linux-kernel - [PATCH 20/21] MIPS memblock: Add free low memory test method call

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Date:   Mon, 19 Dec 2016 05:07:45 +0300
From:   Serge Semin <fancer.lancer@...il.com>
To:     ralf@...ux-mips.org, paul.burton@...tec.com, rabinv@...s.com,
        matt.redfearn@...tec.com, james.hogan@...tec.com,
        alexander.sverdlin@...ia.com, robh+dt@...nel.org,
        frowand.list@...il.com
Cc:     Sergey.Semin@...latforms.ru, linux-mips@...ux-mips.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Serge Semin <fancer.lancer@...il.com>
Subject: [PATCH 20/21] MIPS memblock: Add free low memory test method call

Right after all the necessary reservations are done, free memory
regions can be tested if it is activated with "memtest" parameter.

Signed-off-by: Serge Semin <fancer.lancer@...il.com>
---
 arch/mips/mm/init.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/mips/mm/init.c b/arch/mips/mm/init.c
index 35e7ba8..ccc0e96 100644
--- a/arch/mips/mm/init.c
+++ b/arch/mips/mm/init.c
@@ -452,6 +452,12 @@ void maar_init(void)
 
 void __init paging_init(void)
 {
+	/*
+	 * Test low memory registered within memblock. The method shall test
+	 * valid and free memory only
+	 */
+	early_memtest(PFN_PHYS(min_low_pfn), PFN_PHYS(max_low_pfn));
+
 	/* Initialize page tables */
 	pagetable_init();
 
-- 
2.6.6