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Diffstat (limited to 'Documentation/core-api/printk-formats.rst')
| -rw-r--r-- | Documentation/core-api/printk-formats.rst | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/Documentation/core-api/printk-formats.rst b/Documentation/core-api/printk-formats.rst index ecbebf4ca8e7..050f34f3a70f 100644 --- a/Documentation/core-api/printk-formats.rst +++ b/Documentation/core-api/printk-formats.rst @@ -79,6 +79,18 @@ has the added benefit of providing a unique identifier. On 64-bit machines the first 32 bits are zeroed. The kernel will print ``(ptrval)`` until it gathers enough entropy. If you *really* want the address see %px below. +Error Pointers +-------------- + +:: + + %pe -ENOSPC + +For printing error pointers (i.e. a pointer for which IS_ERR() is true) +as a symbolic error name. Error values for which no symbolic name is +known are printed in decimal, while a non-ERR_PTR passed as the +argument to %pe gets treated as ordinary %p. + Symbols/Function Pointers ------------------------- |