lib: make _tolower() public

This function is required by *printf and kstrto* functions that are
located in the different modules.  This patch makes _tolower() public.
However, it's good idea to not use the helper outside of mentioned
functions.

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/include/linux/ctype.h b/include/linux/ctype.h
index a3d6ee0..8acfe31 100644 (file)
--- a/include/linux/ctype.h
+++ b/include/linux/ctype.h
@@ -52,4 +52,13 @@ static inline unsigned char __toupper(unsigned char c)
 #define tolower(c) __tolower(c)
 #define toupper(c) __toupper(c)
 
+/*
+ * Fast implementation of tolower() for internal usage. Do not use in your
+ * code.
+ */
+static inline char _tolower(const char c)
+{
+       return c | 0x20;
+}
+
 #endif

diff --git a/lib/kstrtox.c b/lib/kstrtox.c
index 2dbae88..5e06675 100644 (file)
--- a/lib/kstrtox.c
+++ b/lib/kstrtox.c
@@ -19,11 +19,6 @@
 #include <linux/types.h>
 #include <asm/uaccess.h>
 
-static inline char _tolower(const char c)
-{
-       return c | 0x20;
-}
-
 static int _kstrtoull(const char *s, unsigned int base, unsigned long long *res)
 {
        unsigned long long acc;

diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index 4365df3..39e3e8f 100644 (file)
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -31,13 +31,10 @@
 #include <asm/div64.h>
 #include <asm/sections.h>      /* for dereference_function_descriptor() */
 
-/* Works only for digits and letters, but small and fast */
-#define TOLOWER(x) ((x) | 0x20)
-
 static unsigned int simple_guess_base(const char *cp)
 {
        if (cp[0] == '0') {
-               if (TOLOWER(cp[1]) == 'x' && isxdigit(cp[2]))
+               if (_tolower(cp[1]) == 'x' && isxdigit(cp[2]))
                        return 16;
                else
                        return 8;
@@ -59,13 +56,13 @@ unsigned long long simple_strtoull(const char *cp, char **endp, unsigned int bas
        if (!base)
                base = simple_guess_base(cp);
 
-       if (base == 16 && cp[0] == '0' && TOLOWER(cp[1]) == 'x')
+       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;
+               value = isdigit(*cp) ? *cp - '0' : _tolower(*cp) - 'a' + 10;
                if (value >= base)
                        break;
                result = result * base + value;
@@ -1036,8 +1033,8 @@ precision:
 qualifier:
        /* get the conversion qualifier */
        spec->qualifier = -1;
-       if (*fmt == 'h' || TOLOWER(*fmt) == 'l' ||
-           TOLOWER(*fmt) == 'z' || *fmt == 't') {
+       if (*fmt == 'h' || _tolower(*fmt) == 'l' ||
+           _tolower(*fmt) == 'z' || *fmt == 't') {
                spec->qualifier = *fmt++;
                if (unlikely(spec->qualifier == *fmt)) {
                        if (spec->qualifier == 'l') {
@@ -1104,7 +1101,7 @@ qualifier:
                        spec->type = FORMAT_TYPE_LONG;
                else
                        spec->type = FORMAT_TYPE_ULONG;
-       } else if (TOLOWER(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;
@@ -1263,7 +1260,7 @@ int vsnprintf(char *buf, size_t size, const char *fmt, va_list args)
                        if (qualifier == 'l') {
                                long *ip = va_arg(args, long *);
                                *ip = (str - buf);
-                       } else if (TOLOWER(qualifier) == 'z') {
+                       } else if (_tolower(qualifier) == 'z') {
                                size_t *ip = va_arg(args, size_t *);
                                *ip = (str - buf);
                        } else {
@@ -1550,7 +1547,7 @@ do {                                                                      \
                        void *skip_arg;
                        if (qualifier == 'l')
                                skip_arg = va_arg(args, long *);
-                       else if (TOLOWER(qualifier) == 'z')
+                       else if (_tolower(qualifier) == 'z')
                                skip_arg = va_arg(args, size_t *);
                        else
                                skip_arg = va_arg(args, int *);
@@ -1856,8 +1853,8 @@ int vsscanf(const char *buf, const char *fmt, va_list args)
 
                /* get conversion qualifier */
                qualifier = -1;
-               if (*fmt == 'h' || TOLOWER(*fmt) == 'l' ||
-                   TOLOWER(*fmt) == 'z') {
+               if (*fmt == 'h' || _tolower(*fmt) == 'l' ||
+                   _tolower(*fmt) == 'z') {
                        qualifier = *fmt++;
                        if (unlikely(qualifier == *fmt)) {
                                if (qualifier == 'h') {