mm, oom: keep oom_adj under or at upper limit when printing

For oom_score_adj values in the range [942,999], the current
calculations will print 16 for oom_adj. This patch simply limits the
output so output is inline with docs.

Signed-off-by: Charles Haithcock <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Acked-by: Michal Hocko <[e-mail]>
Cc: Alexey Dobriyan <[e-mail]>
Link: https://lkml.kernel.org/r/[e-mail]
Signed-off-by: Linus Torvalds <[e-mail]>

fs/proc/base.c

···
 		oom_adj = (task->signal->oom_score_adj * -OOM_DISABLE) /
 			  OOM_SCORE_ADJ_MAX;
 	put_task_struct(task);
+	if (oom_adj > OOM_ADJUST_MAX)
+		oom_adj = OOM_ADJUST_MAX;
 	len = snprintf(buffer, sizeof(buffer), "%d\n", oom_adj);
 	return simple_read_from_buffer(buf, count, ppos, buffer, len);
 }