[PATCH v2 14/18] memblock: use kho_scratch_overlap() to decide migratetype

[Pratyush Yadav]

From: "Pratyush Yadav (Google)" <pratyush at kernel.org>

Support for discovering memory blocks with no preserved memory will be
added in coming patches. These areas will also be marked as
MEMBLOCK_KHO_SCRATCH to allow allocations from them.

But only the scratch areas passed to KHO should be marked as
MIGRATE_CMA, all others should be left as normal. So instead of checking
the flags on the region, ask KHO to loop through its scratch array.

Signed-off-by: Pratyush Yadav (Google) <pratyush at kernel.org>
---
 include/linux/memblock.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/linux/memblock.h b/include/linux/memblock.h
index 5afcd99aa8c1..546d7ef798b8 100644
--- a/include/linux/memblock.h
+++ b/include/linux/memblock.h
@@ -11,6 +11,7 @@
 #include <linux/init.h>
 #include <linux/mm.h>
 #include <asm/dma.h>
+#include <linux/kexec_handover.h>
 
 extern unsigned long max_low_pfn;
 extern unsigned long min_low_pfn;
@@ -618,7 +619,7 @@ bool memblock_is_kho_scratch_memory(phys_addr_t addr);
 static inline enum migratetype kho_scratch_migratetype(unsigned long pfn,
 						       enum migratetype mt)
 {
-	if (memblock_is_kho_scratch_memory(PFN_PHYS(pfn)))
+	if (kho_scratch_overlap(PFN_PHYS(pfn), pageblock_nr_pages << PAGE_SHIFT))
 		return MIGRATE_CMA;
 	return mt;
 }
-- 
2.54.0.1032.g2f8565e1d1-goog