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| author | Carlos Llamas <cmllamas@google.com> | 2021-06-09 19:50:58 +0000 |
|---|---|---|
| committer | Jonathan Corbet <corbet@lwn.net> | 2021-06-14 08:12:01 -0600 |
| commit | d7c176e9b5329b4a490b3d8ea49564fc9ff11071 (patch) | |
| tree | 86aa0849909914192428d21af330e020744774f1 /Documentation/core-api/printk-formats.rst | |
| parent | a9edc03f13dbd51095b38ef0371d24e7ec7ae693 (diff) | |
docs: printk-formats: update size-casting examples
Since commit 72deb455b5ec ("block: remove CONFIG_LBDAF") sector_t and
blkcnt_t types are no longer variable in size, making them unsuitable
examples for casting to the largest possible type. This patch replaces
such examples with cycles_t and blk_status_t types, whose sizes depend
on architecture and config options respectively.
Signed-off-by: Carlos Llamas <cmllamas@google.com>
Link: https://lore.kernel.org/r/20210609195058.3518943-1-cmllamas@google.com
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 | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/Documentation/core-api/printk-formats.rst b/Documentation/core-api/printk-formats.rst index f063a384c7c8..385c0cc52f1f 100644 --- a/Documentation/core-api/printk-formats.rst +++ b/Documentation/core-api/printk-formats.rst @@ -37,14 +37,13 @@ Integer types u64 %llu or %llx -If <type> is dependent on a config option for its size (e.g., sector_t, -blkcnt_t) or is architecture-dependent for its size (e.g., tcflag_t), use a -format specifier of its largest possible type and explicitly cast to it. +If <type> is architecture-dependent for its size (e.g., cycles_t, tcflag_t) or +is dependent on a config option for its size (e.g., blk_status_t), use a format +specifier of its largest possible type and explicitly cast to it. Example:: - printk("test: sector number/total blocks: %llu/%llu\n", - (unsigned long long)sector, (unsigned long long)blockcount); + printk("test: latency: %llu cycles\n", (unsigned long long)time); Reminder: sizeof() returns type size_t. |