linux-kernel - [PATCH 1/2] drivers/base/memory: Simplify add_boot_memory

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Message-ID: <20250214063504.617906-2-gshan@redhat.com>
Date: Fri, 14 Feb 2025 16:35:03 +1000
From: Gavin Shan <gshan@...hat.com>
To: linux-mm@...ck.org
Cc: linux-kernel@...r.kernel.org,
	david@...hat.com,
	osalvador@...e.de,
	gregkh@...uxfoundation.org,
	rafael@...nel.org,
	dakr@...nel.org,
	akpm@...ux-foundation.org
Subject: [PATCH 1/2] drivers/base/memory: Simplify add_boot_memory_block()

It's unnecessary to keep the variable @section_count in the function
because the device for the specific memory block will be added if
any of its memory section is present. The variable @section_count
records the number of present memory sections in the specific memory
block, which isn't needed.

Simplify the function by dropping the variable @section_count. No
functional change intended.

Signed-off-by: Gavin Shan <gshan@...hat.com>
---
 drivers/base/memory.c | 15 +++++++--------
 1 file changed, 7 insertions(+), 8 deletions(-)

diff --git a/drivers/base/memory.c b/drivers/base/memory.c
index 348c5dbbfa68..208b9b544012 100644
--- a/drivers/base/memory.c
+++ b/drivers/base/memory.c
@@ -822,18 +822,17 @@ static int add_memory_block(unsigned long block_id, unsigned long state,
 
 static int __init add_boot_memory_block(unsigned long base_section_nr)
 {
-	int section_count = 0;
 	unsigned long nr;
 
 	for (nr = base_section_nr; nr < base_section_nr + sections_per_block;
-	     nr++)
-		if (present_section_nr(nr))
-			section_count++;
+	     nr++) {
+		if (present_section_nr(nr)) {
+			return add_memory_block(memory_block_id(base_section_nr),
+						MEM_ONLINE, NULL, NULL);
+		}
+	}
 
-	if (section_count == 0)
-		return 0;
-	return add_memory_block(memory_block_id(base_section_nr),
-				MEM_ONLINE, NULL,  NULL);
+	return 0;
 }
 
 static int add_hotplug_memory_block(unsigned long block_id,
-- 
2.48.1