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Diffstat (limited to 'Documentation/printk-formats.txt')
| -rw-r--r-- | Documentation/printk-formats.txt | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/Documentation/printk-formats.txt b/Documentation/printk-formats.txt index 5d1128bf0282..5962949944fd 100644 --- a/Documentation/printk-formats.txt +++ b/Documentation/printk-formats.txt @@ -298,6 +298,24 @@ bitmap and its derivatives such as cpumask and nodemask: Passed by reference. +Flags bitfields such as page flags, gfp_flags: + + %pGp referenced|uptodate|lru|active|private + %pGg GFP_USER|GFP_DMA32|GFP_NOWARN + %pGv read|exec|mayread|maywrite|mayexec|denywrite + + For printing flags bitfields as a collection of symbolic constants that + would construct the value. The type of flags is given by the third + character. Currently supported are [p]age flags, [v]ma_flags (both + expect unsigned long *) and [g]fp_flags (expects gfp_t *). The flag + names and print order depends on the particular type. + + Note that this format should not be used directly in TP_printk() part + of a tracepoint. Instead, use the show_*_flags() functions from + <trace/events/mmflags.h>. + + Passed by reference. + Network device features: %pNF 0x000000000000c000 |