c01226c314
User applications frequently hit problems when they try to use the kernel headers directly, rather than the exported headers. This adds an explicit warning for this case, and points to a URL holding an explanation of why this is wrong and what to do about it. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
715 lines
22 KiB
C
715 lines
22 KiB
C
#ifndef _LINUX_KERNEL_H
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#define _LINUX_KERNEL_H
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/*
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* 'kernel.h' contains some often-used function prototypes etc
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*/
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#ifdef __KERNEL__
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#include <stdarg.h>
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#include <linux/linkage.h>
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#include <linux/stddef.h>
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#include <linux/types.h>
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#include <linux/compiler.h>
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#include <linux/bitops.h>
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#include <linux/log2.h>
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#include <linux/typecheck.h>
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#include <linux/ratelimit.h>
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#include <linux/dynamic_debug.h>
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#include <asm/byteorder.h>
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#include <asm/bug.h>
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extern const char linux_banner[];
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extern const char linux_proc_banner[];
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#define USHORT_MAX ((u16)(~0U))
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#define SHORT_MAX ((s16)(USHORT_MAX>>1))
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#define SHORT_MIN (-SHORT_MAX - 1)
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#define INT_MAX ((int)(~0U>>1))
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#define INT_MIN (-INT_MAX - 1)
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#define UINT_MAX (~0U)
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#define LONG_MAX ((long)(~0UL>>1))
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#define LONG_MIN (-LONG_MAX - 1)
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#define ULONG_MAX (~0UL)
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#define LLONG_MAX ((long long)(~0ULL>>1))
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#define LLONG_MIN (-LLONG_MAX - 1)
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#define ULLONG_MAX (~0ULL)
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#define STACK_MAGIC 0xdeadbeef
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#define ALIGN(x,a) __ALIGN_MASK(x,(typeof(x))(a)-1)
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#define __ALIGN_MASK(x,mask) (((x)+(mask))&~(mask))
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#define PTR_ALIGN(p, a) ((typeof(p))ALIGN((unsigned long)(p), (a)))
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#define IS_ALIGNED(x, a) (((x) & ((typeof(x))(a) - 1)) == 0)
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#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))
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#define FIELD_SIZEOF(t, f) (sizeof(((t*)0)->f))
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#define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
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#define roundup(x, y) ((((x) + ((y) - 1)) / (y)) * (y))
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#define DIV_ROUND_CLOSEST(x, divisor)( \
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{ \
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typeof(divisor) __divisor = divisor; \
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(((x) + ((__divisor) / 2)) / (__divisor)); \
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} \
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)
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#define _RET_IP_ (unsigned long)__builtin_return_address(0)
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#define _THIS_IP_ ({ __label__ __here; __here: (unsigned long)&&__here; })
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#ifdef CONFIG_LBDAF
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# include <asm/div64.h>
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# define sector_div(a, b) do_div(a, b)
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#else
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# define sector_div(n, b)( \
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{ \
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int _res; \
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_res = (n) % (b); \
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(n) /= (b); \
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_res; \
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} \
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)
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#endif
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/**
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* upper_32_bits - return bits 32-63 of a number
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* @n: the number we're accessing
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*
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* A basic shift-right of a 64- or 32-bit quantity. Use this to suppress
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* the "right shift count >= width of type" warning when that quantity is
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* 32-bits.
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*/
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#define upper_32_bits(n) ((u32)(((n) >> 16) >> 16))
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/**
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* lower_32_bits - return bits 0-31 of a number
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* @n: the number we're accessing
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*/
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#define lower_32_bits(n) ((u32)(n))
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#define KERN_EMERG "<0>" /* system is unusable */
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#define KERN_ALERT "<1>" /* action must be taken immediately */
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#define KERN_CRIT "<2>" /* critical conditions */
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#define KERN_ERR "<3>" /* error conditions */
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#define KERN_WARNING "<4>" /* warning conditions */
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#define KERN_NOTICE "<5>" /* normal but significant condition */
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#define KERN_INFO "<6>" /* informational */
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#define KERN_DEBUG "<7>" /* debug-level messages */
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/* Use the default kernel loglevel */
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#define KERN_DEFAULT "<d>"
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/*
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* Annotation for a "continued" line of log printout (only done after a
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* line that had no enclosing \n). Only to be used by core/arch code
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* during early bootup (a continued line is not SMP-safe otherwise).
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*/
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#define KERN_CONT "<c>"
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extern int console_printk[];
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#define console_loglevel (console_printk[0])
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#define default_message_loglevel (console_printk[1])
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#define minimum_console_loglevel (console_printk[2])
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#define default_console_loglevel (console_printk[3])
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struct completion;
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struct pt_regs;
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struct user;
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#ifdef CONFIG_PREEMPT_VOLUNTARY
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extern int _cond_resched(void);
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# define might_resched() _cond_resched()
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#else
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# define might_resched() do { } while (0)
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#endif
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#ifdef CONFIG_DEBUG_SPINLOCK_SLEEP
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void __might_sleep(char *file, int line, int preempt_offset);
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/**
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* might_sleep - annotation for functions that can sleep
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*
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* this macro will print a stack trace if it is executed in an atomic
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* context (spinlock, irq-handler, ...).
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*
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* This is a useful debugging help to be able to catch problems early and not
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* be bitten later when the calling function happens to sleep when it is not
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* supposed to.
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*/
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# define might_sleep() \
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do { __might_sleep(__FILE__, __LINE__, 0); might_resched(); } while (0)
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#else
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static inline void __might_sleep(char *file, int line, int preempt_offset) { }
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# define might_sleep() do { might_resched(); } while (0)
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#endif
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#define might_sleep_if(cond) do { if (cond) might_sleep(); } while (0)
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#define abs(x) ({ \
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long __x = (x); \
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(__x < 0) ? -__x : __x; \
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})
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#ifdef CONFIG_PROVE_LOCKING
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void might_fault(void);
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#else
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static inline void might_fault(void)
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{
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might_sleep();
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}
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#endif
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extern struct atomic_notifier_head panic_notifier_list;
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extern long (*panic_blink)(long time);
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NORET_TYPE void panic(const char * fmt, ...)
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__attribute__ ((NORET_AND format (printf, 1, 2))) __cold;
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extern void oops_enter(void);
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extern void oops_exit(void);
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extern int oops_may_print(void);
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NORET_TYPE void do_exit(long error_code)
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ATTRIB_NORET;
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NORET_TYPE void complete_and_exit(struct completion *, long)
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ATTRIB_NORET;
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extern unsigned long simple_strtoul(const char *,char **,unsigned int);
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extern long simple_strtol(const char *,char **,unsigned int);
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extern unsigned long long simple_strtoull(const char *,char **,unsigned int);
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extern long long simple_strtoll(const char *,char **,unsigned int);
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extern int strict_strtoul(const char *, unsigned int, unsigned long *);
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extern int strict_strtol(const char *, unsigned int, long *);
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extern int strict_strtoull(const char *, unsigned int, unsigned long long *);
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extern int strict_strtoll(const char *, unsigned int, long long *);
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extern int sprintf(char * buf, const char * fmt, ...)
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__attribute__ ((format (printf, 2, 3)));
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extern int vsprintf(char *buf, const char *, va_list)
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__attribute__ ((format (printf, 2, 0)));
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extern int snprintf(char * buf, size_t size, const char * fmt, ...)
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__attribute__ ((format (printf, 3, 4)));
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extern int vsnprintf(char *buf, size_t size, const char *fmt, va_list args)
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__attribute__ ((format (printf, 3, 0)));
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extern int scnprintf(char * buf, size_t size, const char * fmt, ...)
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__attribute__ ((format (printf, 3, 4)));
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extern int vscnprintf(char *buf, size_t size, const char *fmt, va_list args)
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__attribute__ ((format (printf, 3, 0)));
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extern char *kasprintf(gfp_t gfp, const char *fmt, ...)
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__attribute__ ((format (printf, 2, 3)));
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extern char *kvasprintf(gfp_t gfp, const char *fmt, va_list args);
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extern int sscanf(const char *, const char *, ...)
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__attribute__ ((format (scanf, 2, 3)));
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extern int vsscanf(const char *, const char *, va_list)
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__attribute__ ((format (scanf, 2, 0)));
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extern int get_option(char **str, int *pint);
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extern char *get_options(const char *str, int nints, int *ints);
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extern unsigned long long memparse(const char *ptr, char **retptr);
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extern int core_kernel_text(unsigned long addr);
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extern int __kernel_text_address(unsigned long addr);
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extern int kernel_text_address(unsigned long addr);
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extern int func_ptr_is_kernel_text(void *ptr);
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struct pid;
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extern struct pid *session_of_pgrp(struct pid *pgrp);
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/*
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* FW_BUG
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* Add this to a message where you are sure the firmware is buggy or behaves
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* really stupid or out of spec. Be aware that the responsible BIOS developer
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* should be able to fix this issue or at least get a concrete idea of the
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* problem by reading your message without the need of looking at the kernel
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* code.
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*
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* Use it for definite and high priority BIOS bugs.
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*
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* FW_WARN
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* Use it for not that clear (e.g. could the kernel messed up things already?)
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* and medium priority BIOS bugs.
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*
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* FW_INFO
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* Use this one if you want to tell the user or vendor about something
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* suspicious, but generally harmless related to the firmware.
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*
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* Use it for information or very low priority BIOS bugs.
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*/
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#define FW_BUG "[Firmware Bug]: "
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#define FW_WARN "[Firmware Warn]: "
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#define FW_INFO "[Firmware Info]: "
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#ifdef CONFIG_PRINTK
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asmlinkage int vprintk(const char *fmt, va_list args)
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__attribute__ ((format (printf, 1, 0)));
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asmlinkage int printk(const char * fmt, ...)
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__attribute__ ((format (printf, 1, 2))) __cold;
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extern struct ratelimit_state printk_ratelimit_state;
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extern int printk_ratelimit(void);
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extern bool printk_timed_ratelimit(unsigned long *caller_jiffies,
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unsigned int interval_msec);
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extern int printk_delay_msec;
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/*
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* Print a one-time message (analogous to WARN_ONCE() et al):
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*/
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#define printk_once(x...) ({ \
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static bool __print_once = true; \
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\
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if (__print_once) { \
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__print_once = false; \
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printk(x); \
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} \
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})
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void log_buf_kexec_setup(void);
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#else
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static inline int vprintk(const char *s, va_list args)
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__attribute__ ((format (printf, 1, 0)));
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static inline int vprintk(const char *s, va_list args) { return 0; }
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static inline int printk(const char *s, ...)
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__attribute__ ((format (printf, 1, 2)));
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static inline int __cold printk(const char *s, ...) { return 0; }
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static inline int printk_ratelimit(void) { return 0; }
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static inline bool printk_timed_ratelimit(unsigned long *caller_jiffies, \
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unsigned int interval_msec) \
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{ return false; }
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/* No effect, but we still get type checking even in the !PRINTK case: */
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#define printk_once(x...) printk(x)
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static inline void log_buf_kexec_setup(void)
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{
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}
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#endif
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extern int printk_needs_cpu(int cpu);
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extern void printk_tick(void);
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extern void asmlinkage __attribute__((format(printf, 1, 2)))
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early_printk(const char *fmt, ...);
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unsigned long int_sqrt(unsigned long);
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static inline void console_silent(void)
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{
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console_loglevel = 0;
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}
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static inline void console_verbose(void)
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{
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if (console_loglevel)
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console_loglevel = 15;
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}
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extern void bust_spinlocks(int yes);
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extern void wake_up_klogd(void);
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extern int oops_in_progress; /* If set, an oops, panic(), BUG() or die() is in progress */
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extern int panic_timeout;
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extern int panic_on_oops;
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extern int panic_on_unrecovered_nmi;
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extern int panic_on_io_nmi;
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extern const char *print_tainted(void);
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extern void add_taint(unsigned flag);
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extern int test_taint(unsigned flag);
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extern unsigned long get_taint(void);
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extern int root_mountflags;
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/* Values used for system_state */
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extern enum system_states {
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SYSTEM_BOOTING,
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SYSTEM_RUNNING,
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SYSTEM_HALT,
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SYSTEM_POWER_OFF,
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SYSTEM_RESTART,
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SYSTEM_SUSPEND_DISK,
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} system_state;
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#define TAINT_PROPRIETARY_MODULE 0
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#define TAINT_FORCED_MODULE 1
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#define TAINT_UNSAFE_SMP 2
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#define TAINT_FORCED_RMMOD 3
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#define TAINT_MACHINE_CHECK 4
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#define TAINT_BAD_PAGE 5
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#define TAINT_USER 6
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#define TAINT_DIE 7
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#define TAINT_OVERRIDDEN_ACPI_TABLE 8
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#define TAINT_WARN 9
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#define TAINT_CRAP 10
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extern void dump_stack(void) __cold;
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enum {
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DUMP_PREFIX_NONE,
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DUMP_PREFIX_ADDRESS,
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DUMP_PREFIX_OFFSET
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};
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extern void hex_dump_to_buffer(const void *buf, size_t len,
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int rowsize, int groupsize,
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char *linebuf, size_t linebuflen, bool ascii);
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extern void print_hex_dump(const char *level, const char *prefix_str,
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int prefix_type, int rowsize, int groupsize,
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const void *buf, size_t len, bool ascii);
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extern void print_hex_dump_bytes(const char *prefix_str, int prefix_type,
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const void *buf, size_t len);
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extern const char hex_asc[];
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#define hex_asc_lo(x) hex_asc[((x) & 0x0f)]
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#define hex_asc_hi(x) hex_asc[((x) & 0xf0) >> 4]
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static inline char *pack_hex_byte(char *buf, u8 byte)
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{
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*buf++ = hex_asc_hi(byte);
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*buf++ = hex_asc_lo(byte);
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return buf;
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}
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#ifndef pr_fmt
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#define pr_fmt(fmt) fmt
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#endif
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#define pr_emerg(fmt, ...) \
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printk(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__)
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#define pr_alert(fmt, ...) \
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printk(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__)
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#define pr_crit(fmt, ...) \
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printk(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__)
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#define pr_err(fmt, ...) \
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printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
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#define pr_warning(fmt, ...) \
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printk(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__)
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#define pr_notice(fmt, ...) \
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printk(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__)
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#define pr_info(fmt, ...) \
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printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
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#define pr_cont(fmt, ...) \
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printk(KERN_CONT fmt, ##__VA_ARGS__)
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/* pr_devel() should produce zero code unless DEBUG is defined */
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#ifdef DEBUG
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#define pr_devel(fmt, ...) \
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printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
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#else
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#define pr_devel(fmt, ...) \
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({ if (0) printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); 0; })
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#endif
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/* If you are writing a driver, please use dev_dbg instead */
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#if defined(DEBUG)
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#define pr_debug(fmt, ...) \
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printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
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#elif defined(CONFIG_DYNAMIC_DEBUG)
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/* dynamic_pr_debug() uses pr_fmt() internally so we don't need it here */
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#define pr_debug(fmt, ...) do { \
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dynamic_pr_debug(fmt, ##__VA_ARGS__); \
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} while (0)
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#else
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#define pr_debug(fmt, ...) \
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({ if (0) printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); 0; })
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#endif
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/*
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* General tracing related utility functions - trace_printk(),
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* tracing_on/tracing_off and tracing_start()/tracing_stop
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*
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* Use tracing_on/tracing_off when you want to quickly turn on or off
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* tracing. It simply enables or disables the recording of the trace events.
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* This also corresponds to the user space /sys/kernel/debug/tracing/tracing_on
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* file, which gives a means for the kernel and userspace to interact.
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* Place a tracing_off() in the kernel where you want tracing to end.
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* From user space, examine the trace, and then echo 1 > tracing_on
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* to continue tracing.
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*
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* tracing_stop/tracing_start has slightly more overhead. It is used
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* by things like suspend to ram where disabling the recording of the
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* trace is not enough, but tracing must actually stop because things
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* like calling smp_processor_id() may crash the system.
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*
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* Most likely, you want to use tracing_on/tracing_off.
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*/
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#ifdef CONFIG_RING_BUFFER
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void tracing_on(void);
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void tracing_off(void);
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/* trace_off_permanent stops recording with no way to bring it back */
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void tracing_off_permanent(void);
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int tracing_is_on(void);
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#else
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static inline void tracing_on(void) { }
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static inline void tracing_off(void) { }
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static inline void tracing_off_permanent(void) { }
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static inline int tracing_is_on(void) { return 0; }
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#endif
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#ifdef CONFIG_TRACING
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extern void tracing_start(void);
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extern void tracing_stop(void);
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extern void ftrace_off_permanent(void);
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extern void
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ftrace_special(unsigned long arg1, unsigned long arg2, unsigned long arg3);
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static inline void __attribute__ ((format (printf, 1, 2)))
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____trace_printk_check_format(const char *fmt, ...)
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{
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}
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#define __trace_printk_check_format(fmt, args...) \
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do { \
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if (0) \
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____trace_printk_check_format(fmt, ##args); \
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} while (0)
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/**
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* trace_printk - printf formatting in the ftrace buffer
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* @fmt: the printf format for printing
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*
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* Note: __trace_printk is an internal function for trace_printk and
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* the @ip is passed in via the trace_printk macro.
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*
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* This function allows a kernel developer to debug fast path sections
|
|
* that printk is not appropriate for. By scattering in various
|
|
* printk like tracing in the code, a developer can quickly see
|
|
* where problems are occurring.
|
|
*
|
|
* This is intended as a debugging tool for the developer only.
|
|
* Please refrain from leaving trace_printks scattered around in
|
|
* your code.
|
|
*/
|
|
|
|
#define trace_printk(fmt, args...) \
|
|
do { \
|
|
__trace_printk_check_format(fmt, ##args); \
|
|
if (__builtin_constant_p(fmt)) { \
|
|
static const char *trace_printk_fmt \
|
|
__attribute__((section("__trace_printk_fmt"))) = \
|
|
__builtin_constant_p(fmt) ? fmt : NULL; \
|
|
\
|
|
__trace_bprintk(_THIS_IP_, trace_printk_fmt, ##args); \
|
|
} else \
|
|
__trace_printk(_THIS_IP_, fmt, ##args); \
|
|
} while (0)
|
|
|
|
extern int
|
|
__trace_bprintk(unsigned long ip, const char *fmt, ...)
|
|
__attribute__ ((format (printf, 2, 3)));
|
|
|
|
extern int
|
|
__trace_printk(unsigned long ip, const char *fmt, ...)
|
|
__attribute__ ((format (printf, 2, 3)));
|
|
|
|
/*
|
|
* The double __builtin_constant_p is because gcc will give us an error
|
|
* if we try to allocate the static variable to fmt if it is not a
|
|
* constant. Even with the outer if statement.
|
|
*/
|
|
#define ftrace_vprintk(fmt, vargs) \
|
|
do { \
|
|
if (__builtin_constant_p(fmt)) { \
|
|
static const char *trace_printk_fmt \
|
|
__attribute__((section("__trace_printk_fmt"))) = \
|
|
__builtin_constant_p(fmt) ? fmt : NULL; \
|
|
\
|
|
__ftrace_vbprintk(_THIS_IP_, trace_printk_fmt, vargs); \
|
|
} else \
|
|
__ftrace_vprintk(_THIS_IP_, fmt, vargs); \
|
|
} while (0)
|
|
|
|
extern int
|
|
__ftrace_vbprintk(unsigned long ip, const char *fmt, va_list ap);
|
|
|
|
extern int
|
|
__ftrace_vprintk(unsigned long ip, const char *fmt, va_list ap);
|
|
|
|
extern void ftrace_dump(void);
|
|
#else
|
|
static inline void
|
|
ftrace_special(unsigned long arg1, unsigned long arg2, unsigned long arg3) { }
|
|
static inline int
|
|
trace_printk(const char *fmt, ...) __attribute__ ((format (printf, 1, 2)));
|
|
|
|
static inline void tracing_start(void) { }
|
|
static inline void tracing_stop(void) { }
|
|
static inline void ftrace_off_permanent(void) { }
|
|
static inline int
|
|
trace_printk(const char *fmt, ...)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline int
|
|
ftrace_vprintk(const char *fmt, va_list ap)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline void ftrace_dump(void) { }
|
|
#endif /* CONFIG_TRACING */
|
|
|
|
/*
|
|
* Display an IP address in readable format.
|
|
*/
|
|
|
|
#define NIPQUAD(addr) \
|
|
((unsigned char *)&addr)[0], \
|
|
((unsigned char *)&addr)[1], \
|
|
((unsigned char *)&addr)[2], \
|
|
((unsigned char *)&addr)[3]
|
|
#define NIPQUAD_FMT "%u.%u.%u.%u"
|
|
|
|
/*
|
|
* min()/max()/clamp() macros that also do
|
|
* strict type-checking.. See the
|
|
* "unnecessary" pointer comparison.
|
|
*/
|
|
#define min(x, y) ({ \
|
|
typeof(x) _min1 = (x); \
|
|
typeof(y) _min2 = (y); \
|
|
(void) (&_min1 == &_min2); \
|
|
_min1 < _min2 ? _min1 : _min2; })
|
|
|
|
#define max(x, y) ({ \
|
|
typeof(x) _max1 = (x); \
|
|
typeof(y) _max2 = (y); \
|
|
(void) (&_max1 == &_max2); \
|
|
_max1 > _max2 ? _max1 : _max2; })
|
|
|
|
/**
|
|
* clamp - return a value clamped to a given range with strict typechecking
|
|
* @val: current value
|
|
* @min: minimum allowable value
|
|
* @max: maximum allowable value
|
|
*
|
|
* This macro does strict typechecking of min/max to make sure they are of the
|
|
* same type as val. See the unnecessary pointer comparisons.
|
|
*/
|
|
#define clamp(val, min, max) ({ \
|
|
typeof(val) __val = (val); \
|
|
typeof(min) __min = (min); \
|
|
typeof(max) __max = (max); \
|
|
(void) (&__val == &__min); \
|
|
(void) (&__val == &__max); \
|
|
__val = __val < __min ? __min: __val; \
|
|
__val > __max ? __max: __val; })
|
|
|
|
/*
|
|
* ..and if you can't take the strict
|
|
* types, you can specify one yourself.
|
|
*
|
|
* Or not use min/max/clamp at all, of course.
|
|
*/
|
|
#define min_t(type, x, y) ({ \
|
|
type __min1 = (x); \
|
|
type __min2 = (y); \
|
|
__min1 < __min2 ? __min1: __min2; })
|
|
|
|
#define max_t(type, x, y) ({ \
|
|
type __max1 = (x); \
|
|
type __max2 = (y); \
|
|
__max1 > __max2 ? __max1: __max2; })
|
|
|
|
/**
|
|
* clamp_t - return a value clamped to a given range using a given type
|
|
* @type: the type of variable to use
|
|
* @val: current value
|
|
* @min: minimum allowable value
|
|
* @max: maximum allowable value
|
|
*
|
|
* This macro does no typechecking and uses temporary variables of type
|
|
* 'type' to make all the comparisons.
|
|
*/
|
|
#define clamp_t(type, val, min, max) ({ \
|
|
type __val = (val); \
|
|
type __min = (min); \
|
|
type __max = (max); \
|
|
__val = __val < __min ? __min: __val; \
|
|
__val > __max ? __max: __val; })
|
|
|
|
/**
|
|
* clamp_val - return a value clamped to a given range using val's type
|
|
* @val: current value
|
|
* @min: minimum allowable value
|
|
* @max: maximum allowable value
|
|
*
|
|
* This macro does no typechecking and uses temporary variables of whatever
|
|
* type the input argument 'val' is. This is useful when val is an unsigned
|
|
* type and min and max are literals that will otherwise be assigned a signed
|
|
* integer type.
|
|
*/
|
|
#define clamp_val(val, min, max) ({ \
|
|
typeof(val) __val = (val); \
|
|
typeof(val) __min = (min); \
|
|
typeof(val) __max = (max); \
|
|
__val = __val < __min ? __min: __val; \
|
|
__val > __max ? __max: __val; })
|
|
|
|
|
|
/*
|
|
* swap - swap value of @a and @b
|
|
*/
|
|
#define swap(a, b) \
|
|
do { typeof(a) __tmp = (a); (a) = (b); (b) = __tmp; } while (0)
|
|
|
|
/**
|
|
* container_of - cast a member of a structure out to the containing structure
|
|
* @ptr: the pointer to the member.
|
|
* @type: the type of the container struct this is embedded in.
|
|
* @member: the name of the member within the struct.
|
|
*
|
|
*/
|
|
#define container_of(ptr, type, member) ({ \
|
|
const typeof( ((type *)0)->member ) *__mptr = (ptr); \
|
|
(type *)( (char *)__mptr - offsetof(type,member) );})
|
|
|
|
struct sysinfo;
|
|
extern int do_sysinfo(struct sysinfo *info);
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
#ifndef __EXPORTED_HEADERS__
|
|
#ifndef __KERNEL__
|
|
#warning Attempt to use kernel headers from user space, see http://kernelnewbies.org/KernelHeaders
|
|
#endif /* __KERNEL__ */
|
|
#endif /* __EXPORTED_HEADERS__ */
|
|
|
|
#define SI_LOAD_SHIFT 16
|
|
struct sysinfo {
|
|
long uptime; /* Seconds since boot */
|
|
unsigned long loads[3]; /* 1, 5, and 15 minute load averages */
|
|
unsigned long totalram; /* Total usable main memory size */
|
|
unsigned long freeram; /* Available memory size */
|
|
unsigned long sharedram; /* Amount of shared memory */
|
|
unsigned long bufferram; /* Memory used by buffers */
|
|
unsigned long totalswap; /* Total swap space size */
|
|
unsigned long freeswap; /* swap space still available */
|
|
unsigned short procs; /* Number of current processes */
|
|
unsigned short pad; /* explicit padding for m68k */
|
|
unsigned long totalhigh; /* Total high memory size */
|
|
unsigned long freehigh; /* Available high memory size */
|
|
unsigned int mem_unit; /* Memory unit size in bytes */
|
|
char _f[20-2*sizeof(long)-sizeof(int)]; /* Padding: libc5 uses this.. */
|
|
};
|
|
|
|
/* Force a compilation error if condition is true */
|
|
#define BUILD_BUG_ON(condition) ((void)BUILD_BUG_ON_ZERO(condition))
|
|
|
|
/* Force a compilation error if condition is constant and true */
|
|
#define MAYBE_BUILD_BUG_ON(cond) ((void)sizeof(char[1 - 2 * !!(cond)]))
|
|
|
|
/* Force a compilation error if condition is true, but also produce a
|
|
result (of value 0 and type size_t), so the expression can be used
|
|
e.g. in a structure initializer (or where-ever else comma expressions
|
|
aren't permitted). */
|
|
#define BUILD_BUG_ON_ZERO(e) (sizeof(struct { int:-!!(e); }))
|
|
#define BUILD_BUG_ON_NULL(e) ((void *)sizeof(struct { int:-!!(e); }))
|
|
|
|
/* 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
|
|
#else
|
|
#define NUMA_BUILD 0
|
|
#endif
|
|
|
|
/* Rebuild everything on CONFIG_FTRACE_MCOUNT_RECORD */
|
|
#ifdef CONFIG_FTRACE_MCOUNT_RECORD
|
|
# define REBUILD_DUE_TO_FTRACE_MCOUNT_RECORD
|
|
#endif
|
|
|
|
#endif
|