[PATCH 4.14 65/70] percpu: stop printing kernel addresses

Greg Kroah-Hartman
2019-04-24T17:51:34Z

From: Matteo Croce <mcroce@redhat.com>

commit 00206a69ee32f03e6f40837684dcbe475ea02266 upstream.

Since commit ad67b74d2469d9b8 ("printk: hash addresses printed with %p"),
at boot "____ptrval____" is printed instead of actual addresses:

percpu: Embedded 38 pages/cpu @(____ptrval____) s124376 r0 d31272 u524288

Instead of changing the print to "%px", and leaking kernel addresses,
just remove the print completely, cfr. e.g. commit 071929dbdd865f77
("arm64: Stop printing the virtual memory layout").

Signed-off-by: Matteo Croce <mcroce@redhat.com>
Signed-off-by: Dennis Zhou <dennis@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
mm/percpu.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)

--- a/mm/percpu.c
+++ b/mm/percpu.c
@@ -2507,8 +2507,8 @@ int __init pcpu_embed_first_chunk(size_t
ai->groups[group].base_offset = areas[group] - base;
}

- pr_info("Embedded %zu pages/cpu @%p s%zu r%zu d%zu u%zu\n",
- PFN_DOWN(size_sum), base, ai->static_size, ai->reserved_size,
+ pr_info("Embedded %zu pages/cpu s%zu r%zu d%zu u%zu\n",
+ PFN_DOWN(size_sum), ai->static_size, ai->reserved_size,
ai->dyn_size, ai->unit_size);

rc = pcpu_setup_first_chunk(ai, base);
@@ -2629,8 +2629,8 @@ int __init pcpu_page_first_chunk(size_t
}

/* we're ready, commit */
- pr_info("%d %s pages/cpu @%p s%zu r%zu d%zu\n",
- unit_pages, psize_str, vm.addr, ai->static_size,
+ pr_info("%d %s pages/cpu s%zu r%zu d%zu\n",
+ unit_pages, psize_str, ai->static_size,
ai->reserved_size, ai->dyn_size);

rc = pcpu_setup_first_chunk(ai, vm.addr);