Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 156383b1 authored by Joel Stanley's avatar Joel Stanley Committed by Jonathan Corbet
Browse files

Documentation: Mention why %p prints ptrval 



When debugging recent kernels, people will see '(ptrval)' but there
isn't much information as to what that means. Briefly describe why it's
there.

Signed-off-by: default avatarJoel Stanley <joel@jms.id.au>
Acked-by: default avatarTobin C. Harding <me@tobin.cc>
Signed-off-by: default avatarJonathan Corbet <corbet@lwn.net>
parent bf02d491

Documentation/core-api/printk-formats.rst

+2 −2
Original line number Diff line number Diff line
@@ -60,8 +60,8 @@ Plain Pointers 
Pointers printed without a specifier extension (i.e unadorned %p) are

hashed to prevent leaking information about the kernel memory layout. This

has the added benefit of providing a unique identifier. On 64-bit machines

the first 32 bits are zeroed. If you *really* want the address see %px

below.

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.



Symbols/Function Pointers

-------------------------