linux-kernel - [PATCH 1/2] arm64: mm: apply __ro_after_init to memory

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Date:   Wed, 15 Dec 2021 14:45:58 +0800
From:   "Peng Fan (OSS)" <peng.fan@....nxp.com>
To:     catalin.marinas@....com, will@...nel.org, rppt@...nel.org
Cc:     akpm@...ux-foundation.org, david@...hat.com,
        anshuman.khandual@....com, geert+renesas@...der.be,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-imx@....com, Peng Fan <peng.fan@....com>
Subject: [PATCH 1/2] arm64: mm: apply __ro_after_init to memory_limit

From: Peng Fan <peng.fan@....com>

This variable is only set during initialization, so mark with
__ro_after_init.

Signed-off-by: Peng Fan <peng.fan@....com>
---
 arch/arm64/mm/init.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c
index a8834434af99..db63cc885771 100644
--- a/arch/arm64/mm/init.c
+++ b/arch/arm64/mm/init.c
@@ -172,7 +172,7 @@ int pfn_is_map_memory(unsigned long pfn)
 }
 EXPORT_SYMBOL(pfn_is_map_memory);
 
-static phys_addr_t memory_limit = PHYS_ADDR_MAX;
+static phys_addr_t memory_limit __ro_after_init = PHYS_ADDR_MAX;
 
 /*
  * Limit the memory size that was specified via FDT.
-- 
2.25.1