mm: do not show fs mm pc for VM_LOCKONFAULT pages
authorJason A. Donenfeld <Jason@zx2c4.com>
Mon, 5 Dec 2022 17:30:07 +0000 (18:30 +0100)
committerAndrew Morton <akpm@linux-foundation.org>
Mon, 12 Dec 2022 02:12:21 +0000 (18:12 -0800)
commit8614d6c5eda005ad72b37afeaae2879d7c101b18
tree0d710df89a23714a4f54dac444e8148ba84ef07e
parent9d789c3b4170574baa4242dd8cae5988cf97d48d
mm: do not show fs mm pc for VM_LOCKONFAULT pages

When VM_LOCKONFAULT was added, /proc/PID/smaps wasn't hooked up to it, so
looking at /proc/PID/smaps, it shows '??' instead of something
intelligable.  This can be reached by userspace by simply calling
`mlock2(..., MLOCK_ONFAULT);`.

Fix this by adding "lf" to denote VM_LOCKONFAULT.

Link: https://lkml.kernel.org/r/20221205173007.580210-1-Jason@zx2c4.com
Fixes: de60f5f10c58 ("mm: introduce VM_LOCKONFAULT")
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Eric B Munson <emunson@akamai.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
fs/proc/task_mmu.c