mm: Remove the PFN busy warning

raspberrypi inclusion
category: feature
bugzilla: 50432

--------------------------------

See commit dae803e1 -- the warning is
expected sometimes when using CMA.  However, that commit still spams
my kernel log with these warnings.
Signed-off-by: NEric Anholt <eric@anholt.net>
Signed-off-by: NFang Yafen <yafen@iscas.ac.cn>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

mm/page_alloc.c

@@ -8578,8 +8578,6 @@ int alloc_contig_range(unsigned long start, unsigned long end,
 
 	/* Make sure the range is really isolated. */
 	if (test_pages_isolated(outer_start, end, 0)) {
-		pr_info_ratelimited("%s: [%lx, %lx) PFNs busy\n",
-			__func__, outer_start, end);
 		ret = -EBUSY;
 		goto done;
 	}