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Diffstat (limited to 'Documentation/core-api/printk-formats.rst')
| -rw-r--r-- | Documentation/core-api/printk-formats.rst | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/Documentation/core-api/printk-formats.rst b/Documentation/core-api/printk-formats.rst index ea21dd4b9bad..8ebe46b1af39 100644 --- a/Documentation/core-api/printk-formats.rst +++ b/Documentation/core-api/printk-formats.rst @@ -137,6 +137,20 @@ equivalent to %lx (or %lu). %px is preferred because it is more uniquely grep'able. If in the future we need to modify the way the kernel handles printing pointers we will be better equipped to find the call sites. +Pointer Differences +------------------- + +:: + + %td 2560 + %tx a00 + +For printing the pointer differences, use the %t modifier for ptrdiff_t. + +Example:: + + printk("test: difference between pointers: %td\n", ptr2 - ptr1); + Struct Resources ---------------- |