memcg: replace in_interrupt() with !in_task()

Replace the deprecated in_interrupt() with !in_task() because
in_interrupt() returns true for BH disabled even if the call happens in
the task context.  in_task() is the right interface to differentiate
task context from NMI, hard IRQ and softirq contexts.

Link: https://lkml.kernel.org/r/20220127162636.3461256-1-shakeelb@google.com
Signed-off-by: Shakeel Butt <shakeelb@google.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Vasily Averin <vvs@virtuozzo.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Author: shakeelb

mm/memcontrol.c

@@ -2688,7 +2688,7 @@ static int try_charge_memcg(struct mem_cgroup *memcg, gfp_t gfp_mask,
 			READ_ONCE(memcg->swap.high);
 
 		/* Don't bother a random interrupted task */
-		if (in_interrupt()) {
+		if (!in_task()) {
 			if (mem_high) {
 				schedule_work(&memcg->high_work);
 				break;
@@ -6968,7 +6968,7 @@ void mem_cgroup_sk_alloc(struct sock *sk)
 		return;
 
 	/* Do not associate the sock with unrelated interrupted task's memcg. */
-	if (in_interrupt())
+	if (!in_task())
 		return;
 
 	rcu_read_lock();