+ mm-vmstat-skip-nr_tlb_remote_flush-properly.patch added to -mm tree

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The patch titled
     Subject: mm/vmstat.c: skip NR_TLB_REMOTE_FLUSH* properly
has been added to the -mm tree.  Its filename is
     mm-vmstat-skip-nr_tlb_remote_flush-properly.patch

This patch should soon appear at
    http://ozlabs.org/~akpm/mmots/broken-out/mm-vmstat-skip-nr_tlb_remote_flush-properly.patch
and later at
    http://ozlabs.org/~akpm/mmotm/broken-out/mm-vmstat-skip-nr_tlb_remote_flush-properly.patch

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------------------------------------------------------
From: Jann Horn <jannh@xxxxxxxxxx>
Subject: mm/vmstat.c: skip NR_TLB_REMOTE_FLUSH* properly

5dd0b16cdaff ("mm/vmstat: Make NR_TLB_REMOTE_FLUSH_RECEIVED available even
on UP") made the availability of the NR_TLB_REMOTE_FLUSH* counters inside
the kernel unconditional to reduce #ifdef soup, but (either to avoid
showing dummy zero counters to userspace, or because that code was missed)
didn't update the vmstat_array, meaning that all following counters would
be shown with incorrect values.

This only affects kernel builds with
CONFIG_VM_EVENT_COUNTERS=y && CONFIG_DEBUG_TLBFLUSH=y && CONFIG_SMP=n.

Link: http://lkml.kernel.org/r/20181001143138.95119-2-jannh@xxxxxxxxxx
Fixes: 5dd0b16cdaff ("mm/vmstat: Make NR_TLB_REMOTE_FLUSH_RECEIVED available even on UP")
Signed-off-by: Jann Horn <jannh@xxxxxxxxxx>
Reviewed-by: Kees Cook <keescook@xxxxxxxxxxxx>
Reviewed-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Davidlohr Bueso <dave@xxxxxxxxxxxx>
Cc: Oleg Nesterov <oleg@xxxxxxxxxx>
Cc: Christoph Lameter <clameter@xxxxxxx>
Cc: Roman Gushchin <guro@xxxxxx>
Cc: Kemi Wang <kemi.wang@xxxxxxxxx>
Cc: Andy Lutomirski <luto@xxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---

 mm/vmstat.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/mm/vmstat.c~mm-vmstat-skip-nr_tlb_remote_flush-properly
+++ a/mm/vmstat.c
@@ -1275,6 +1275,9 @@ const char * const vmstat_text[] = {
 #ifdef CONFIG_SMP
 	"nr_tlb_remote_flush",
 	"nr_tlb_remote_flush_received",
+#else
+	"", /* nr_tlb_remote_flush */
+	"", /* nr_tlb_remote_flush_received */
 #endif /* CONFIG_SMP */
 	"nr_tlb_local_flush_all",
 	"nr_tlb_local_flush_one",
_

Patches currently in -mm which might be from jannh@xxxxxxxxxx are

proc-restrict-kernel-stack-dumps-to-root.patch
mm-vmstat-fix-outdated-vmstat_text.patch
mm-vmstat-skip-nr_tlb_remote_flush-properly.patch
mm-vmstat-assert-that-vmstat_text-is-in-sync-with-stat_items_size.patch
reiserfs-propagate-errors-from-fill_with_dentries-properly.patch




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