linux-kernel - [PATCH v1] mm:Using div64_ul replaces do

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Message-Id: <20230615075127.6832-1-machel@vivo.com>
Date:   Thu, 15 Jun 2023 15:51:14 +0800
From:   Wang Ming <machel@...o.com>
To:     Mike Rapoport <rppt@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Cc:     opensource.kernel@...o.com, Wang Ming <machel@...o.com>
Subject: [PATCH v1] mm:Using div64_ul replaces do_div() function

Fix the following coccicheck warning:

mm/mm_init.c:2492:2-8: WARNING: do_div() does a
64-by-32 division, please consider using div64_ul instead.

Signed-off-by: Wang Ming <machel@...o.com>
---
 mm/mm_init.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/mm_init.c b/mm/mm_init.c
index d39363159..d92de78fb 100644
--- a/mm/mm_init.c
+++ b/mm/mm_init.c
@@ -2508,7 +2508,7 @@ void *__init alloc_large_system_hash(const char *tablename,
        /* limit allocation size to 1/16 total memory by default */
        if (max == 0) {
                max = ((unsigned long long)nr_all_pages << PAGE_SHIFT) >> 4;
-               do_div(max, bucketsize);
+               div64_ul(max, bucketsize);
        }
        max = min(max, 0x80000000ULL);

--
2.25.1

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