kernel: Constify temporary variable in roundup()

[net-next-2.6.git] / include / linux / kernel.h

diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index edef168a04064b61161cff70e9e8d803aa2ed1a4..b526947bdf489f508c6905b2009005b2220a8643 100644 (file)
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -60,7 +60,7 @@ extern const char linux_proc_banner[];
 #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
 #define roundup(x, y) (                                        \
 {                                                      \
-       typeof(y) __y = y;                              \
+       const typeof(y) __y = y;                        \
        (((x) + (__y - 1)) / __y) * __y;                \
 }                                                      \
 )
@@ -173,6 +173,11 @@ extern int _cond_resched(void);
                (__x < 0) ? -__x : __x;         \
        })
 
+#define abs64(x) ({                            \
+               s64 __x = (x);                  \
+               (__x < 0) ? -__x : __x;         \
+       })
+
 #ifdef CONFIG_PROVE_LOCKING
 void might_fault(void);
 #else
@@ -203,10 +208,10 @@ extern unsigned long simple_strtoul(const char *,char **,unsigned int);
 extern long simple_strtol(const char *,char **,unsigned int);
 extern unsigned long long simple_strtoull(const char *,char **,unsigned int);
 extern long long simple_strtoll(const char *,char **,unsigned int);
-extern int strict_strtoul(const char *, unsigned int, unsigned long *);
-extern int strict_strtol(const char *, unsigned int, long *);
-extern int strict_strtoull(const char *, unsigned int, unsigned long long *);
-extern int strict_strtoll(const char *, unsigned int, long long *);
+extern int __must_check strict_strtoul(const char *, unsigned int, unsigned long *);
+extern int __must_check strict_strtol(const char *, unsigned int, long *);
+extern int __must_check strict_strtoull(const char *, unsigned int, unsigned long long *);
+extern int __must_check strict_strtoll(const char *, unsigned int, long long *);
 extern int sprintf(char * buf, const char * fmt, ...)
        __attribute__ ((format (printf, 2, 3)));
 extern int vsprintf(char *buf, const char *, va_list)
@@ -277,6 +282,11 @@ asmlinkage int vprintk(const char *fmt, va_list args)
 asmlinkage int printk(const char * fmt, ...)
        __attribute__ ((format (printf, 1, 2))) __cold;
 
+/*
+ * Please don't use printk_ratelimit(), because it shares ratelimiting state
+ * with all other unrelated printk_ratelimit() callsites.  Instead use
+ * printk_ratelimited() or plain old __ratelimit().
+ */
 extern int __printk_ratelimit(const char *func);
 #define printk_ratelimit() __printk_ratelimit(__func__)
 extern bool printk_timed_ratelimit(unsigned long *caller_jiffies,
@@ -651,6 +661,24 @@ static inline void ftrace_dump(enum ftrace_dump_mode oops_dump_mode) { }
        (void) (&_max1 == &_max2);              \
        _max1 > _max2 ? _max1 : _max2; })
 
+#define min3(x, y, z) ({                       \
+       typeof(x) _min1 = (x);                  \
+       typeof(y) _min2 = (y);                  \
+       typeof(z) _min3 = (z);                  \
+       (void) (&_min1 == &_min2);              \
+       (void) (&_min1 == &_min3);              \
+       _min1 < _min2 ? (_min1 < _min3 ? _min1 : _min3) : \
+               (_min2 < _min3 ? _min2 : _min3); })
+
+#define max3(x, y, z) ({                       \
+       typeof(x) _max1 = (x);                  \
+       typeof(y) _max2 = (y);                  \
+       typeof(z) _max3 = (z);                  \
+       (void) (&_max1 == &_max2);              \
+       (void) (&_max1 == &_max3);              \
+       _max1 > _max2 ? (_max1 > _max3 ? _max1 : _max3) : \
+               (_max2 > _max3 ? _max2 : _max3); })
+
 /**
  * min_not_zero - return the minimum that is _not_ zero, unless both are zero
  * @x: value1