[PATCH] ARM: mm: sync zone_sizes_init with free_area_init

[Doug Berger]

The arm architecture does not invoke the common function
free_area_init(). Instead for non-NUMA builds it invokes
free_area_init_node() directly from zone_sizes_init().

As a result recent changes in free_area_init() are not
picked up by arm architecture builds.

This commit adds the updates to the zone_sizes_init()
function to achieve parity with the free_area_init()
functionality.

Fixes: 35fd1eb1e821 ("mm/sparse: abstract sparse buffer allocations")
Signed-off-by: Doug Berger <opendmb@xxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
---
 arch/arm/mm/init.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index 6f19ba53fd1f..4f171d834c60 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -169,6 +169,7 @@ static void __init zone_sizes_init(unsigned long
min, unsigned long max_low,
                        arm_dma_zone_size >> PAGE_SHIFT);
 #endif

+       zero_resv_unavail();
        free_area_init_node(0, zone_size, min, zhole_size);
 }

-- 
2.7.4

I am unclear of the mechanics for submitting such a stable patch when it
represents a perhaps less than obvious sliver of the upstream commit
that fixes the issue, so I am soliciting guidance with this email.

Thank you for taking the time to read this far, and please let me know
how I can improve the situation,
    Doug