c

@@ -68,7 +68,8 @@ void dump_backtrace_entry(unsigned long where, unsigned long from, unsigned long
  */
 static int verify_stack(unsigned long sp)
 {
-	if (sp < PAGE_OFFSET || (sp > (unsigned long)high_memory && high_memory != 0))
+	if (sp < PAGE_OFFSET ||
+	    (sp > (unsigned long)high_memory && high_memory != NULL))
 		return -EFAULT;
 
 	return 0;

arch/arm/mm/fault-armv.c

@@ -17,6 +17,7 @@
 #include <linux/init.h>
 #include <linux/pagemap.h>
 
+#include <asm/bugs.h>
 #include <asm/cacheflush.h>
 #include <asm/cachetype.h>
 #include <asm/pgtable.h>

arch/arm/mm/ioremap.c

@@ -333,15 +333,14 @@ __arm_ioremap(unsigned long phys_addr, size_t size, unsigned int mtype)
 }
 EXPORT_SYMBOL(__arm_ioremap);
 
-void __iounmap(volatile void __iomem *addr)
+void __iounmap(volatile void __iomem *io_addr)
 {
+	void *addr = (void *)(PAGE_MASK & (unsigned long)io_addr);
 #ifndef CONFIG_SMP
 	struct vm_struct **p, *tmp;
 #endif
 	unsigned int section_mapping = 0;
 
-	addr = (volatile void __iomem *)(PAGE_MASK & (unsigned long)addr);
-
 #ifndef CONFIG_SMP
 	/*
 	 * If this is a section based mapping we need to handle it
@@ -352,7 +351,7 @@ void __iounmap(volatile void __iomem *addr)
 	 */
 	write_lock(&vmlist_lock);
 	for (p = &vmlist ; (tmp = *p) ; p = &tmp->next) {
-		if((tmp->flags & VM_IOREMAP) && (tmp->addr == addr)) {
+		if ((tmp->flags & VM_IOREMAP) && (tmp->addr == addr)) {
 			if (tmp->flags & VM_ARM_SECTION_MAPPING) {
 				*p = tmp->next;
 				unmap_area_sections((unsigned long)tmp->addr,
@@ -367,6 +366,6 @@ void __iounmap(volatile void __iomem *addr)
 #endif
 
 	if (!section_mapping)
-		vunmap((void __force *)addr);
+		vunmap(addr);
 }
 EXPORT_SYMBOL(__iounmap);

arch/arm/mm/mmap.c

@@ -6,6 +6,7 @@
 #include <linux/mman.h>
 #include <linux/shm.h>
 #include <linux/sched.h>
+#include <linux/io.h>
 #include <asm/cputype.h>
 #include <asm/system.h>