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From:   Serge Semin <fancer.lancer@gmail.com>
To:     Ralf Baechle <ralf@linux-mips.org>,
        Paul Burton <paul.burton@mips.com>,
        James Hogan <jhogan@kernel.org>,
        Mike Rapoport <rppt@linux.ibm.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Michal Hocko <mhocko@suse.com>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Thomas Bogendoerfer <tbogendoerfer@suse.de>,
        Huacai Chen <chenhc@lemote.com>,
        Stefan Agner <stefan@agner.ch>,
        Stephen Rothwell <sfr@canb.auug.org.au>,
        Alexandre Belloni <alexandre.belloni@bootlin.com>,
        Juergen Gross <jgross@suse.com>
Cc:     Serge Semin <Sergey.Semin@t-platforms.ru>,
        linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org,
        Matt Redfearn <matt.redfearn@mips.com>
Subject: [PATCH v2 2/5] mips: Perform early low memory test
Date:   Fri,  3 May 2019 20:50:38 +0300
Message-Id: <20190503175041.7949-3-fancer.lancer@gmail.com>
In-Reply-To: <20190503175041.7949-1-fancer.lancer@gmail.com>
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memblock subsystem provides a method to optionally test the passed
memory region in case if it was requested via special kernel boot
argument. Lets add the function at the bottom of the arch_mem_init()
method. Testing at this point in the boot sequence should be safe since all
critical areas are now reserved and a minimum of allocations have been
done.

Reviewed-by: Matt Redfearn <matt.redfearn@mips.com>
Signed-off-by: Serge Semin <fancer.lancer@gmail.com>
---
 arch/mips/kernel/setup.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c
index ca493fdf69b0..fbd216b4e929 100644
--- a/arch/mips/kernel/setup.c
+++ b/arch/mips/kernel/setup.c
@@ -826,6 +826,8 @@ static void __init arch_mem_init(char **cmdline_p)
 		__pa_symbol(&__nosave_end) - __pa_symbol(&__nosave_begin));
 
 	memblock_dump_all();
+
+	early_memtest(PFN_PHYS(min_low_pfn), PFN_PHYS(max_low_pfn));
 }
 
 static void __init resource_init(void)
-- 
2.21.0