Merge tag 'trace-v5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux...

[sfrench/cifs-2.6.git] / Documentation / core-api / printk-formats.rst

diff --git a/Documentation/core-api/printk-formats.rst b/Documentation/core-api/printk-formats.rst
index ff48b55040ef5acfd3ddac0cfca818f35116f472..c37ec7cd9c060c30c5dfd167c62faaf94c34a3ab 100644 (file)
--- a/Documentation/core-api/printk-formats.rst
+++ b/Documentation/core-api/printk-formats.rst
@@ -13,6 +13,10 @@ Integer types
 
        If variable is of Type,         use printk format specifier:
        ------------------------------------------------------------
+               char                    %hhd or %hhx
+               unsigned char           %hhu or %hhx
+               short int               %hd or %hx
+               unsigned short int      %hu or %hx
                int                     %d or %x
                unsigned int            %u or %x
                long                    %ld or %lx
@@ -21,6 +25,10 @@ Integer types
                unsigned long long      %llu or %llx
                size_t                  %zu or %zx
                ssize_t                 %zd or %zx
+               s8                      %hhd or %hhx
+               u8                      %hhu or %hhx
+               s16                     %hd or %hx
+               u16                     %hu or %hx
                s32                     %d or %x
                u32                     %u or %x
                s64                     %lld or %llx
@@ -412,6 +420,24 @@ Examples::
 
 Passed by reference.
 
+Time and date (struct rtc_time)
+-------------------------------
+
+::
+
+       %ptR            YYYY-mm-ddTHH:MM:SS
+       %ptRd           YYYY-mm-dd
+       %ptRt           HH:MM:SS
+       %ptR[dt][r]
+
+For printing date and time as represented by struct rtc_time structure in
+human readable format.
+
+By default year will be incremented by 1900 and month by 1. Use %ptRr (raw)
+to suppress this behaviour.
+
+Passed by reference.
+
 struct clk
 ----------