[PATCH v5 1/4] memblock: Introduce memblock_mem_range_remove_map()

From: Tiezhu Yang <yangtiezhu@loongson.cn>
To: Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
	Mike Rapoport <rppt@kernel.org>,
	Andrew Morton <akpm@linux-foundation.org>
Cc: Xuefeng Li <lixuefeng@loongson.cn>,
	linux-mips@vger.kernel.org, linux-mm@kvack.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH v5 1/4] memblock: Introduce memblock_mem_range_remove_map()
Date: Sat,  5 Mar 2022 14:21:26 +0800	[thread overview]
Message-ID: <1646461289-31992-2-git-send-email-yangtiezhu@loongson.cn> (raw)
In-Reply-To: <1646461289-31992-1-git-send-email-yangtiezhu@loongson.cn>

This is preparation for supporting mem=limit@base and memmap=limit@base
parameters, no functionality change.

Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
---
 include/linux/memblock.h | 1 +
 mm/memblock.c            | 9 +++++++--
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/include/linux/memblock.h b/include/linux/memblock.h
index 50ad196..e558d2c 100644
--- a/include/linux/memblock.h
+++ b/include/linux/memblock.h
@@ -482,6 +482,7 @@ phys_addr_t memblock_end_of_DRAM(void);
 void memblock_enforce_memory_limit(phys_addr_t memory_limit);
 void memblock_cap_memory_range(phys_addr_t base, phys_addr_t size);
 void memblock_mem_limit_remove_map(phys_addr_t limit);
+void memblock_mem_range_remove_map(phys_addr_t base, phys_addr_t limit);
 bool memblock_is_memory(phys_addr_t addr);
 bool memblock_is_map_memory(phys_addr_t addr);
 bool memblock_is_region_memory(phys_addr_t base, phys_addr_t size);
diff --git a/mm/memblock.c b/mm/memblock.c
index 1018e50..2476d15d 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -1723,7 +1723,7 @@ void __init memblock_cap_memory_range(phys_addr_t base, phys_addr_t size)
 			base + size, PHYS_ADDR_MAX);
 }
 
-void __init memblock_mem_limit_remove_map(phys_addr_t limit)
+void __init memblock_mem_range_remove_map(phys_addr_t base, phys_addr_t limit)
 {
 	phys_addr_t max_addr;
 
@@ -1736,7 +1736,12 @@ void __init memblock_mem_limit_remove_map(phys_addr_t limit)
 	if (max_addr == PHYS_ADDR_MAX)
 		return;
 
-	memblock_cap_memory_range(0, max_addr);
+	memblock_cap_memory_range(base, max_addr);
+}
+
+void __init memblock_mem_limit_remove_map(phys_addr_t limit)
+{
+	memblock_mem_range_remove_map(0, limit);
 }
 
 static int __init_memblock memblock_search(struct memblock_type *type, phys_addr_t addr)
-- 
2.1.0

