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authorLinus Torvalds <torvalds@linux-foundation.org>2019-03-09 09:22:42 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2019-03-09 09:22:42 -0800
commitc4703acd6d4a58dc4b31ad2a8f8b14becb898d25 (patch)
tree722bea1c4e9dc4230e7a2828a52fb4d5a55214b3 /lib
parenta448c643bc49f14bb3aae68ee7085b4c7f6207d8 (diff)
parent943ca6ad81e5b37bd5d22cbab5ad06dc97fc001c (diff)
Merge tag 'printk-for-5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/pmladek/printk
Pull printk updates from Petr Mladek: - Allow to sort mixed lines by an extra information about the caller - Remove no longer used LOG_PREFIX. - Some clean up and documentation update. * tag 'printk-for-5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/pmladek/printk: printk/docs: Add extra integer types to printk-formats printk: Remove no longer used LOG_PREFIX. lib/vsprintf: Remove %pCr remnant in comment printk: Pass caller information to log_store(). printk: Add caller information to printk() output.
Diffstat (limited to 'lib')
-rw-r--r--lib/Kconfig.debug17
-rw-r--r--lib/vsprintf.c1
2 files changed, 17 insertions, 1 deletions
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index e718487c97c3..91ed81250fb3 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -17,6 +17,23 @@ config PRINTK_TIME
The behavior is also controlled by the kernel command line
parameter printk.time=1. See Documentation/admin-guide/kernel-parameters.rst
+config PRINTK_CALLER
+ bool "Show caller information on printks"
+ depends on PRINTK
+ help
+ Selecting this option causes printk() to add a caller "thread id" (if
+ in task context) or a caller "processor id" (if not in task context)
+ to every message.
+
+ This option is intended for environments where multiple threads
+ concurrently call printk() for many times, for it is difficult to
+ interpret without knowing where these lines (or sometimes individual
+ line which was divided into multiple lines due to race) came from.
+
+ Since toggling after boot makes the code racy, currently there is
+ no option to enable/disable at the kernel command line parameter or
+ sysfs interface.
+
config CONSOLE_LOGLEVEL_DEFAULT
int "Default console loglevel (1-15)"
range 1 15
diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index 30b00de4f321..791b6fa36905 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -1931,7 +1931,6 @@ char *device_node_string(char *buf, char *end, struct device_node *dn,
* (legacy clock framework) of the clock
* - 'Cn' For a clock, it prints the name (Common Clock Framework) or address
* (legacy clock framework) of the clock
- * - 'Cr' For a clock, it prints the current rate of the clock
* - 'G' For flags to be printed as a collection of symbolic strings that would
* construct the specific value. Supported flags given by option:
* p page flags (see struct page) given as pointer to unsigned long