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| author | FreeArtMan <dos21h@gmail.com> | 2016-09-15 20:03:05 +0100 |
|---|---|---|
| committer | FreeArtMan <dos21h@gmail.com> | 2016-09-15 20:03:05 +0100 |
| commit | b5d250a50ec0ae873fea50cc574d056620032ec5 (patch) | |
| tree | e82f3b94fe3dcac2b8fdd6eb7ff9f545367acda3 | |
| parent | 1d307431912f03d18c7fc2a0ca6aadd8b09bb5de (diff) | |
| download | md-content-b5d250a50ec0ae873fea50cc574d056620032ec5.tar.gz md-content-b5d250a50ec0ae873fea50cc574d056620032ec5.zip | |
Kernel debug messages: new chapter about different printk macroses
| -rw-r--r-- | md/writeup/kernel_debug_messages.md | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/md/writeup/kernel_debug_messages.md b/md/writeup/kernel_debug_messages.md index 38b566a..2a36696 100644 --- a/md/writeup/kernel_debug_messages.md +++ b/md/writeup/kernel_debug_messages.md @@ -141,6 +141,26 @@ Here is defined formating specifiers __Documentation/printk-formats.txt__ | bitfields such as page flags, gfp_flags | %pG[pgv] | | netdev_features_t | %pNF | +## Shortened printk versions +Header files defines shortcut versions of print functions for each of log level. + +| Function names | Note | +| --- | --- | +| pr_emerg | | +| pr_alert | | +| pr_crit | | +| pr_err | | +| pr_warn | | +| pr_notice | | +| pr_info | | +| no_printk | dummy printk without output | +| pr_devel | when DEBUG is defined | +| printk_once | print one time messages | +| printk_deferred_once | | +| pr_*_once | print once loglevel specific| +| printk_ratelimited | | +| pr_*_ratelimited | printk with loglevel and ratelimit | + ## Links 1. http://elinux.org/Debugging_by_printing |