mm/vmscan: pass NULL to trace vmscan node reclaim

The tracepoint for node relcaims takes a `struct mem_cgroup *`
as the third argument, so pass NULL instead of 0 to fix warning
about using an integer as a pointer.

Fixes the following warnings:

mm/vmscan.c:6753:66: warning: Using plain integer as NULL pointer
mm/vmscan.c:6757:58: warning: Using plain integer as NULL pointer
mm/vmscan.c:7818:60: warning: Using plain integer as NULL pointer

Link: https://lore.kernel.org/20260616095906.210016-1-ben.dooks@codethink.co.uk
Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/mm/vmscan.c b/mm/vmscan.c
index 299b5d9e8836573883f7887857c67d397ca521ae..8190c4abec84186b1b0064972e2d0d3ef245f557 100644 (file)
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -6706,11 +6706,11 @@ unsigned long try_to_free_pages(struct zonelist *zonelist, int order,
                return 1;
 
        set_task_reclaim_state(current, &sc.reclaim_state);
-       trace_mm_vmscan_direct_reclaim_begin(sc.gfp_mask, order, 0);
+       trace_mm_vmscan_direct_reclaim_begin(sc.gfp_mask, order, NULL);
 
        nr_reclaimed = do_try_to_free_pages(zonelist, &sc);
 
-       trace_mm_vmscan_direct_reclaim_end(nr_reclaimed, 0);
+       trace_mm_vmscan_direct_reclaim_end(nr_reclaimed, NULL);
        set_task_reclaim_state(current, NULL);
 
        return nr_reclaimed;
@@ -7776,7 +7776,7 @@ static unsigned long __node_reclaim(struct pglist_data *pgdat, gfp_t gfp_mask,
        delayacct_freepages_end();
        psi_memstall_leave(&pflags);
 
-       trace_mm_vmscan_node_reclaim_end(sc->nr_reclaimed, 0);
+       trace_mm_vmscan_node_reclaim_end(sc->nr_reclaimed, NULL);
 
        return sc->nr_reclaimed;
 }