#ifndef _ASM_POWERPC_SPARSEMEM_H
#define _ASM_POWERPC_SPARSEMEM_H 1
#ifdef __KERNEL__

#ifdef CONFIG_SPARSEMEM
/*
 * SECTION_SIZE_BITS		2^N: how big each section will be
 * MAX_PHYSADDR_BITS		2^N: how much physical address space we have
 * MAX_PHYSMEM_BITS		2^N: how much memory we can have in that space
 */
#define SECTION_SIZE_BITS       28

#define MAX_PHYSADDR_BITS       44
#define MAX_PHYSMEM_BITS        44

#endif /* CONFIG_SPARSEMEM */

#ifdef CONFIG_MEMORY_HOTPLUG
extern void create_section_mapping(unsigned long start, unsigned long end);
extern int remove_section_mapping(unsigned long start, unsigned long end);
#ifdef CONFIG_NUMA
extern int hot_add_scn_to_nid(unsigned long scn_addr);
#else
static inline int hot_add_scn_to_nid(unsigned long scn_addr)
{
	return 0;
}
#endif /* CONFIG_NUMA */
#endif /* CONFIG_MEMORY_HOTPLUG */

#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_SPARSEMEM_H */

#ifndef _ASM_POWERPC_SPARSEMEM_H
#define _ASM_POWERPC_SPARSEMEM_H 1
#ifdef __KERNEL__

#ifdef CONFIG_SPARSEMEM
/*
 * SECTION_SIZE_BITS		2^N: how big each section will be
 * MAX_PHYSADDR_BITS		2^N: how much physical address space we have
 * MAX_PHYSMEM_BITS		2^N: how much memory we can have in that space
 */
#define SECTION_SIZE_BITS       24

#define MAX_PHYSADDR_BITS       44
#define MAX_PHYSMEM_BITS        44

#endif /* CONFIG_SPARSEMEM */

#ifdef CONFIG_MEMORY_HOTPLUG
extern void create_section_mapping(unsigned long start, unsigned long end);
extern int remove_section_mapping(unsigned long start, unsigned long end);
#ifdef CONFIG_NUMA
extern int hot_add_scn_to_nid(unsigned long scn_addr);
#else
static inline int hot_add_scn_to_nid(unsigned long scn_addr)
{
	return 0;
}
#endif /* CONFIG_NUMA */
#endif /* CONFIG_MEMORY_HOTPLUG */

#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_SPARSEMEM_H */

Revert "powerpc/mm: Bump SECTION_SIZE_BITS from 16MB to 256MB"
Revert "powerpc/mm: Bump SECTION_SIZE_BITS from 16MB to 256MB"

This reverts commit 7545ba6f82924d4523f8f8a2baf2e517a750265d.

It breaks eHEA among other issues
