x86: clean up arch/x86/kernel/e820_64.c

White space and coding style cleanup.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

arch/x86/kernel/e820_64.c

@@ -109,8 +109,10 @@ int
 e820_any_mapped(unsigned long start, unsigned long end, unsigned type)
 {
 	int i;
+
 	for (i = 0; i < e820.nr_map; i++) {
 		struct e820entry *ei = &e820.map[i];
+
 		if (type && ei->type != type)
 			continue;
 		if (ei->addr >= end || ei->addr + ei->size <= start)
@@ -127,11 +129,14 @@ EXPORT_SYMBOL_GPL(e820_any_mapped);
  * Note: this function only works correct if the e820 table is sorted and
  * not-overlapping, which is the case
  */
-int __init e820_all_mapped(unsigned long start, unsigned long end, unsigned type)
+int __init e820_all_mapped(unsigned long start, unsigned long end,
+			   unsigned type)
 {
 	int i;
+
 	for (i = 0; i < e820.nr_map; i++) {
 		struct e820entry *ei = &e820.map[i];
+
 		if (type && ei->type != type)
 			continue;
 		/* is the region (part) in overlap with the current region ?*/
@@ -143,9 +148,12 @@ int __init e820_all_mapped(unsigned long start, unsigned long end, unsigned type
 		 */
 		if (ei->addr <= start)
 			start = ei->addr + ei->size;
-		/* if start is now at or beyond end, we're done, full coverage */
+		/*
+		 * if start is now at or beyond end, we're done, full
+		 * coverage
+		 */
 		if (start >= end)
-			return 1; /* we're done */
+			return 1;
 	}
 	return 0;
 }
@@ -153,12 +161,15 @@ int __init e820_all_mapped(unsigned long start, unsigned long end, unsigned type
 /*
  * Find a free area in a specific range.
  */
-unsigned long __init find_e820_area(unsigned long start, unsigned long end, unsigned size) 
+unsigned long __init find_e820_area(unsigned long start, unsigned long end,
+				    unsigned size)
 {
 	int i;
+
 	for (i = 0; i < e820.nr_map; i++) {
 		struct e820entry *ei = &e820.map[i];
 		unsigned long addr = ei->addr, last;
+
 		if (ei->type != E820_RAM)
 			continue;
 		if (addr < start)
@@ -182,7 +193,8 @@ unsigned long __init find_e820_area(unsigned long start, unsigned long end, unsi
  */
 unsigned long __init e820_end_of_ram(void)
 {
-	unsigned long end_pfn = 0;
+	unsigned long end_pfn;
+
 	end_pfn = find_max_pfn_with_active_regions();
 
 	if (end_pfn > end_pfn_map)
@@ -194,7 +206,7 @@ unsigned long __init e820_end_of_ram(void)
 	if (end_pfn > end_pfn_map)
 		end_pfn = end_pfn_map;
 
-	printk("end_pfn_map = %lu\n", end_pfn_map);
+	printk(KERN_INFO "end_pfn_map = %lu\n", end_pfn_map);
 	return end_pfn;
 }
 
@@ -349,9 +361,7 @@ unsigned long __init e820_hole_size(unsigned long start, unsigned long end)
 {
 	unsigned long start_pfn = start >> PAGE_SHIFT;
 	unsigned long end_pfn = end >> PAGE_SHIFT;
-	unsigned long ei_startpfn;
-	unsigned long ei_endpfn;
-	unsigned long ram = 0;
+	unsigned long ei_startpfn, ei_endpfn, ram = 0;
 	int i;
 
 	for (i = 0; i < e820.nr_map; i++) {
@@ -370,20 +380,23 @@ void __init e820_print_map(char *who)
 	for (i = 0; i < e820.nr_map; i++) {
 		printk(KERN_INFO " %s: %016Lx - %016Lx ", who,
 		       (unsigned long long) e820.map[i].addr,
-			(unsigned long long) (e820.map[i].addr + e820.map[i].size));
+		       (unsigned long long)
+		       (e820.map[i].addr + e820.map[i].size));
 		switch (e820.map[i].type) {
-		case E820_RAM:	printk("(usable)\n");
+		case E820_RAM:
+			printk(KERN_CONT "(usable)\n");
 			break;
 		case E820_RESERVED:
-				printk("(reserved)\n");
+			printk(KERN_CONT "(reserved)\n");
 			break;
 		case E820_ACPI:
-				printk("(ACPI data)\n");
+			printk(KERN_CONT "(ACPI data)\n");
 			break;
 		case E820_NVS:
-				printk("(ACPI NVS)\n");
+			printk(KERN_CONT "(ACPI NVS)\n");
 			break;
-		default:	printk("type %u\n", e820.map[i].type);
+		default:
+			printk(KERN_CONT "type %u\n", e820.map[i].type);
 			break;
 		}
 	}
@@ -396,7 +409,7 @@ void __init e820_print_map(char *who)
  * replaces the original e820 map with a new one, removing overlaps.
  *
  */
-static int __init sanitize_e820_map(struct e820entry * biosmap, char * pnr_map)
+static int __init sanitize_e820_map(struct e820entry *biosmap, char *pnr_map)
 {
 	struct change_member {
 		struct e820entry *pbios; /* pointer to original bios entry */
@@ -416,7 +429,8 @@ static int __init sanitize_e820_map(struct e820entry * biosmap, char * pnr_map)
 	int i;
 
 	/*
-		Visually we're performing the following (1,2,3,4 = memory types)...
+		Visually we're performing the following
+		(1,2,3,4 = memory types)...
 
 		Sample memory map (w/overlaps):
 		   ____22__________________
@@ -458,22 +472,23 @@ static int __init sanitize_e820_map(struct e820entry * biosmap, char * pnr_map)
 	old_nr = *pnr_map;
 
 	/* bail out if we find any unreasonable addresses in bios map */
-	for (i=0; i<old_nr; i++)
+	for (i = 0; i < old_nr; i++)
 		if (biosmap[i].addr + biosmap[i].size < biosmap[i].addr)
 			return -1;
 
 	/* create pointers for initial change-point information (for sorting) */
-	for (i=0; i < 2*old_nr; i++)
+	for (i = 0; i < 2 * old_nr; i++)
 		change_point[i] = &change_point_list[i];
 
 	/* record all known change-points (starting and ending addresses),
 	   omitting those that are for empty memory regions */
 	chgidx = 0;
-	for (i=0; i < old_nr; i++)	{
+	for (i = 0; i < old_nr; i++)	{
 		if (biosmap[i].size != 0) {
 			change_point[chgidx]->addr = biosmap[i].addr;
 			change_point[chgidx++]->pbios = &biosmap[i];
-			change_point[chgidx]->addr = biosmap[i].addr + biosmap[i].size;
+			change_point[chgidx]->addr = biosmap[i].addr +
+				biosmap[i].size;
 			change_point[chgidx++]->pbios = &biosmap[i];
 		}
 	}
@@ -483,75 +498,106 @@ static int __init sanitize_e820_map(struct e820entry * biosmap, char * pnr_map)
 	still_changing = 1;
 	while (still_changing)	{
 		still_changing = 0;
-		for (i=1; i < chg_nr; i++)  {
-			/* if <current_addr> > <last_addr>, swap */
-			/* or, if current=<start_addr> & last=<end_addr>, swap */
-			if ((change_point[i]->addr < change_point[i-1]->addr) ||
-				((change_point[i]->addr == change_point[i-1]->addr) &&
-				 (change_point[i]->addr == change_point[i]->pbios->addr) &&
-				 (change_point[i-1]->addr != change_point[i-1]->pbios->addr))
-			   )
-			{
+		for (i = 1; i < chg_nr; i++)  {
+			unsigned long long curaddr, lastaddr;
+			unsigned long long curpbaddr, lastpbaddr;
+
+			curaddr = change_point[i]->addr;
+			lastaddr = change_point[i - 1]->addr;
+			curpbaddr = change_point[i]->pbios->addr;
+			lastpbaddr = change_point[i - 1]->pbios->addr;
+
+			/*
+			 * swap entries, when:
+			 *
+			 * curaddr > lastaddr or
+			 * curaddr == lastaddr and curaddr == curpbaddr and
+			 * lastaddr != lastpbaddr
+			 */
+			if (curaddr < lastaddr ||
+			    (curaddr == lastaddr && curaddr == curpbaddr &&
+			     lastaddr != lastpbaddr)) {
 				change_tmp = change_point[i];
 				change_point[i] = change_point[i-1];
 				change_point[i-1] = change_tmp;
-				still_changing=1;
+				still_changing = 1;
 			}
 		}
 	}
 
 	/* create a new bios memory map, removing overlaps */
-	overlap_entries=0;	 /* number of entries in the overlap table */
-	new_bios_entry=0;	 /* index for creating new bios map entries */
+	overlap_entries = 0;	 /* number of entries in the overlap table */
+	new_bios_entry = 0;	 /* index for creating new bios map entries */
 	last_type = 0;		 /* start with undefined memory type */
 	last_addr = 0;		 /* start with 0 as last starting address */
+
 	/* loop through change-points, determining affect on the new bios map */
-	for (chgidx=0; chgidx < chg_nr; chgidx++)
-	{
+	for (chgidx = 0; chgidx < chg_nr; chgidx++) {
 		/* keep track of all overlapping bios entries */
-		if (change_point[chgidx]->addr == change_point[chgidx]->pbios->addr)
-		{
-			/* add map entry to overlap list (> 1 entry implies an overlap) */
-			overlap_list[overlap_entries++]=change_point[chgidx]->pbios;
-		}
-		else
-		{
-			/* remove entry from list (order independent, so swap with last) */
-			for (i=0; i<overlap_entries; i++)
-			{
-				if (overlap_list[i] == change_point[chgidx]->pbios)
-					overlap_list[i] = overlap_list[overlap_entries-1];
+		if (change_point[chgidx]->addr ==
+		    change_point[chgidx]->pbios->addr) {
+			/*
+			 * add map entry to overlap list (> 1 entry
+			 * implies an overlap)
+			 */
+			overlap_list[overlap_entries++] =
+				change_point[chgidx]->pbios;
+		} else {
+			/*
+			 * remove entry from list (order independent,
+			 * so swap with last)
+			 */
+			for (i = 0; i < overlap_entries; i++) {
+				if (overlap_list[i] ==
+				    change_point[chgidx]->pbios)
+					overlap_list[i] =
+						overlap_list[overlap_entries-1];
 			}
 			overlap_entries--;
 		}
-		/* if there are overlapping entries, decide which "type" to use */
-		/* (larger value takes precedence -- 1=usable, 2,3,4,4+=unusable) */
+		/*
+		 * if there are overlapping entries, decide which
+		 * "type" to use (larger value takes precedence --
+		 * 1=usable, 2,3,4,4+=unusable)
+		 */
 		current_type = 0;
-		for (i=0; i<overlap_entries; i++)
+		for (i = 0; i < overlap_entries; i++)
 			if (overlap_list[i]->type > current_type)
 				current_type = overlap_list[i]->type;
-		/* continue building up new bios map based on this information */
+		/*
+		 * continue building up new bios map based on this
+		 * information
+		 */
 		if (current_type != last_type)	{
 			if (last_type != 0)	 {
 				new_bios[new_bios_entry].size =
 					change_point[chgidx]->addr - last_addr;
-				/* move forward only if the new size was non-zero */
+				/*
+				 * move forward only if the new size
+				 * was non-zero
+				 */
 				if (new_bios[new_bios_entry].size != 0)
+					/*
+					 * no more space left for new
+					 * bios entries ?
+					 */
 					if (++new_bios_entry >= E820MAX)
-						break; 	/* no more space left for new bios entries */
+						break;
 			}
 			if (current_type != 0)	{
-				new_bios[new_bios_entry].addr = change_point[chgidx]->addr;
+				new_bios[new_bios_entry].addr =
+					change_point[chgidx]->addr;
 				new_bios[new_bios_entry].type = current_type;
-				last_addr=change_point[chgidx]->addr;
+				last_addr = change_point[chgidx]->addr;
 			}
 			last_type = current_type;
 		}
 	}
-	new_nr = new_bios_entry;   /* retain count for new bios entries */
+	/* retain count for new bios entries */
+	new_nr = new_bios_entry;
 
 	/* copy new bios mapping into original location */
-	memcpy(biosmap, new_bios, new_nr*sizeof(struct e820entry));
+	memcpy(biosmap, new_bios, new_nr * sizeof(struct e820entry));
 	*pnr_map = new_nr;
 
 	return 0;
@@ -566,7 +612,7 @@ static int __init sanitize_e820_map(struct e820entry * biosmap, char * pnr_map)
  * will have given us a memory map that we can use to properly
  * set up memory.  If we aren't, we'll fake a memory map.
  */
-static int __init copy_e820_map(struct e820entry * biosmap, int nr_map)
+static int __init copy_e820_map(struct e820entry *biosmap, int nr_map)
 {
 	/* Only one memory region (or negative)? Ignore it */
 	if (nr_map < 2)
@@ -583,7 +629,7 @@ static int __init copy_e820_map(struct e820entry * biosmap, int nr_map)
 			return -1;
 
 		add_memory_region(start, size, type);
-	} while (biosmap++,--nr_map);
+	} while (biosmap++, --nr_map);
 	return 0;
 }
 
@@ -627,9 +673,9 @@ static int __init parse_memmap_opt(char *p)
 
 	if (!strcmp(p, "exactmap")) {
 #ifdef CONFIG_CRASH_DUMP
-		/* If we are doing a crash dump, we
-		 * still need to know the real mem
-		 * size before original memory map is
+		/*
+		 * If we are doing a crash dump, we still need to know
+		 * the real mem size before original memory map is
 		 * reset.
 		 */
 		e820_register_active_regions(0, 0, -1UL);
@@ -713,8 +759,10 @@ __init void e820_setup_gap(void)
 
 	if (!found) {
 		gapstart = (end_pfn << PAGE_SHIFT) + 1024*1024;
-		printk(KERN_ERR "PCI: Warning: Cannot find a gap in the 32bit address range\n"
-		       KERN_ERR "PCI: Unassigned devices with 32bit resource registers may break!\n");
+		printk(KERN_ERR "PCI: Warning: Cannot find a gap in the 32bit "
+		       "address range\n"
+		       KERN_ERR "PCI: Unassigned devices with 32bit resource "
+		       "registers may break!\n");
 	}
 
 	/*
@@ -727,7 +775,8 @@ __init void e820_setup_gap(void)
 	/* Fun with two's complement */
 	pci_mem_start = (gapstart + round) & -round;
 
-	printk(KERN_INFO "Allocating PCI resources starting at %lx (gap: %lx:%lx)\n",
+	printk(KERN_INFO
+	       "Allocating PCI resources starting at %lx (gap: %lx:%lx)\n",
 	       pci_mem_start, gapstart, gapsize);
 }