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Subject[PATCH 4.12 042/106] ARM: mvebu: use __pa_symbol in the mv98dx3236 platform SMP code
Date
4.12-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Gregory CLEMENT <gregory.clement@free-electrons.com>

commit 76127d6fe00062bddb25515d8a4f44633c41fe14 upstream.

As we already did for Armada XP switch from virt_to_phys() to
__pa_symbol().

The reason for it was well explained by Mark Rutland so let's quote him:

"virt_to_phys() is intended to operate on the linear/direct mapping of
RAM.

__pa_symbol() is intended to operate on the kernel mapping, which may
not be in the linear/direct mapping on all architectures. e.g. arm64 and
x86_64 map the kernel image and RAM separately.

On 32-bit ARM the kernel image mapping is tied to the linear/direct
mapping, so that works, but as it's semantically wrong (and broken for
generic code), the DEBUG_VIRTUAL checks complain."

Fixes: db88977894ab ("arm: mvebu: support for SMP on 98DX3336 SoC")
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Tested-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
arch/arm/mach-mvebu/platsmp.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/arm/mach-mvebu/platsmp.c
+++ b/arch/arm/mach-mvebu/platsmp.c
@@ -211,7 +211,7 @@ static int mv98dx3236_resume_set_cpu_boo
return PTR_ERR(base);

writel(0, base + MV98DX3236_CPU_RESUME_CTRL_REG);
- writel(virt_to_phys(boot_addr), base + MV98DX3236_CPU_RESUME_ADDR_REG);
+ writel(__pa_symbol(boot_addr), base + MV98DX3236_CPU_RESUME_ADDR_REG);

iounmap(base);


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