linux-kernel - [PATCH] memblock: Return NUMA_NO_NODE instead of -1 to improve code readability

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Message-ID: <20231207131001.224914-1-ytcoode@gmail.com>
Date:   Thu,  7 Dec 2023 21:10:01 +0800
From:   Yuntao Wang <ytcoode@...il.com>
To:     linux-kernel@...r.kernel.org, linux-mm@...ck.org
Cc:     Mike Rapoport <rppt@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Yuntao Wang <ytcoode@...il.com>
Subject: [PATCH] memblock: Return NUMA_NO_NODE instead of -1 to improve code readability

When no corresponding memory region is found for the given pfn, return
NUMA_NO_NODE instead of -1. This improves code readability and aligns with
the existing logic of the memblock_search_pfn_nid() function's user.

Signed-off-by: Yuntao Wang <ytcoode@...il.com>
---
 mm/memblock.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/memblock.c b/mm/memblock.c
index 5a88d6d24d79..c1f579c23396 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -1851,7 +1851,7 @@ int __init_memblock memblock_search_pfn_nid(unsigned long pfn,
 	int mid = memblock_search(type, PFN_PHYS(pfn));
 
 	if (mid == -1)
-		return -1;
+		return NUMA_NO_NODE;
 
 	*start_pfn = PFN_DOWN(type->regions[mid].base);
 	*end_pfn = PFN_DOWN(type->regions[mid].base + type->regions[mid].size);
-- 
2.43.0