X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=lib%2Fvsprintf.c;h=46d34b0b74a873290b0cd9fcfff6c19561c91de4;hb=90b9a32d8f441369b2f97a765d2d957b531eb653;hp=be3001f912e4d906999242971f42146ebc07cc43;hpb=ed681a91ab805341675d166a9592551093c0a2d9;p=safe%2Fjmp%2Flinux-2.6

diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index be3001f..46d34b0 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -9,7 +9,7 @@
  * Wirzenius wrote this portably, Torvalds fucked it up :-)
  */
 
-/* 
+/*
  * Fri Jul 13 2001 Crutcher Dunnavant <crutcher+kernel@datastacks.com>
  * - changed to provide snprintf and vsnprintf functions
  * So Feb  1 16:51:32 CET 2004 Juergen Quade <quade@hsnr.de>
@@ -25,6 +25,7 @@
 #include <linux/kallsyms.h>
 #include <linux/uaccess.h>
 #include <linux/ioport.h>
+#include <net/addrconf.h>
 
 #include <asm/page.h>		/* for PAGE_SIZE */
 #include <asm/div64.h>
@@ -46,14 +47,14 @@ static unsigned int simple_guess_base(const char *cp)
 }
 
 /**
- * simple_strtoul - convert a string to an unsigned long
+ * simple_strtoull - convert a string to an unsigned long long
  * @cp: The start of the string
  * @endp: A pointer to the end of the parsed string will be placed here
  * @base: The number base to use
  */
-unsigned long simple_strtoul(const char *cp, char **endp, unsigned int base)
+unsigned long long simple_strtoull(const char *cp, char **endp, unsigned int base)
 {
-	unsigned long result = 0;
+	unsigned long long result = 0;
 
 	if (!base)
 		base = simple_guess_base(cp);
@@ -70,58 +71,39 @@ unsigned long simple_strtoul(const char *cp, char **endp, unsigned int base)
 		result = result * base + value;
 		cp++;
 	}
-
 	if (endp)
 		*endp = (char *)cp;
+
 	return result;
 }
-EXPORT_SYMBOL(simple_strtoul);
+EXPORT_SYMBOL(simple_strtoull);
 
 /**
- * simple_strtol - convert a string to a signed long
+ * simple_strtoul - convert a string to an unsigned long
  * @cp: The start of the string
  * @endp: A pointer to the end of the parsed string will be placed here
  * @base: The number base to use
  */
-long simple_strtol(const char *cp, char **endp, unsigned int base)
+unsigned long simple_strtoul(const char *cp, char **endp, unsigned int base)
 {
-	if(*cp == '-')
-		return -simple_strtoul(cp + 1, endp, base);
-	return simple_strtoul(cp, endp, base);
+	return simple_strtoull(cp, endp, base);
 }
-EXPORT_SYMBOL(simple_strtol);
+EXPORT_SYMBOL(simple_strtoul);
 
 /**
- * simple_strtoull - convert a string to an unsigned long long
+ * simple_strtol - convert a string to a signed long
  * @cp: The start of the string
  * @endp: A pointer to the end of the parsed string will be placed here
  * @base: The number base to use
  */
-unsigned long long simple_strtoull(const char *cp, char **endp, unsigned int base)
+long simple_strtol(const char *cp, char **endp, unsigned int base)
 {
-	unsigned long long result = 0;
-
-	if (!base)
-		base = simple_guess_base(cp);
-
-	if (base == 16 && cp[0] == '0' && TOLOWER(cp[1]) == 'x')
-		cp += 2;
-
-	while (isxdigit(*cp)) {
-		unsigned int value;
-
-		value = isdigit(*cp) ? *cp - '0' : TOLOWER(*cp) - 'a' + 10;
-		if (value >= base)
-			break;
-		result = result * base + value;
-		cp++;
-	}
+	if (*cp == '-')
+		return -simple_strtoul(cp + 1, endp, base);
 
-	if (endp)
-		*endp = (char *)cp;
-	return result;
+	return simple_strtoul(cp, endp, base);
 }
-EXPORT_SYMBOL(simple_strtoull);
+EXPORT_SYMBOL(simple_strtol);
 
 /**
  * simple_strtoll - convert a string to a signed long long
@@ -131,10 +113,12 @@ EXPORT_SYMBOL(simple_strtoull);
  */
 long long simple_strtoll(const char *cp, char **endp, unsigned int base)
 {
-	if(*cp=='-')
+	if (*cp == '-')
 		return -simple_strtoull(cp + 1, endp, base);
+
 	return simple_strtoull(cp, endp, base);
 }
+EXPORT_SYMBOL(simple_strtoll);
 
 /**
  * strict_strtoul - convert a string to an unsigned long strictly
@@ -172,6 +156,7 @@ int strict_strtoul(const char *cp, unsigned int base, unsigned long *res)
 	val = simple_strtoul(cp, &tail, base);
 	if (tail == cp)
 		return -EINVAL;
+
 	if ((*tail == '\0') ||
 		((len == (size_t)(tail - cp) + 1) && (*tail == '\n'))) {
 		*res = val;
@@ -284,10 +269,11 @@ EXPORT_SYMBOL(strict_strtoll);
 
 static int skip_atoi(const char **s)
 {
-	int i=0;
+	int i = 0;
 
 	while (isdigit(**s))
 		i = i*10 + *((*s)++) - '0';
+
 	return i;
 }
 
@@ -301,7 +287,7 @@ static int skip_atoi(const char **s)
 /* Formats correctly any integer in [0,99999].
  * Outputs from one to five digits depending on input.
  * On i386 gcc 4.1.2 -O2: ~250 bytes of code. */
-static char* put_dec_trunc(char *buf, unsigned q)
+static char *put_dec_trunc(char *buf, unsigned q)
 {
 	unsigned d3, d2, d1, d0;
 	d1 = (q>>4) & 0xf;
@@ -330,14 +316,15 @@ static char* put_dec_trunc(char *buf, unsigned q)
 				d3 = d3 - 10*q;
 				*buf++ = d3 + '0';  /* next digit */
 				if (q != 0)
-					*buf++ = q + '0';  /* most sign. digit */
+					*buf++ = q + '0'; /* most sign. digit */
 			}
 		}
 	}
+
 	return buf;
 }
 /* Same with if's removed. Always emits five digits */
-static char* put_dec_full(char *buf, unsigned q)
+static char *put_dec_full(char *buf, unsigned q)
 {
 	/* BTW, if q is in [0,9999], 8-bit ints will be enough, */
 	/* but anyway, gcc produces better code with full-sized ints */
@@ -346,14 +333,15 @@ static char* put_dec_full(char *buf, unsigned q)
 	d2 = (q>>8) & 0xf;
 	d3 = (q>>12);
 
-	/* Possible ways to approx. divide by 10 */
-	/* gcc -O2 replaces multiply with shifts and adds */
-	// (x * 0xcd) >> 11: 11001101 - shorter code than * 0x67 (on i386)
-	// (x * 0x67) >> 10:  1100111
-	// (x * 0x34) >> 9:    110100 - same
-	// (x * 0x1a) >> 8:     11010 - same
-	// (x * 0x0d) >> 7:      1101 - same, shortest code (on i386)
-
+	/*
+	 * Possible ways to approx. divide by 10
+	 * gcc -O2 replaces multiply with shifts and adds
+	 * (x * 0xcd) >> 11: 11001101 - shorter code than * 0x67 (on i386)
+	 * (x * 0x67) >> 10:  1100111
+	 * (x * 0x34) >> 9:    110100 - same
+	 * (x * 0x1a) >> 8:     11010 - same
+	 * (x * 0x0d) >> 7:      1101 - same, shortest code (on i386)
+	 */
 	d0 = 6*(d3 + d2 + d1) + (q & 0xf);
 	q = (d0 * 0xcd) >> 11;
 	d0 = d0 - 10*q;
@@ -374,10 +362,11 @@ static char* put_dec_full(char *buf, unsigned q)
 				d3 = d3 - 10*q;
 				*buf++ = d3 + '0';
 					*buf++ = q + '0';
+
 	return buf;
 }
 /* No inlining helps gcc to use registers better */
-static noinline char* put_dec(char *buf, unsigned long long num)
+static noinline char *put_dec(char *buf, unsigned long long num)
 {
 	while (1) {
 		unsigned rem;
@@ -393,8 +382,8 @@ static noinline char* put_dec(char *buf, unsigned long long num)
 #define PLUS	4		/* show plus */
 #define SPACE	8		/* space if plus */
 #define LEFT	16		/* left justified */
-#define SMALL	32		/* Must be 32 == 0x20 */
-#define SPECIAL	64		/* 0x */
+#define SMALL	32		/* use lowercase in hex (must be 32 == 0x20) */
+#define SPECIAL	64		/* prefix hex with "0x", octal with "0" */
 
 enum format_type {
 	FORMAT_TYPE_NONE, /* Just a string part */
@@ -408,6 +397,8 @@ enum format_type {
 	FORMAT_TYPE_LONG_LONG,
 	FORMAT_TYPE_ULONG,
 	FORMAT_TYPE_LONG,
+	FORMAT_TYPE_UBYTE,
+	FORMAT_TYPE_BYTE,
 	FORMAT_TYPE_USHORT,
 	FORMAT_TYPE_SHORT,
 	FORMAT_TYPE_UINT,
@@ -418,12 +409,12 @@ enum format_type {
 };
 
 struct printf_spec {
-	enum format_type	type;
-	int			flags;		/* flags to number() */
-	int			field_width;	/* width of output field */
-	int			base;
-	int			precision;	/* # of digits/chars */
-	int			qualifier;
+	u8	type;		/* format_type enum */
+	u8	flags;		/* flags to number() */
+	u8	base;		/* number base, 8, 10 or 16 only */
+	u8	qualifier;	/* number qualifier, one of 'hHlLtzZ' */
+	s16	field_width;	/* width of output field */
+	s16	precision;	/* # of digits/chars */
 };
 
 static char *number(char *buf, char *end, unsigned long long num,
@@ -445,9 +436,9 @@ static char *number(char *buf, char *end, unsigned long long num,
 		spec.flags &= ~ZEROPAD;
 	sign = 0;
 	if (spec.flags & SIGN) {
-		if ((signed long long) num < 0) {
+		if ((signed long long)num < 0) {
 			sign = '-';
-			num = - (signed long long) num;
+			num = -(signed long long)num;
 			spec.field_width--;
 		} else if (spec.flags & PLUS) {
 			sign = '+';
@@ -475,7 +466,9 @@ static char *number(char *buf, char *end, unsigned long long num,
 	else if (spec.base != 10) { /* 8 or 16 */
 		int mask = spec.base - 1;
 		int shift = 3;
-		if (spec.base == 16) shift = 4;
+
+		if (spec.base == 16)
+			shift = 4;
 		do {
 			tmp[i++] = (digits[((unsigned char)num) & mask] | locase);
 			num >>= shift;
@@ -490,7 +483,7 @@ static char *number(char *buf, char *end, unsigned long long num,
 	/* leading space padding */
 	spec.field_width -= spec.precision;
 	if (!(spec.flags & (ZEROPAD+LEFT))) {
-		while(--spec.field_width >= 0) {
+		while (--spec.field_width >= 0) {
 			if (buf < end)
 				*buf = ' ';
 			++buf;
@@ -540,15 +533,16 @@ static char *number(char *buf, char *end, unsigned long long num,
 			*buf = ' ';
 		++buf;
 	}
+
 	return buf;
 }
 
-static char *string(char *buf, char *end, char *s, struct printf_spec spec)
+static char *string(char *buf, char *end, const char *s, struct printf_spec spec)
 {
 	int len, i;
 
 	if ((unsigned long)s < PAGE_SIZE)
-		s = "<NULL>";
+		s = "(null)";
 
 	len = strnlen(s, spec.precision);
 
@@ -569,120 +563,370 @@ static char *string(char *buf, char *end, char *s, struct printf_spec spec)
 			*buf = ' ';
 		++buf;
 	}
+
 	return buf;
 }
 
 static char *symbol_string(char *buf, char *end, void *ptr,
-				struct printf_spec spec)
+				struct printf_spec spec, char ext)
 {
 	unsigned long value = (unsigned long) ptr;
 #ifdef CONFIG_KALLSYMS
 	char sym[KSYM_SYMBOL_LEN];
-	sprint_symbol(sym, value);
+	if (ext != 'f' && ext != 's')
+		sprint_symbol(sym, value);
+	else
+		kallsyms_lookup(value, NULL, NULL, NULL, sym);
+
 	return string(buf, end, sym, spec);
 #else
-	spec.field_width = 2*sizeof(void *);
+	spec.field_width = 2 * sizeof(void *);
 	spec.flags |= SPECIAL | SMALL | ZEROPAD;
 	spec.base = 16;
+
 	return number(buf, end, value, spec);
 #endif
 }
 
 static char *resource_string(char *buf, char *end, struct resource *res,
-				struct printf_spec spec)
+				struct printf_spec spec, const char *fmt)
 {
 #ifndef IO_RSRC_PRINTK_SIZE
-#define IO_RSRC_PRINTK_SIZE	4
+#define IO_RSRC_PRINTK_SIZE	6
 #endif
 
 #ifndef MEM_RSRC_PRINTK_SIZE
-#define MEM_RSRC_PRINTK_SIZE	8
+#define MEM_RSRC_PRINTK_SIZE	10
 #endif
-	struct printf_spec num_spec = {
+	static const struct printf_spec io_spec = {
 		.base = 16,
+		.field_width = IO_RSRC_PRINTK_SIZE,
 		.precision = -1,
 		.flags = SPECIAL | SMALL | ZEROPAD,
 	};
-	/* room for the actual numbers, the two "0x", -, [, ] and the final zero */
-	char sym[4*sizeof(resource_size_t) + 8];
-	char *p = sym, *pend = sym + sizeof(sym);
-	int size = -1;
+	static const struct printf_spec mem_spec = {
+		.base = 16,
+		.field_width = MEM_RSRC_PRINTK_SIZE,
+		.precision = -1,
+		.flags = SPECIAL | SMALL | ZEROPAD,
+	};
+	static const struct printf_spec bus_spec = {
+		.base = 16,
+		.field_width = 2,
+		.precision = -1,
+		.flags = SMALL | ZEROPAD,
+	};
+	static const struct printf_spec dec_spec = {
+		.base = 10,
+		.precision = -1,
+		.flags = 0,
+	};
+	static const struct printf_spec str_spec = {
+		.field_width = -1,
+		.precision = 10,
+		.flags = LEFT,
+	};
+	static const struct printf_spec flag_spec = {
+		.base = 16,
+		.precision = -1,
+		.flags = SPECIAL | SMALL,
+	};
+
+	/* 32-bit res (sizeof==4): 10 chars in dec, 10 in hex ("0x" + 8)
+	 * 64-bit res (sizeof==8): 20 chars in dec, 18 in hex ("0x" + 16) */
+#define RSRC_BUF_SIZE		((2 * sizeof(resource_size_t)) + 4)
+#define FLAG_BUF_SIZE		(2 * sizeof(res->flags))
+#define DECODED_BUF_SIZE	sizeof("[mem - 64bit pref window disabled]")
+#define RAW_BUF_SIZE		sizeof("[mem - flags 0x]")
+	char sym[max(2*RSRC_BUF_SIZE + DECODED_BUF_SIZE,
+		     2*RSRC_BUF_SIZE + FLAG_BUF_SIZE + RAW_BUF_SIZE)];
 
-	if (res->flags & IORESOURCE_IO)
-		size = IO_RSRC_PRINTK_SIZE;
-	else if (res->flags & IORESOURCE_MEM)
-		size = MEM_RSRC_PRINTK_SIZE;
+	char *p = sym, *pend = sym + sizeof(sym);
+	int decode = (fmt[0] == 'R') ? 1 : 0;
+	const struct printf_spec *specp;
 
 	*p++ = '[';
-	num_spec.field_width = size;
-	p = number(p, pend, res->start, num_spec);
-	*p++ = '-';
-	p = number(p, pend, res->end, num_spec);
+	if (res->flags & IORESOURCE_IO) {
+		p = string(p, pend, "io  ", str_spec);
+		specp = &io_spec;
+	} else if (res->flags & IORESOURCE_MEM) {
+		p = string(p, pend, "mem ", str_spec);
+		specp = &mem_spec;
+	} else if (res->flags & IORESOURCE_IRQ) {
+		p = string(p, pend, "irq ", str_spec);
+		specp = &dec_spec;
+	} else if (res->flags & IORESOURCE_DMA) {
+		p = string(p, pend, "dma ", str_spec);
+		specp = &dec_spec;
+	} else if (res->flags & IORESOURCE_BUS) {
+		p = string(p, pend, "bus ", str_spec);
+		specp = &bus_spec;
+	} else {
+		p = string(p, pend, "??? ", str_spec);
+		specp = &mem_spec;
+		decode = 0;
+	}
+	p = number(p, pend, res->start, *specp);
+	if (res->start != res->end) {
+		*p++ = '-';
+		p = number(p, pend, res->end, *specp);
+	}
+	if (decode) {
+		if (res->flags & IORESOURCE_MEM_64)
+			p = string(p, pend, " 64bit", str_spec);
+		if (res->flags & IORESOURCE_PREFETCH)
+			p = string(p, pend, " pref", str_spec);
+		if (res->flags & IORESOURCE_WINDOW)
+			p = string(p, pend, " window", str_spec);
+		if (res->flags & IORESOURCE_DISABLED)
+			p = string(p, pend, " disabled", str_spec);
+	} else {
+		p = string(p, pend, " flags ", str_spec);
+		p = number(p, pend, res->flags, flag_spec);
+	}
 	*p++ = ']';
-	*p = 0;
+	*p = '\0';
 
 	return string(buf, end, sym, spec);
 }
 
 static char *mac_address_string(char *buf, char *end, u8 *addr,
-				struct printf_spec spec)
+				struct printf_spec spec, const char *fmt)
 {
-	char mac_addr[6 * 3]; /* (6 * 2 hex digits), 5 colons and trailing zero */
+	char mac_addr[sizeof("xx:xx:xx:xx:xx:xx")];
 	char *p = mac_addr;
 	int i;
+	char separator;
+
+	if (fmt[1] == 'F') {		/* FDDI canonical format */
+		separator = '-';
+	} else {
+		separator = ':';
+	}
 
 	for (i = 0; i < 6; i++) {
 		p = pack_hex_byte(p, addr[i]);
-		if (!(spec.flags & SPECIAL) && i != 5)
-			*p++ = ':';
+		if (fmt[0] == 'M' && i != 5)
+			*p++ = separator;
 	}
 	*p = '\0';
-	spec.flags &= ~SPECIAL;
 
 	return string(buf, end, mac_addr, spec);
 }
 
-static char *ip6_addr_string(char *buf, char *end, u8 *addr,
-				struct printf_spec spec)
+static char *ip4_string(char *p, const u8 *addr, const char *fmt)
 {
-	char ip6_addr[8 * 5]; /* (8 * 4 hex digits), 7 colons and trailing zero */
-	char *p = ip6_addr;
 	int i;
+	bool leading_zeros = (fmt[0] == 'i');
+	int index;
+	int step;
+
+	switch (fmt[2]) {
+	case 'h':
+#ifdef __BIG_ENDIAN
+		index = 0;
+		step = 1;
+#else
+		index = 3;
+		step = -1;
+#endif
+		break;
+	case 'l':
+		index = 3;
+		step = -1;
+		break;
+	case 'n':
+	case 'b':
+	default:
+		index = 0;
+		step = 1;
+		break;
+	}
+	for (i = 0; i < 4; i++) {
+		char temp[3];	/* hold each IP quad in reverse order */
+		int digits = put_dec_trunc(temp, addr[index]) - temp;
+		if (leading_zeros) {
+			if (digits < 3)
+				*p++ = '0';
+			if (digits < 2)
+				*p++ = '0';
+		}
+		/* reverse the digits in the quad */
+		while (digits--)
+			*p++ = temp[digits];
+		if (i < 3)
+			*p++ = '.';
+		index += step;
+	}
+	*p = '\0';
 
-	for (i = 0; i < 8; i++) {
-		p = pack_hex_byte(p, addr[2 * i]);
-		p = pack_hex_byte(p, addr[2 * i + 1]);
-		if (!(spec.flags & SPECIAL) && i != 7)
+	return p;
+}
+
+static char *ip6_compressed_string(char *p, const char *addr)
+{
+	int i, j, range;
+	unsigned char zerolength[8];
+	int longest = 1;
+	int colonpos = -1;
+	u16 word;
+	u8 hi, lo;
+	bool needcolon = false;
+	bool useIPv4;
+	struct in6_addr in6;
+
+	memcpy(&in6, addr, sizeof(struct in6_addr));
+
+	useIPv4 = ipv6_addr_v4mapped(&in6) || ipv6_addr_is_isatap(&in6);
+
+	memset(zerolength, 0, sizeof(zerolength));
+
+	if (useIPv4)
+		range = 6;
+	else
+		range = 8;
+
+	/* find position of longest 0 run */
+	for (i = 0; i < range; i++) {
+		for (j = i; j < range; j++) {
+			if (in6.s6_addr16[j] != 0)
+				break;
+			zerolength[i]++;
+		}
+	}
+	for (i = 0; i < range; i++) {
+		if (zerolength[i] > longest) {
+			longest = zerolength[i];
+			colonpos = i;
+		}
+	}
+
+	/* emit address */
+	for (i = 0; i < range; i++) {
+		if (i == colonpos) {
+			if (needcolon || i == 0)
+				*p++ = ':';
+			*p++ = ':';
+			needcolon = false;
+			i += longest - 1;
+			continue;
+		}
+		if (needcolon) {
+			*p++ = ':';
+			needcolon = false;
+		}
+		/* hex u16 without leading 0s */
+		word = ntohs(in6.s6_addr16[i]);
+		hi = word >> 8;
+		lo = word & 0xff;
+		if (hi) {
+			if (hi > 0x0f)
+				p = pack_hex_byte(p, hi);
+			else
+				*p++ = hex_asc_lo(hi);
+			p = pack_hex_byte(p, lo);
+		}
+		else if (lo > 0x0f)
+			p = pack_hex_byte(p, lo);
+		else
+			*p++ = hex_asc_lo(lo);
+		needcolon = true;
+	}
+
+	if (useIPv4) {
+		if (needcolon)
 			*p++ = ':';
+		p = ip4_string(p, &in6.s6_addr[12], "I4");
 	}
 	*p = '\0';
-	spec.flags &= ~SPECIAL;
 
-	return string(buf, end, ip6_addr, spec);
+	return p;
 }
 
-static char *ip4_addr_string(char *buf, char *end, u8 *addr,
-				struct printf_spec spec)
+static char *ip6_string(char *p, const char *addr, const char *fmt)
 {
-	char ip4_addr[4 * 4]; /* (4 * 3 decimal digits), 3 dots and trailing zero */
-	char temp[3];	/* hold each IP quad in reverse order */
-	char *p = ip4_addr;
-	int i, digits;
+	int i;
 
-	for (i = 0; i < 4; i++) {
-		digits = put_dec_trunc(temp, addr[i]) - temp;
-		/* reverse the digits in the quad */
-		while (digits--)
-			*p++ = temp[digits];
-		if (i != 3)
-			*p++ = '.';
+	for (i = 0; i < 8; i++) {
+		p = pack_hex_byte(p, *addr++);
+		p = pack_hex_byte(p, *addr++);
+		if (fmt[0] == 'I' && i != 7)
+			*p++ = ':';
 	}
 	*p = '\0';
-	spec.flags &= ~SPECIAL;
+
+	return p;
+}
+
+static char *ip6_addr_string(char *buf, char *end, const u8 *addr,
+			     struct printf_spec spec, const char *fmt)
+{
+	char ip6_addr[sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255")];
+
+	if (fmt[0] == 'I' && fmt[2] == 'c')
+		ip6_compressed_string(ip6_addr, addr);
+	else
+		ip6_string(ip6_addr, addr, fmt);
+
+	return string(buf, end, ip6_addr, spec);
+}
+
+static char *ip4_addr_string(char *buf, char *end, const u8 *addr,
+			     struct printf_spec spec, const char *fmt)
+{
+	char ip4_addr[sizeof("255.255.255.255")];
+
+	ip4_string(ip4_addr, addr, fmt);
 
 	return string(buf, end, ip4_addr, spec);
 }
 
+static char *uuid_string(char *buf, char *end, const u8 *addr,
+			 struct printf_spec spec, const char *fmt)
+{
+	char uuid[sizeof("xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx")];
+	char *p = uuid;
+	int i;
+	static const u8 be[16] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15};
+	static const u8 le[16] = {3,2,1,0,5,4,7,6,8,9,10,11,12,13,14,15};
+	const u8 *index = be;
+	bool uc = false;
+
+	switch (*(++fmt)) {
+	case 'L':
+		uc = true;		/* fall-through */
+	case 'l':
+		index = le;
+		break;
+	case 'B':
+		uc = true;
+		break;
+	}
+
+	for (i = 0; i < 16; i++) {
+		p = pack_hex_byte(p, addr[index[i]]);
+		switch (i) {
+		case 3:
+		case 5:
+		case 7:
+		case 9:
+			*p++ = '-';
+			break;
+		}
+	}
+
+	*p = 0;
+
+	if (uc) {
+		p = uuid;
+		do {
+			*p = toupper(*p);
+		} while (*(++p));
+	}
+
+	return string(buf, end, uuid, spec);
+}
+
 /*
  * Show a '%p' thing.  A kernel extension is that the '%p' is followed
  * by an extra set of alphanumeric characters that are extended format
@@ -690,16 +934,37 @@ static char *ip4_addr_string(char *buf, char *end, u8 *addr,
  *
  * Right now we handle:
  *
- * - 'F' For symbolic function descriptor pointers
- * - 'S' For symbolic direct pointers
- * - 'R' For a struct resource pointer, it prints the range of
- *       addresses (not the name nor the flags)
+ * - 'F' For symbolic function descriptor pointers with offset
+ * - 'f' For simple symbolic function names without offset
+ * - 'S' For symbolic direct pointers with offset
+ * - 's' For symbolic direct pointers without offset
+ * - 'R' For decoded struct resource, e.g., [mem 0x0-0x1f 64bit pref]
+ * - 'r' For raw struct resource, e.g., [mem 0x0-0x1f flags 0x201]
  * - 'M' For a 6-byte MAC address, it prints the address in the
  *       usual colon-separated hex notation
- * - 'I' [46] for IPv4/IPv6 addresses printed in the usual way (dot-separated
- *       decimal for v4 and colon separated network-order 16 bit hex for v6)
- * - 'i' [46] for 'raw' IPv4/IPv6 addresses, IPv6 omits the colons, IPv4 is
- *       currently the same
+ * - 'm' For a 6-byte MAC address, it prints the hex address without colons
+ * - 'MF' For a 6-byte MAC FDDI address, it prints the address
+ *       with a dash-separated hex notation
+ * - 'I' [46] for IPv4/IPv6 addresses printed in the usual way
+ *       IPv4 uses dot-separated decimal without leading 0's (1.2.3.4)
+ *       IPv6 uses colon separated network-order 16 bit hex with leading 0's
+ * - 'i' [46] for 'raw' IPv4/IPv6 addresses
+ *       IPv6 omits the colons (01020304...0f)
+ *       IPv4 uses dot-separated decimal with leading 0's (010.123.045.006)
+ * - '[Ii]4[hnbl]' IPv4 addresses in host, network, big or little endian order
+ * - 'I6c' for IPv6 addresses printed as specified by
+ *       http://tools.ietf.org/html/draft-ietf-6man-text-addr-representation-00
+ * - 'U' For a 16 byte UUID/GUID, it prints the UUID/GUID in the form
+ *       "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
+ *       Options for %pU are:
+ *         b big endian lower case hex (default)
+ *         B big endian UPPER case hex
+ *         l little endian lower case hex
+ *         L little endian UPPER case hex
+ *           big endian output byte order is:
+ *             [0][1][2][3]-[4][5]-[6][7]-[8][9]-[10][11][12][13][14][15]
+ *           little endian output byte order is:
+ *             [3][2][1][0]-[5][4]-[7][6]-[8][9]-[10][11][12][13][14][15]
  *
  * Note: The difference between 'S' and 'F' is that on ia64 and ppc64
  * function pointers are really function descriptors, which contain a
@@ -713,27 +978,37 @@ static char *pointer(const char *fmt, char *buf, char *end, void *ptr,
 
 	switch (*fmt) {
 	case 'F':
+	case 'f':
 		ptr = dereference_function_descriptor(ptr);
 		/* Fallthrough */
 	case 'S':
-		return symbol_string(buf, end, ptr, spec);
+	case 's':
+		return symbol_string(buf, end, ptr, spec, *fmt);
 	case 'R':
-		return resource_string(buf, end, ptr, spec);
-	case 'm':
-		spec.flags |= SPECIAL;
-		/* Fallthrough */
-	case 'M':
-		return mac_address_string(buf, end, ptr, spec);
-	case 'i':
-		spec.flags |= SPECIAL;
-		/* Fallthrough */
-	case 'I':
-		if (fmt[1] == '6')
-			return ip6_addr_string(buf, end, ptr, spec);
-		if (fmt[1] == '4')
-			return ip4_addr_string(buf, end, ptr, spec);
-		spec.flags &= ~SPECIAL;
+	case 'r':
+		return resource_string(buf, end, ptr, spec, fmt);
+	case 'M':			/* Colon separated: 00:01:02:03:04:05 */
+	case 'm':			/* Contiguous: 000102030405 */
+					/* [mM]F (FDDI, bit reversed) */
+		return mac_address_string(buf, end, ptr, spec, fmt);
+	case 'I':			/* Formatted IP supported
+					 * 4:	1.2.3.4
+					 * 6:	0001:0203:...:0708
+					 * 6c:	1::708 or 1::1.2.3.4
+					 */
+	case 'i':			/* Contiguous:
+					 * 4:	001.002.003.004
+					 * 6:   000102...0f
+					 */
+		switch (fmt[1]) {
+		case '6':
+			return ip6_addr_string(buf, end, ptr, spec, fmt);
+		case '4':
+			return ip4_addr_string(buf, end, ptr, spec, fmt);
+		}
 		break;
+	case 'U':
+		return uuid_string(buf, end, ptr, spec, fmt);
 	}
 	spec.flags |= SMALL;
 	if (spec.field_width == -1) {
@@ -851,13 +1126,17 @@ precision:
 qualifier:
 	/* get the conversion qualifier */
 	spec->qualifier = -1;
-	if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L' ||
-	    *fmt == 'Z' || *fmt == 'z' || *fmt == 't') {
-		spec->qualifier = *fmt;
-		++fmt;
-		if (spec->qualifier == 'l' && *fmt == 'l') {
-			spec->qualifier = 'L';
-			++fmt;
+	if (*fmt == 'h' || TOLOWER(*fmt) == 'l' ||
+	    TOLOWER(*fmt) == 'z' || *fmt == 't') {
+		spec->qualifier = *fmt++;
+		if (unlikely(spec->qualifier == *fmt)) {
+			if (spec->qualifier == 'l') {
+				spec->qualifier = 'L';
+				++fmt;
+			} else if (spec->qualifier == 'h') {
+				spec->qualifier = 'H';
+				++fmt;
+			}
 		}
 	}
 
@@ -915,10 +1194,15 @@ qualifier:
 			spec->type = FORMAT_TYPE_LONG;
 		else
 			spec->type = FORMAT_TYPE_ULONG;
-	} else if (spec->qualifier == 'Z' || spec->qualifier == 'z') {
+	} else if (TOLOWER(spec->qualifier) == 'z') {
 		spec->type = FORMAT_TYPE_SIZE_T;
 	} else if (spec->qualifier == 't') {
 		spec->type = FORMAT_TYPE_PTRDIFF;
+	} else if (spec->qualifier == 'H') {
+		if (spec->flags & SIGN)
+			spec->type = FORMAT_TYPE_BYTE;
+		else
+			spec->type = FORMAT_TYPE_UBYTE;
 	} else if (spec->qualifier == 'h') {
 		if (spec->flags & SIGN)
 			spec->type = FORMAT_TYPE_SHORT;
@@ -942,9 +1226,23 @@ qualifier:
  * @args: Arguments for the format string
  *
  * This function follows C99 vsnprintf, but has some extensions:
- * %pS output the name of a text symbol
- * %pF output the name of a function pointer
- * %pR output the address range in a struct resource
+ * %pS output the name of a text symbol with offset
+ * %ps output the name of a text symbol without offset
+ * %pF output the name of a function pointer with its offset
+ * %pf output the name of a function pointer without its offset
+ * %pR output the address range in a struct resource with decoded flags
+ * %pr output the address range in a struct resource with raw flags
+ * %pM output a 6-byte MAC address with colons
+ * %pm output a 6-byte MAC address without colons
+ * %pI4 print an IPv4 address without leading zeros
+ * %pi4 print an IPv4 address with leading zeros
+ * %pI6 print an IPv6 address with colons
+ * %pi6 print an IPv6 address without colons
+ * %pI6c print an IPv6 address as specified by
+ *   http://tools.ietf.org/html/draft-ietf-6man-text-addr-representation-00
+ * %pU[bBlL] print a UUID/GUID in big or little endian using lower or upper
+ *   case.
+ * %n is ignored
  *
  * The return value is the number of characters which would
  * be generated for the given input, excluding the trailing
@@ -960,19 +1258,13 @@ qualifier:
 int vsnprintf(char *buf, size_t size, const char *fmt, va_list args)
 {
 	unsigned long long num;
-	char *str, *end, c;
-	int read;
+	char *str, *end;
 	struct printf_spec spec = {0};
 
 	/* Reject out-of-range values early.  Large positive sizes are
 	   used for unknown buffer sizes. */
-	if (unlikely((int) size < 0)) {
-		/* There can be only one.. */
-		static char warn = 1;
-		WARN_ON(warn);
-		warn = 0;
+	if (WARN_ON_ONCE((int) size < 0))
 		return 0;
-	}
 
 	str = buf;
 	end = buf + size;
@@ -985,8 +1277,7 @@ int vsnprintf(char *buf, size_t size, const char *fmt, va_list args)
 
 	while (*fmt) {
 		const char *old_fmt = fmt;
-
-		read = format_decode(fmt, &spec);
+		int read = format_decode(fmt, &spec);
 
 		fmt += read;
 
@@ -1010,7 +1301,9 @@ int vsnprintf(char *buf, size_t size, const char *fmt, va_list args)
 			spec.precision = va_arg(args, int);
 			break;
 
-		case FORMAT_TYPE_CHAR:
+		case FORMAT_TYPE_CHAR: {
+			char c;
+
 			if (!(spec.flags & LEFT)) {
 				while (--spec.field_width > 0) {
 					if (str < end)
@@ -1029,6 +1322,7 @@ int vsnprintf(char *buf, size_t size, const char *fmt, va_list args)
 				++str;
 			}
 			break;
+		}
 
 		case FORMAT_TYPE_STR:
 			str = string(str, end, va_arg(args, char *), spec);
@@ -1051,23 +1345,15 @@ int vsnprintf(char *buf, size_t size, const char *fmt, va_list args)
 			if (str < end)
 				*str = '%';
 			++str;
-			if (*fmt) {
-				if (str < end)
-					*str = *fmt;
-				++str;
-			} else {
-				--fmt;
-			}
 			break;
 
 		case FORMAT_TYPE_NRCHARS: {
-			int qualifier = spec.qualifier;
+			u8 qualifier = spec.qualifier;
 
 			if (qualifier == 'l') {
 				long *ip = va_arg(args, long *);
 				*ip = (str - buf);
-			} else if (qualifier == 'Z' ||
-					qualifier == 'z') {
+			} else if (TOLOWER(qualifier) == 'z') {
 				size_t *ip = va_arg(args, size_t *);
 				*ip = (str - buf);
 			} else {
@@ -1094,6 +1380,12 @@ int vsnprintf(char *buf, size_t size, const char *fmt, va_list args)
 			case FORMAT_TYPE_PTRDIFF:
 				num = va_arg(args, ptrdiff_t);
 				break;
+			case FORMAT_TYPE_UBYTE:
+				num = (unsigned char) va_arg(args, int);
+				break;
+			case FORMAT_TYPE_BYTE:
+				num = (signed char) va_arg(args, int);
+				break;
 			case FORMAT_TYPE_USHORT:
 				num = (unsigned short) va_arg(args, int);
 				break;
@@ -1144,7 +1436,8 @@ int vscnprintf(char *buf, size_t size, const char *fmt, va_list args)
 {
 	int i;
 
-	i=vsnprintf(buf,size,fmt,args);
+	i = vsnprintf(buf, size, fmt, args);
+
 	return (i >= size) ? (size - 1) : i;
 }
 EXPORT_SYMBOL(vscnprintf);
@@ -1163,14 +1456,15 @@ EXPORT_SYMBOL(vscnprintf);
  *
  * See the vsnprintf() documentation for format string extensions over C99.
  */
-int snprintf(char * buf, size_t size, const char *fmt, ...)
+int snprintf(char *buf, size_t size, const char *fmt, ...)
 {
 	va_list args;
 	int i;
 
 	va_start(args, fmt);
-	i=vsnprintf(buf,size,fmt,args);
+	i = vsnprintf(buf, size, fmt, args);
 	va_end(args);
+
 	return i;
 }
 EXPORT_SYMBOL(snprintf);
@@ -1186,7 +1480,7 @@ EXPORT_SYMBOL(snprintf);
  * the trailing '\0'. If @size is <= 0 the function returns 0.
  */
 
-int scnprintf(char * buf, size_t size, const char *fmt, ...)
+int scnprintf(char *buf, size_t size, const char *fmt, ...)
 {
 	va_list args;
 	int i;
@@ -1194,6 +1488,7 @@ int scnprintf(char * buf, size_t size, const char *fmt, ...)
 	va_start(args, fmt);
 	i = vsnprintf(buf, size, fmt, args);
 	va_end(args);
+
 	return (i >= size) ? (size - 1) : i;
 }
 EXPORT_SYMBOL(scnprintf);
@@ -1231,14 +1526,15 @@ EXPORT_SYMBOL(vsprintf);
  *
  * See the vsnprintf() documentation for format string extensions over C99.
  */
-int sprintf(char * buf, const char *fmt, ...)
+int sprintf(char *buf, const char *fmt, ...)
 {
 	va_list args;
 	int i;
 
 	va_start(args, fmt);
-	i=vsnprintf(buf, INT_MAX, fmt, args);
+	i = vsnprintf(buf, INT_MAX, fmt, args);
 	va_end(args);
+
 	return i;
 }
 EXPORT_SYMBOL(sprintf);
@@ -1271,7 +1567,6 @@ int vbin_printf(u32 *bin_buf, size_t size, const char *fmt, va_list args)
 {
 	struct printf_spec spec = {0};
 	char *str, *end;
-	int read;
 
 	str = (char *)bin_buf;
 	end = (char *)(bin_buf + size);
@@ -1296,14 +1591,15 @@ do {									\
 	str += sizeof(type);						\
 } while (0)
 
-
 	while (*fmt) {
-		read = format_decode(fmt, &spec);
+		int read = format_decode(fmt, &spec);
 
 		fmt += read;
 
 		switch (spec.type) {
 		case FORMAT_TYPE_NONE:
+		case FORMAT_TYPE_INVALID:
+		case FORMAT_TYPE_PERCENT_CHAR:
 			break;
 
 		case FORMAT_TYPE_WIDTH:
@@ -1318,13 +1614,14 @@ do {									\
 		case FORMAT_TYPE_STR: {
 			const char *save_str = va_arg(args, char *);
 			size_t len;
+
 			if ((unsigned long)save_str > (unsigned long)-PAGE_SIZE
 					|| (unsigned long)save_str < PAGE_SIZE)
-				save_str = "<NULL>";
-			len = strlen(save_str);
-			if (str + len + 1 < end)
-				memcpy(str, save_str, len + 1);
-			str += len + 1;
+				save_str = "(null)";
+			len = strlen(save_str) + 1;
+			if (str + len < end)
+				memcpy(str, save_str, len);
+			str += len;
 			break;
 		}
 
@@ -1335,21 +1632,13 @@ do {									\
 				fmt++;
 			break;
 
-		case FORMAT_TYPE_PERCENT_CHAR:
-			break;
-
-		case FORMAT_TYPE_INVALID:
-			if (!*fmt)
-				--fmt;
-			break;
-
 		case FORMAT_TYPE_NRCHARS: {
 			/* skip %n 's argument */
-			int qualifier = spec.qualifier;
+			u8 qualifier = spec.qualifier;
 			void *skip_arg;
 			if (qualifier == 'l')
 				skip_arg = va_arg(args, long *);
-			else if (qualifier == 'Z' || qualifier == 'z')
+			else if (TOLOWER(qualifier) == 'z')
 				skip_arg = va_arg(args, size_t *);
 			else
 				skip_arg = va_arg(args, int *);
@@ -1372,6 +1661,10 @@ do {									\
 			case FORMAT_TYPE_PTRDIFF:
 				save_arg(ptrdiff_t);
 				break;
+			case FORMAT_TYPE_UBYTE:
+			case FORMAT_TYPE_BYTE:
+				save_arg(char);
+				break;
 			case FORMAT_TYPE_USHORT:
 			case FORMAT_TYPE_SHORT:
 				save_arg(short);
@@ -1381,8 +1674,8 @@ do {									\
 			}
 		}
 	}
-	return (u32 *)(PTR_ALIGN(str, sizeof(u32))) - bin_buf;
 
+	return (u32 *)(PTR_ALIGN(str, sizeof(u32))) - bin_buf;
 #undef save_arg
 }
 EXPORT_SYMBOL_GPL(vbin_printf);
@@ -1399,10 +1692,7 @@ EXPORT_SYMBOL_GPL(vbin_printf);
  * a binary buffer that generated by vbin_printf.
  *
  * The format follows C99 vsnprintf, but has some extensions:
- * %pS output the name of a text symbol
- * %pF output the name of a function pointer
- * %pR output the address range in a struct resource
- * %n is ignored
+ *  see vsnprintf comment for details.
  *
  * The return value is the number of characters which would
  * be generated for the given input, excluding the trailing
@@ -1414,19 +1704,12 @@ EXPORT_SYMBOL_GPL(vbin_printf);
  */
 int bstr_printf(char *buf, size_t size, const char *fmt, const u32 *bin_buf)
 {
-	unsigned long long num;
-	char *str, *end, c;
-	const char *args = (const char *)bin_buf;
-
 	struct printf_spec spec = {0};
+	char *str, *end;
+	const char *args = (const char *)bin_buf;
 
-	if (unlikely((int) size < 0)) {
-		/* There can be only one.. */
-		static char warn = 1;
-		WARN_ON(warn);
-		warn = 0;
+	if (WARN_ON_ONCE((int) size < 0))
 		return 0;
-	}
 
 	str = buf;
 	end = buf + size;
@@ -1453,10 +1736,8 @@ int bstr_printf(char *buf, size_t size, const char *fmt, const u32 *bin_buf)
 	}
 
 	while (*fmt) {
-		int read;
 		const char *old_fmt = fmt;
-
-		read = format_decode(fmt, &spec);
+		int read = format_decode(fmt, &spec);
 
 		fmt += read;
 
@@ -1480,7 +1761,9 @@ int bstr_printf(char *buf, size_t size, const char *fmt, const u32 *bin_buf)
 			spec.precision = get_arg(int);
 			break;
 
-		case FORMAT_TYPE_CHAR:
+		case FORMAT_TYPE_CHAR: {
+			char c;
+
 			if (!(spec.flags & LEFT)) {
 				while (--spec.field_width > 0) {
 					if (str < end)
@@ -1498,11 +1781,11 @@ int bstr_printf(char *buf, size_t size, const char *fmt, const u32 *bin_buf)
 				++str;
 			}
 			break;
+		}
 
 		case FORMAT_TYPE_STR: {
 			const char *str_arg = args;
-			size_t len = strlen(str_arg);
-			args += len + 1;
+			args += strlen(str_arg) + 1;
 			str = string(str, end, (char *)str_arg, spec);
 			break;
 		}
@@ -1514,37 +1797,25 @@ int bstr_printf(char *buf, size_t size, const char *fmt, const u32 *bin_buf)
 			break;
 
 		case FORMAT_TYPE_PERCENT_CHAR:
-			if (str < end)
-				*str = '%';
-			++str;
-			break;
-
 		case FORMAT_TYPE_INVALID:
 			if (str < end)
 				*str = '%';
 			++str;
-			if (*fmt) {
-				if (str < end)
-					*str = *fmt;
-				++str;
-			} else {
-				--fmt;
-			}
 			break;
 
 		case FORMAT_TYPE_NRCHARS:
 			/* skip */
 			break;
 
-		default:
+		default: {
+			unsigned long long num;
+
 			switch (spec.type) {
 
 			case FORMAT_TYPE_LONG_LONG:
 				num = get_arg(long long);
 				break;
 			case FORMAT_TYPE_ULONG:
-				num = get_arg(unsigned long);
-				break;
 			case FORMAT_TYPE_LONG:
 				num = get_arg(unsigned long);
 				break;
@@ -1554,6 +1825,12 @@ int bstr_printf(char *buf, size_t size, const char *fmt, const u32 *bin_buf)
 			case FORMAT_TYPE_PTRDIFF:
 				num = get_arg(ptrdiff_t);
 				break;
+			case FORMAT_TYPE_UBYTE:
+				num = get_arg(unsigned char);
+				break;
+			case FORMAT_TYPE_BYTE:
+				num = get_arg(signed char);
+				break;
 			case FORMAT_TYPE_USHORT:
 				num = get_arg(unsigned short);
 				break;
@@ -1568,8 +1845,9 @@ int bstr_printf(char *buf, size_t size, const char *fmt, const u32 *bin_buf)
 			}
 
 			str = number(str, end, num, spec);
-		}
-	}
+		} /* default: */
+		} /* switch(spec.type) */
+	} /* while(*fmt) */
 
 	if (size > 0) {
 		if (str < end)
@@ -1603,6 +1881,7 @@ int bprintf(u32 *bin_buf, size_t size, const char *fmt, ...)
 	va_start(args, fmt);
 	ret = vbin_printf(bin_buf, size, fmt, args);
 	va_end(args);
+
 	return ret;
 }
 EXPORT_SYMBOL_GPL(bprintf);
@@ -1615,27 +1894,25 @@ EXPORT_SYMBOL_GPL(bprintf);
  * @fmt:	format of buffer
  * @args:	arguments
  */
-int vsscanf(const char * buf, const char * fmt, va_list args)
+int vsscanf(const char *buf, const char *fmt, va_list args)
 {
 	const char *str = buf;
 	char *next;
 	char digit;
 	int num = 0;
-	int qualifier;
-	int base;
-	int field_width;
-	int is_sign = 0;
+	u8 qualifier;
+	u8 base;
+	s16 field_width;
+	bool is_sign;
 
-	while(*fmt && *str) {
+	while (*fmt && *str) {
 		/* skip any white space in format */
 		/* white space in format matchs any amount of
 		 * white space, including none, in the input.
 		 */
 		if (isspace(*fmt)) {
-			while (isspace(*fmt))
-				++fmt;
-			while (isspace(*str))
-				++str;
+			fmt = skip_spaces(++fmt);
+			str = skip_spaces(str);
 		}
 
 		/* anything that is not a conversion must match exactly */
@@ -1648,12 +1925,12 @@ int vsscanf(const char * buf, const char * fmt, va_list args)
 		if (!*fmt)
 			break;
 		++fmt;
-		
+
 		/* skip this conversion.
 		 * advance both strings to next white space
 		 */
 		if (*fmt == '*') {
-			while (!isspace(*fmt) && *fmt)
+			while (!isspace(*fmt) && *fmt != '%' && *fmt)
 				fmt++;
 			while (!isspace(*str) && *str)
 				str++;
@@ -1667,8 +1944,8 @@ int vsscanf(const char * buf, const char * fmt, va_list args)
 
 		/* get conversion qualifier */
 		qualifier = -1;
-		if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L' ||
-		    *fmt == 'Z' || *fmt == 'z') {
+		if (*fmt == 'h' || TOLOWER(*fmt) == 'l' ||
+		    TOLOWER(*fmt) == 'z') {
 			qualifier = *fmt++;
 			if (unlikely(qualifier == *fmt)) {
 				if (qualifier == 'h') {
@@ -1680,16 +1957,17 @@ int vsscanf(const char * buf, const char * fmt, va_list args)
 				}
 			}
 		}
-		base = 10;
-		is_sign = 0;
 
 		if (!*fmt || !*str)
 			break;
 
-		switch(*fmt++) {
+		base = 10;
+		is_sign = 0;
+
+		switch (*fmt++) {
 		case 'c':
 		{
-			char *s = (char *) va_arg(args,char*);
+			char *s = (char *)va_arg(args, char*);
 			if (field_width == -1)
 				field_width = 1;
 			do {
@@ -1700,17 +1978,15 @@ int vsscanf(const char * buf, const char * fmt, va_list args)
 		continue;
 		case 's':
 		{
-			char *s = (char *) va_arg(args, char *);
-			if(field_width == -1)
-				field_width = INT_MAX;
+			char *s = (char *)va_arg(args, char *);
+			if (field_width == -1)
+				field_width = SHORT_MAX;
 			/* first, skip leading white space in buffer */
-			while (isspace(*str))
-				str++;
+			str = skip_spaces(str);
 
 			/* now copy until next white space */
-			while (*str && !isspace(*str) && field_width--) {
+			while (*str && !isspace(*str) && field_width--)
 				*s++ = *str++;
-			}
 			*s = '\0';
 			num++;
 		}
@@ -1718,7 +1994,7 @@ int vsscanf(const char * buf, const char * fmt, va_list args)
 		case 'n':
 			/* return number of characters read so far */
 		{
-			int *i = (int *)va_arg(args,int*);
+			int *i = (int *)va_arg(args, int*);
 			*i = str - buf;
 		}
 		continue;
@@ -1730,14 +2006,14 @@ int vsscanf(const char * buf, const char * fmt, va_list args)
 			base = 16;
 			break;
 		case 'i':
-                        base = 0;
+			base = 0;
 		case 'd':
 			is_sign = 1;
 		case 'u':
 			break;
 		case '%':
 			/* looking for '%' in str */
-			if (*str++ != '%') 
+			if (*str++ != '%')
 				return num;
 			continue;
 		default:
@@ -1748,71 +2024,70 @@ int vsscanf(const char * buf, const char * fmt, va_list args)
 		/* have some sort of integer conversion.
 		 * first, skip white space in buffer.
 		 */
-		while (isspace(*str))
-			str++;
+		str = skip_spaces(str);
 
 		digit = *str;
 		if (is_sign && digit == '-')
 			digit = *(str + 1);
 
 		if (!digit
-                    || (base == 16 && !isxdigit(digit))
-                    || (base == 10 && !isdigit(digit))
-                    || (base == 8 && (!isdigit(digit) || digit > '7'))
-                    || (base == 0 && !isdigit(digit)))
-				break;
+		    || (base == 16 && !isxdigit(digit))
+		    || (base == 10 && !isdigit(digit))
+		    || (base == 8 && (!isdigit(digit) || digit > '7'))
+		    || (base == 0 && !isdigit(digit)))
+			break;
 
-		switch(qualifier) {
+		switch (qualifier) {
 		case 'H':	/* that's 'hh' in format */
 			if (is_sign) {
-				signed char *s = (signed char *) va_arg(args,signed char *);
-				*s = (signed char) simple_strtol(str,&next,base);
+				signed char *s = (signed char *)va_arg(args, signed char *);
+				*s = (signed char)simple_strtol(str, &next, base);
 			} else {
-				unsigned char *s = (unsigned char *) va_arg(args, unsigned char *);
-				*s = (unsigned char) simple_strtoul(str, &next, base);
+				unsigned char *s = (unsigned char *)va_arg(args, unsigned char *);
+				*s = (unsigned char)simple_strtoul(str, &next, base);
 			}
 			break;
 		case 'h':
 			if (is_sign) {
-				short *s = (short *) va_arg(args,short *);
-				*s = (short) simple_strtol(str,&next,base);
+				short *s = (short *)va_arg(args, short *);
+				*s = (short)simple_strtol(str, &next, base);
 			} else {
-				unsigned short *s = (unsigned short *) va_arg(args, unsigned short *);
-				*s = (unsigned short) simple_strtoul(str, &next, base);
+				unsigned short *s = (unsigned short *)va_arg(args, unsigned short *);
+				*s = (unsigned short)simple_strtoul(str, &next, base);
 			}
 			break;
 		case 'l':
 			if (is_sign) {
-				long *l = (long *) va_arg(args,long *);
-				*l = simple_strtol(str,&next,base);
+				long *l = (long *)va_arg(args, long *);
+				*l = simple_strtol(str, &next, base);
 			} else {
-				unsigned long *l = (unsigned long*) va_arg(args,unsigned long*);
-				*l = simple_strtoul(str,&next,base);
+				unsigned long *l = (unsigned long *)va_arg(args, unsigned long *);
+				*l = simple_strtoul(str, &next, base);
 			}
 			break;
 		case 'L':
 			if (is_sign) {
-				long long *l = (long long*) va_arg(args,long long *);
-				*l = simple_strtoll(str,&next,base);
+				long long *l = (long long *)va_arg(args, long long *);
+				*l = simple_strtoll(str, &next, base);
 			} else {
-				unsigned long long *l = (unsigned long long*) va_arg(args,unsigned long long*);
-				*l = simple_strtoull(str,&next,base);
+				unsigned long long *l = (unsigned long long *)va_arg(args, unsigned long long *);
+				*l = simple_strtoull(str, &next, base);
 			}
 			break;
 		case 'Z':
 		case 'z':
 		{
-			size_t *s = (size_t*) va_arg(args,size_t*);
-			*s = (size_t) simple_strtoul(str,&next,base);
+			size_t *s = (size_t *)va_arg(args, size_t *);
+			*s = (size_t)simple_strtoul(str, &next, base);
 		}
 		break;
 		default:
 			if (is_sign) {
-				int *i = (int *) va_arg(args, int*);
-				*i = (int) simple_strtol(str,&next,base);
+				int *i = (int *)va_arg(args, int *);
+				*i = (int)simple_strtol(str, &next, base);
 			} else {
-				unsigned int *i = (unsigned int*) va_arg(args, unsigned int*);
-				*i = (unsigned int) simple_strtoul(str,&next,base);
+				unsigned int *i = (unsigned int *)va_arg(args, unsigned int*);
+				*i = (unsigned int)simple_strtoul(str, &next, base);
 			}
 			break;
 		}
@@ -1843,14 +2118,15 @@ EXPORT_SYMBOL(vsscanf);
  * @fmt:	formatting of buffer
  * @...:	resulting arguments
  */
-int sscanf(const char * buf, const char * fmt, ...)
+int sscanf(const char *buf, const char *fmt, ...)
 {
 	va_list args;
 	int i;
 
-	va_start(args,fmt);
-	i = vsscanf(buf,fmt,args);
+	va_start(args, fmt);
+	i = vsscanf(buf, fmt, args);
 	va_end(args);
+
 	return i;
 }
 EXPORT_SYMBOL(sscanf);