1 files changed, 50 insertions, 243 deletions

diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 2b0a35e6bc69..b6de9a6f7018 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -17,13 +17,11 @@
 #include <linux/bitops.h>
 #include <linux/log2.h>
 #include <linux/typecheck.h>
+#include <linux/printk.h>
 #include <linux/dynamic_debug.h>
 #include <asm/byteorder.h>
 #include <asm/bug.h>
 
-extern const char linux_banner[];
-extern const char linux_proc_banner[];
-
 #define USHRT_MAX       ((u16)(~0U))
 #define SHRT_MAX        ((s16)(USHRT_MAX>>1))
 #define SHRT_MIN        ((s16)(-SHRT_MAX - 1))
@@ -58,7 +56,18 @@ extern const char linux_proc_banner[];
 
 #define FIELD_SIZEOF(t, f) (sizeof(((t*)0)->f))
 #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
-#define roundup(x, y) ((((x) + ((y) - 1)) / (y)) * (y))
+#define roundup(x, y) (                                 \
+{                                                       \
+        const typeof(y) __y = y;                        \
+        (((x) + (__y - 1)) / __y) * __y;                \
+}                                                       \
+)
+#define rounddown(x, y) (                               \
+{                                                       \
+        typeof(x) __x = (x);                            \
+        __x - (__x % (y));                              \
+}                                                       \
+)
 #define DIV_ROUND_CLOSEST(x, divisor)(                  \
 {                                                       \
         typeof(divisor) __divisor = divisor;            \
@@ -99,31 +108,6 @@ extern const char linux_proc_banner[];
  */
 #define lower_32_bits(n) ((u32)(n))
 
-#define KERN_EMERG      "<0>"   /* system is unusable                   */
-#define KERN_ALERT      "<1>"   /* action must be taken immediately     */
-#define KERN_CRIT       "<2>"   /* critical conditions                  */
-#define KERN_ERR        "<3>"   /* error conditions                     */
-#define KERN_WARNING    "<4>"   /* warning conditions                   */
-#define KERN_NOTICE     "<5>"   /* normal but significant condition     */
-#define KERN_INFO       "<6>"   /* informational                        */
-#define KERN_DEBUG      "<7>"   /* debug-level messages                 */
-
-/* Use the default kernel loglevel */
-#define KERN_DEFAULT    "<d>"
-/*
- * Annotation for a "continued" line of log printout (only done after a
- * line that had no enclosing \n). Only to be used by core/arch code
- * during early bootup (a continued line is not SMP-safe otherwise).
- */
-#define KERN_CONT       "<c>"
-
-extern int console_printk[];
-
-#define console_loglevel (console_printk[0])
-#define default_message_loglevel (console_printk[1])
-#define minimum_console_loglevel (console_printk[2])
-#define default_console_loglevel (console_printk[3])
-
 struct completion;
 struct pt_regs;
 struct user;
@@ -162,6 +146,11 @@ 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
@@ -171,11 +160,6 @@ static inline void might_fault(void)
 }
 #endif
 
-struct va_format {
-        const char *fmt;
-        va_list *va;
-};
-
 extern struct atomic_notifier_head panic_notifier_list;
 extern long (*panic_blink)(int state);
 NORET_TYPE void panic(const char * fmt, ...)
@@ -192,10 +176,10 @@ 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)
@@ -229,109 +213,8 @@ extern int func_ptr_is_kernel_text(void *ptr);
 struct pid;
 extern struct pid *session_of_pgrp(struct pid *pgrp);
 
-/*
- * FW_BUG
- * Add this to a message where you are sure the firmware is buggy or behaves
- * really stupid or out of spec. Be aware that the responsible BIOS developer
- * should be able to fix this issue or at least get a concrete idea of the
- * problem by reading your message without the need of looking at the kernel
- * code.
- * 
- * Use it for definite and high priority BIOS bugs.
- *
- * FW_WARN
- * Use it for not that clear (e.g. could the kernel messed up things already?)
- * and medium priority BIOS bugs.
- *
- * FW_INFO
- * Use this one if you want to tell the user or vendor about something
- * suspicious, but generally harmless related to the firmware.
- *
- * Use it for information or very low priority BIOS bugs.
- */
-#define FW_BUG          "[Firmware Bug]: "
-#define FW_WARN         "[Firmware Warn]: "
-#define FW_INFO         "[Firmware Info]: "
-
-/*
- * HW_ERR
- * Add this to a message for hardware errors, so that user can report
- * it to hardware vendor instead of LKML or software vendor.
- */
-#define HW_ERR          "[Hardware Error]: "
-
-#ifdef CONFIG_PRINTK
-asmlinkage int vprintk(const char *fmt, va_list args)
-        __attribute__ ((format (printf, 1, 0)));
-asmlinkage int printk(const char * fmt, ...)
-        __attribute__ ((format (printf, 1, 2))) __cold;
-
-extern int __printk_ratelimit(const char *func);
-#define printk_ratelimit() __printk_ratelimit(__func__)
-extern bool printk_timed_ratelimit(unsigned long *caller_jiffies,
-                                   unsigned int interval_msec);
-
-extern int printk_delay_msec;
-
-/*
- * Print a one-time message (analogous to WARN_ONCE() et al):
- */
-#define printk_once(x...) ({                    \
-        static bool __print_once;               \
-                                                \
-        if (!__print_once) {                    \
-                __print_once = true;            \
-                printk(x);                      \
-        }                                       \
-})
-
-void log_buf_kexec_setup(void);
-#else
-static inline int vprintk(const char *s, va_list args)
-        __attribute__ ((format (printf, 1, 0)));
-static inline int vprintk(const char *s, va_list args) { return 0; }
-static inline int printk(const char *s, ...)
-        __attribute__ ((format (printf, 1, 2)));
-static inline int __cold printk(const char *s, ...) { return 0; }
-static inline int printk_ratelimit(void) { return 0; }
-static inline bool printk_timed_ratelimit(unsigned long *caller_jiffies, \
-                                          unsigned int interval_msec)   \
-                { return false; }
-
-/* No effect, but we still get type checking even in the !PRINTK case: */
-#define printk_once(x...) printk(x)
-
-static inline void log_buf_kexec_setup(void)
-{
-}
-#endif
-
-/*
- * Dummy printk for disabled debugging statements to use whilst maintaining
- * gcc's format and side-effect checking.
- */
-static inline __attribute__ ((format (printf, 1, 2)))
-int no_printk(const char *s, ...) { return 0; }
-
-extern int printk_needs_cpu(int cpu);
-extern void printk_tick(void);
-
-extern void asmlinkage __attribute__((format(printf, 1, 2)))
-        early_printk(const char *fmt, ...);
-
 unsigned long int_sqrt(unsigned long);
 
-static inline void console_silent(void)
-{
-        console_loglevel = 0;
-}
-
-static inline void console_verbose(void)
-{
-        if (console_loglevel)
-                console_loglevel = 15;
-}
-
 extern void bust_spinlocks(int yes);
 extern void wake_up_klogd(void);
 extern int oops_in_progress;            /* If set, an oops, panic(), BUG() or die() is in progress */
@@ -368,22 +251,6 @@ extern enum system_states {
 #define TAINT_CRAP                      10
 #define TAINT_FIRMWARE_WORKAROUND       11
 
-extern void dump_stack(void) __cold;
-
-enum {
-        DUMP_PREFIX_NONE,
-        DUMP_PREFIX_ADDRESS,
-        DUMP_PREFIX_OFFSET
-};
-extern void hex_dump_to_buffer(const void *buf, size_t len,
-                                int rowsize, int groupsize,
-                                char *linebuf, size_t linebuflen, bool ascii);
-extern void print_hex_dump(const char *level, const char *prefix_str,
-                                int prefix_type, int rowsize, int groupsize,
-                                const void *buf, size_t len, bool ascii);
-extern void print_hex_dump_bytes(const char *prefix_str, int prefix_type,
-                        const void *buf, size_t len);
-
 extern const char hex_asc[];
 #define hex_asc_lo(x)   hex_asc[((x) & 0x0f)]
 #define hex_asc_hi(x)   hex_asc[((x) & 0xf0) >> 4]
@@ -397,94 +264,6 @@ static inline char *pack_hex_byte(char *buf, u8 byte)
 
 extern int hex_to_bin(char ch);
 
-#ifndef pr_fmt
-#define pr_fmt(fmt) fmt
-#endif
-
-#define pr_emerg(fmt, ...) \
-        printk(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__)
-#define pr_alert(fmt, ...) \
-        printk(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__)
-#define pr_crit(fmt, ...) \
-        printk(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__)
-#define pr_err(fmt, ...) \
-        printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
-#define pr_warning(fmt, ...) \
-        printk(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__)
-#define pr_warn pr_warning
-#define pr_notice(fmt, ...) \
-        printk(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__)
-#define pr_info(fmt, ...) \
-        printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
-#define pr_cont(fmt, ...) \
-        printk(KERN_CONT fmt, ##__VA_ARGS__)
-
-/* pr_devel() should produce zero code unless DEBUG is defined */
-#ifdef DEBUG
-#define pr_devel(fmt, ...) \
-        printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
-#else
-#define pr_devel(fmt, ...) \
-        ({ if (0) printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); 0; })
-#endif
-
-/* If you are writing a driver, please use dev_dbg instead */
-#if defined(DEBUG)
-#define pr_debug(fmt, ...) \
-        printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
-#elif defined(CONFIG_DYNAMIC_DEBUG)
-/* dynamic_pr_debug() uses pr_fmt() internally so we don't need it here */
-#define pr_debug(fmt, ...) \
-        dynamic_pr_debug(fmt, ##__VA_ARGS__)
-#else
-#define pr_debug(fmt, ...) \
-        ({ if (0) printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); 0; })
-#endif
-
-/*
- * ratelimited messages with local ratelimit_state,
- * no local ratelimit_state used in the !PRINTK case
- */
-#ifdef CONFIG_PRINTK
-#define printk_ratelimited(fmt, ...)  ({                                \
-        static DEFINE_RATELIMIT_STATE(_rs,                              \
-                                      DEFAULT_RATELIMIT_INTERVAL,       \
-                                      DEFAULT_RATELIMIT_BURST);         \
-                                                                        \
-        if (__ratelimit(&_rs))                                          \
-                printk(fmt, ##__VA_ARGS__);                             \
-})
-#else
-/* No effect, but we still get type checking even in the !PRINTK case: */
-#define printk_ratelimited printk
-#endif
-
-#define pr_emerg_ratelimited(fmt, ...) \
-        printk_ratelimited(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__)
-#define pr_alert_ratelimited(fmt, ...) \
-        printk_ratelimited(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__)
-#define pr_crit_ratelimited(fmt, ...) \
-        printk_ratelimited(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__)
-#define pr_err_ratelimited(fmt, ...) \
-        printk_ratelimited(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
-#define pr_warning_ratelimited(fmt, ...) \
-        printk_ratelimited(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__)
-#define pr_warn_ratelimited pr_warning_ratelimited
-#define pr_notice_ratelimited(fmt, ...) \
-        printk_ratelimited(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__)
-#define pr_info_ratelimited(fmt, ...) \
-        printk_ratelimited(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
-/* no pr_cont_ratelimited, don't do that... */
-/* If you are writing a driver, please use dev_dbg instead */
-#if defined(DEBUG)
-#define pr_debug_ratelimited(fmt, ...) \
-        printk_ratelimited(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
-#else
-#define pr_debug_ratelimited(fmt, ...) \
-        ({ if (0) printk_ratelimited(KERN_DEBUG pr_fmt(fmt), \
-                                     ##__VA_ARGS__); 0; })
-#endif
-
 /*
  * General tracing related utility functions - trace_printk(),
  * tracing_on/tracing_off and tracing_start()/tracing_stop
@@ -640,6 +419,34 @@ 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
+ * @y: value2
+ */
+#define min_not_zero(x, y) ({                   \
+        typeof(x) __x = (x);                    \
+        typeof(y) __y = (y);                    \
+        __x == 0 ? __y : ((__y == 0) ? __x : min(__x, __y)); })
+
 /**
  * clamp - return a value clamped to a given range with strict typechecking
  * @val: current value