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Linux/include/linux/ceph/ceph_debug.h

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  1 #ifndef _FS_CEPH_DEBUG_H
  2 #define _FS_CEPH_DEBUG_H
  3 
  4 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  5 
  6 #ifdef CONFIG_CEPH_LIB_PRETTYDEBUG
  7 
  8 /*
  9  * wrap pr_debug to include a filename:lineno prefix on each line.
 10  * this incurs some overhead (kernel size and execution time) due to
 11  * the extra function call at each call site.
 12  */
 13 
 14 # if defined(DEBUG) || defined(CONFIG_DYNAMIC_DEBUG)
 15 extern const char *ceph_file_part(const char *s, int len);
 16 #  define dout(fmt, ...)                                                \
 17         pr_debug("%.*s %12.12s:%-4d : " fmt,                            \
 18                  8 - (int)sizeof(KBUILD_MODNAME), "    ",               \
 19                  ceph_file_part(__FILE__, sizeof(__FILE__)),            \
 20                  __LINE__, ##__VA_ARGS__)
 21 # else
 22 /* faux printk call just to see any compiler warnings. */
 23 #  define dout(fmt, ...)        do {                            \
 24                 if (0)                                          \
 25                         printk(KERN_DEBUG fmt, ##__VA_ARGS__);  \
 26         } while (0)
 27 # endif
 28 
 29 #else
 30 
 31 /*
 32  * or, just wrap pr_debug
 33  */
 34 # define dout(fmt, ...) pr_debug(" " fmt, ##__VA_ARGS__)
 35 
 36 #endif
 37 
 38 #endif
 39 

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