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authorLinus Torvalds <torvalds@linux-foundation.org>2021-06-29 12:07:18 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2021-06-29 12:07:18 -0700
commite563592c3e4296780e5a184a917b8b86e126f0b3 (patch)
tree3f52a0f2976dd29505f05a94b1ff80b9c6c8f517 /Documentation/core-api
parentb694011a4aec3e8df98bc59fdb78e018b09de79d (diff)
parent94f2be50badfa88e96033e77621c6711d58f84d3 (diff)
Merge tag 'printk-for-5.14' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux
Pull printk updates from Petr Mladek: - Add %pt[RT]s modifier to vsprintf(). It overrides ISO 8601 separator by using ' ' (space). It produces "YYYY-mm-dd HH:MM:SS" instead of "YYYY-mm-ddTHH:MM:SS". - Correctly parse long row of numbers by sscanf() when using the field width. Add extensive sscanf() selftest. - Generalize re-entrant CPU lock that has already been used to serialize dump_stack() output. It is part of the ongoing printk rework. It will allow to remove the obsoleted printk_safe buffers and introduce atomic consoles. - Some code clean up and sparse warning fixes. * tag 'printk-for-5.14' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux: printk: fix cpu lock ordering lib/dump_stack: move cpu lock to printk.c printk: Remove trailing semicolon in macros random32: Fix implicit truncation warning in prandom_seed_state() lib: test_scanf: Remove pointless use of type_min() with unsigned types selftests: lib: Add wrapper script for test_scanf lib: test_scanf: Add tests for sscanf number conversion lib: vsprintf: Fix handling of number field widths in vsscanf lib: vsprintf: scanf: Negative number must have field width > 1 usb: host: xhci-tegra: Switch to use %ptTs nilfs2: Switch to use %ptTs kdb: Switch to use %ptTs lib/vsprintf: Allow to override ISO 8601 date and time separator
Diffstat (limited to 'Documentation/core-api')
-rw-r--r--Documentation/core-api/printk-formats.rst7
1 files changed, 6 insertions, 1 deletions
diff --git a/Documentation/core-api/printk-formats.rst b/Documentation/core-api/printk-formats.rst
index 385c0cc52f1f..4346ae17a72c 100644
--- a/Documentation/core-api/printk-formats.rst
+++ b/Documentation/core-api/printk-formats.rst
@@ -513,9 +513,10 @@ Time and date
::
%pt[RT] YYYY-mm-ddTHH:MM:SS
+ %pt[RT]s YYYY-mm-dd HH:MM:SS
%pt[RT]d YYYY-mm-dd
%pt[RT]t HH:MM:SS
- %pt[RT][dt][r]
+ %pt[RT][dt][r][s]
For printing date and time as represented by::
@@ -527,6 +528,10 @@ in human readable format.
By default year will be incremented by 1900 and month by 1.
Use %pt[RT]r (raw) to suppress this behaviour.
+The %pt[RT]s (space) will override ISO 8601 separator by using ' ' (space)
+instead of 'T' (Capital T) between date and time. It won't have any effect
+when date or time is omitted.
+
Passed by reference.
struct clk