Some architectures (like s390, microblaze and etc...) require size
of the first memory region. This patch provides new memblock_first_region_size()
helper for this case.
Signed-off-by: Alexander Kuleshov <kuleshovmail@xxxxxxxxx>
---
include/linux/memblock.h | 1 +
mm/memblock.c | 5 +++++
2 files changed, 6 insertions(+)
diff --git a/include/linux/memblock.h b/include/linux/memblock.h
index cc4b019..8a481e5 100644
--- a/include/linux/memblock.h
+++ b/include/linux/memblock.h
@@ -319,6 +319,7 @@ phys_addr_t memblock_phys_mem_size(void);
phys_addr_t memblock_mem_size(unsigned long limit_pfn);
phys_addr_t memblock_start_of_DRAM(void);
phys_addr_t memblock_end_of_DRAM(void);
+phys_addr_t memblock_first_region_size(void);
void memblock_enforce_memory_limit(phys_addr_t memory_limit);
int memblock_is_memory(phys_addr_t addr);
int memblock_is_region_memory(phys_addr_t base, phys_addr_t size);
diff --git a/mm/memblock.c b/mm/memblock.c
index 87108e7..fb4b7ca 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -1463,6 +1463,11 @@ phys_addr_t __init_memblock memblock_end_of_DRAM(void)
return (memblock.memory.regions[idx].base + memblock.memory.regions[idx].size);
}
+phys_addr_t __init_memblock memblock_first_region_size(void)
+{
+ return memblock.memory.regions[0].size;
+}
+
void __init memblock_enforce_memory_limit(phys_addr_t limit)
{
phys_addr_t max_addr = (phys_addr_t)ULLONG_MAX;
--
2.5.0
--
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