UBIFS: switch to dynamic printks

Switch to debugging using dynamic printk (pr_debug()). There is no good reason
to carry custom debugging prints if there is so cool and powerful generic
dynamic printk infrastructure, see Documentation/dynamic-debug-howto.txt. With
dynamic printks we can switch on/of individual prints, per-file, per-function
and per format messages. This means that instead of doing old-fashioned

echo 1 > /sys/module/ubifs/parameters/debug_msgs

to enable general messages, we can do:

echo 'format "UBIFS DBG gen" +ptlf' > control

to enable general messages and additionally ask the dynamic printk
infrastructure to print process ID, line number and function name. So there is
no reason to keep UBIFS-specific crud if there is more powerful generic thing.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>

1 files changed, 2 insertions, 23 deletions

diff --git a/Documentation/filesystems/ubifs.txt b/Documentation/filesystems/ubifs.txt
index 7d17e5b91ff4..8e4fab639d9c 100644
--- a/Documentation/filesystems/ubifs.txt
+++ b/Documentation/filesystems/ubifs.txt
@@ -115,28 +115,8 @@ ubi.mtd=0 root=ubi0:rootfs rootfstype=ubifs
 Module Parameters for Debugging
 ===============================
 
-When UBIFS has been compiled with debugging enabled, there are 3 module
+When UBIFS has been compiled with debugging enabled, there are 2 module
 parameters that are available to control aspects of testing and debugging.
-The parameters are unsigned integers where each bit controls an option.
-The parameters are:
-
-debug_msgs      Selects which debug messages to display, as follows:
-
-                Message Type                            Flag value
-
-                General messages                        1
-                Journal messages                        2
-                Mount messages                          4
-                Commit messages                         8
-                LEB search messages                     16
-                Budgeting messages                      32
-                Garbage collection messages             64
-                Tree Node Cache (TNC) messages          128
-                LEB properties (lprops) messages        256
-                Input/output messages                   512
-                Log messages                            1024
-                Scan messages                           2048
-                Recovery messages                       4096
 
 debug_chks      Selects extra checks that UBIFS can do while running:
 
@@ -156,8 +136,7 @@ debug_tsts	Selects a mode of testing, as follows:
 
                 Failure mode for recovery testing       4
 
-For example, set debug_msgs to 5 to display General messages and Mount
-messages.
+For example, set debug_chks to 3 to enable general and TNC checks.
 
 
 References