cgroup: Use %p for pointer formatting

Since ad67b74d2469 ("printk: hash addresses printed with %p") %p is hashed
by default, which is also what %pK prints under the default kptr_restrict=0.
Converting the remaining %pK users makes it possible to remove its handling
from vsprintf.

Documentation/process/deprecated.rst asks that no new %p uses be added, but
these pointers are what makes the css_set debug output useful, and debug.c
already prints css pointers with %p. Keep the pointer output and use %p.

Under kptr_restrict=1 and 2 the files now show the same hashed values as any
other %p output: unprivileged readers see hashes instead of zeros, and a
CAP_SYSLOG reader under kptr_restrict=1 no longer gets raw addresses.
Booting with hash_pointers=never is the remaining way to see them.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Acked-by: Michal Koutný <mkoutny@suse.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

0 files changed, 0 insertions, 0 deletions