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authorCarlos Llamas <cmllamas@google.com>2021-06-09 22:50:58 +0300
committerJonathan Corbet <corbet@lwn.net>2021-06-14 17:12:01 +0300
commitd7c176e9b5329b4a490b3d8ea49564fc9ff11071 (patch)
tree86aa0849909914192428d21af330e020744774f1 /Documentation/core-api/printk-formats.rst
parenta9edc03f13dbd51095b38ef0371d24e7ec7ae693 (diff)
downloadlinux-d7c176e9b5329b4a490b3d8ea49564fc9ff11071.tar.xz
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.rst9
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.