include/linux/ceph/ceph_debug.h

   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