1 files changed, 44 insertions, 29 deletions

diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 2451f1f7a1d9..c566927efcbd 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -1,15 +1,6 @@
 #ifndef _LINUX_KERNEL_H
 #define _LINUX_KERNEL_H
 
-#include <linux/sysinfo.h>
-
-/*
- * 'kernel.h' contains some often-used function prototypes etc
- */
-#define __ALIGN_KERNEL(x, a)            __ALIGN_KERNEL_MASK(x, (typeof(x))(a) - 1)
-#define __ALIGN_KERNEL_MASK(x, mask)    (((x) + (mask)) & ~(mask))
-
-#ifdef __KERNEL__
 
 #include <stdarg.h>
 #include <linux/linkage.h>
@@ -22,6 +13,7 @@
 #include <linux/printk.h>
 #include <linux/dynamic_debug.h>
 #include <asm/byteorder.h>
+#include <uapi/linux/kernel.h>
 
 #define USHRT_MAX       ((u16)(~0U))
 #define SHRT_MAX        ((s16)(USHRT_MAX>>1))
@@ -85,13 +77,15 @@
 
 /*
  * Divide positive or negative dividend by positive divisor and round
- * to closest integer. Result is undefined for negative divisors.
+ * to closest integer. Result is undefined for negative divisors and
+ * for negative dividends if the divisor variable type is unsigned.
  */
 #define DIV_ROUND_CLOSEST(x, divisor)(                  \
 {                                                       \
         typeof(x) __x = x;                              \
         typeof(divisor) __d = divisor;                  \
-        (((typeof(x))-1) > 0 || (__x) > 0) ?            \
+        (((typeof(x))-1) > 0 ||                         \
+         ((typeof(divisor))-1) > 0 || (__x) > 0) ?      \
                 (((__x) + ((__d) / 2)) / (__d)) :       \
                 (((__x) - ((__d) / 2)) / (__d));        \
 }                                                       \
@@ -228,6 +222,23 @@ int __must_check _kstrtol(const char *s, unsigned int base, long *res);
 
 int __must_check kstrtoull(const char *s, unsigned int base, unsigned long long *res);
 int __must_check kstrtoll(const char *s, unsigned int base, long long *res);
+
+/**
+ * kstrtoul - convert a string to an unsigned long
+ * @s: The start of the string. The string must be null-terminated, and may also
+ *  include a single newline before its terminating null. The first character
+ *  may also be a plus sign, but not a minus sign.
+ * @base: The number base to use. The maximum supported base is 16. If base is
+ *  given as 0, then the base of the string is automatically detected with the
+ *  conventional semantics - If it begins with 0x the number will be parsed as a
+ *  hexadecimal (case insensitive), if it otherwise begins with 0, it will be
+ *  parsed as an octal number. Otherwise it will be parsed as a decimal.
+ * @res: Where to write the result of the conversion on success.
+ *
+ * Returns 0 on success, -ERANGE on overflow and -EINVAL on parsing error.
+ * Used as a replacement for the obsolete simple_strtoull. Return code must
+ * be checked.
+*/
 static inline int __must_check kstrtoul(const char *s, unsigned int base, unsigned long *res)
 {
         /*
@@ -241,6 +252,22 @@ static inline int __must_check kstrtoul(const char *s, unsigned int base, unsign
                 return _kstrtoul(s, base, res);
 }
 
+/**
+ * kstrtol - convert a string to a long
+ * @s: The start of the string. The string must be null-terminated, and may also
+ *  include a single newline before its terminating null. The first character
+ *  may also be a plus sign or a minus sign.
+ * @base: The number base to use. The maximum supported base is 16. If base is
+ *  given as 0, then the base of the string is automatically detected with the
+ *  conventional semantics - If it begins with 0x the number will be parsed as a
+ *  hexadecimal (case insensitive), if it otherwise begins with 0, it will be
+ *  parsed as an octal number. Otherwise it will be parsed as a decimal.
+ * @res: Where to write the result of the conversion on success.
+ *
+ * Returns 0 on success, -ERANGE on overflow and -EINVAL on parsing error.
+ * Used as a replacement for the obsolete simple_strtoull. Return code must
+ * be checked.
+ */
 static inline int __must_check kstrtol(const char *s, unsigned int base, long *res)
 {
         /*
@@ -535,9 +562,6 @@ __ftrace_vprintk(unsigned long ip, const char *fmt, va_list ap);
 
 extern void ftrace_dump(enum ftrace_dump_mode oops_dump_mode);
 #else
-static inline __printf(1, 2)
-int trace_printk(const char *fmt, ...);
-
 static inline void tracing_start(void) { }
 static inline void tracing_stop(void) { }
 static inline void ftrace_off_permanent(void) { }
@@ -547,8 +571,8 @@ static inline void tracing_on(void) { }
 static inline void tracing_off(void) { }
 static inline int tracing_is_on(void) { return 0; }
 
-static inline int
-trace_printk(const char *fmt, ...)
+static inline __printf(1, 2)
+int trace_printk(const char *fmt, ...)
 {
         return 0;
 }
@@ -695,18 +719,11 @@ static inline void ftrace_dump(enum ftrace_dump_mode oops_dump_mode) { }
 /* Trap pasters of __FUNCTION__ at compile-time */
 #define __FUNCTION__ (__func__)
 
-/* This helps us to avoid #ifdef CONFIG_NUMA */
-#ifdef CONFIG_NUMA
-#define NUMA_BUILD 1
+/* This helps us to avoid #ifdef CONFIG_SYMBOL_PREFIX */
+#ifdef CONFIG_SYMBOL_PREFIX
+#define SYMBOL_PREFIX CONFIG_SYMBOL_PREFIX
 #else
-#define NUMA_BUILD 0
-#endif
-
-/* This helps us avoid #ifdef CONFIG_COMPACTION */
-#ifdef CONFIG_COMPACTION
-#define COMPACTION_BUILD 1
-#else
-#define COMPACTION_BUILD 0
+#define SYMBOL_PREFIX ""
 #endif
 
 /* Rebuild everything on CONFIG_FTRACE_MCOUNT_RECORD */
@@ -716,6 +733,4 @@ static inline void ftrace_dump(enum ftrace_dump_mode oops_dump_mode) { }
 
 extern int do_sysinfo(struct sysinfo *info);
 
-#endif /* __KERNEL__ */
-
 #endif