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| author | Geert Uytterhoeven <geert+renesas@glider.be> | 2020-11-10 15:41:21 +0100 |
|---|---|---|
| committer | Jonathan Corbet <corbet@lwn.net> | 2020-11-13 15:03:20 -0700 |
| commit | 04d0608b4407cedb69a0951899c75002ddaf1681 (patch) | |
| tree | ecde08dc614050d3679e8346b07ab6c13115d7ad /Documentation/core-api/printk-formats.rst | |
| parent | bfe7bf311497815d7c7a21f97598b8e9cb47cb52 (diff) | |
docs: core-api/printk-formats.rst: Clarify formatting {cpu,node}mask
Clarify how to pass the field width for bitmaps, and mention the helper
macros that are available to ease printing cpumask and nodemask.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20201110144121.3278667-1-geert+renesas@glider.be
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Diffstat (limited to 'Documentation/core-api/printk-formats.rst')
| -rw-r--r-- | Documentation/core-api/printk-formats.rst | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/Documentation/core-api/printk-formats.rst b/Documentation/core-api/printk-formats.rst index 6d26c5c6ac48..160e710d992f 100644 --- a/Documentation/core-api/printk-formats.rst +++ b/Documentation/core-api/printk-formats.rst @@ -531,7 +531,9 @@ For printing bitmap and its derivatives such as cpumask and nodemask, %*pb outputs the bitmap with field width as the number of bits and %*pbl output the bitmap as range list with field width as the number of bits. -Passed by reference. +The field width is passed by value, the bitmap is passed by reference. +Helper macros cpumask_pr_args() and nodemask_pr_args() are available to ease +printing cpumask and nodemask. Flags bitfields such as page flags, gfp_flags --------------------------------------------- |