linux-kernel - [PATCH 3/4] arm64: mm: move memblock_clear_nomap after __add

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Message-Id: <20220711122459.13773-4-me@linux.beauty>
Date:   Mon, 11 Jul 2022 20:24:53 +0800
From:   Li Chen <me@...ux.beauty>
To:     Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Frank Rowand <frowand.list@...il.com>,
        Andrew Morton <akpm@...ux-foundation.org>
Cc:     Li Chen <lchen@...arella.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, linux-mm@...ck.org
Subject: [PATCH 3/4] arm64: mm: move memblock_clear_nomap after __add_pages

From: Li Chen <lchen@...arella.com>

I'm trying to add struct page support to nomap reserved memory,
and have skipped nomap bitmap_intersects check in fill_subsection_map,
so just move memblock_clear_nomap after __add_pages.

Signed-off-by: Li Chen <lchen@...arella.com>
Change-Id: I5e26fdc3f3e55b12f1acc1adb47fb262c4877ff3
---
 arch/arm64/mm/mmu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c
index 6680689242df..2e7f503837e4 100644
--- a/arch/arm64/mm/mmu.c
+++ b/arch/arm64/mm/mmu.c
@@ -1537,10 +1537,10 @@ int arch_add_memory(int nid, u64 start, u64 size,
 			     size, params->pgprot, __pgd_pgtable_alloc,
 			     flags);
 
-	memblock_clear_nomap(start, size);
 
 	ret = __add_pages(nid, start >> PAGE_SHIFT, size >> PAGE_SHIFT,
 			   params);
+	memblock_clear_nomap(start, size);
 	if (ret)
 		__remove_pgd_mapping(swapper_pg_dir,
 				     __phys_to_virt(start), size);
-- 
2.25.1