This series contains cleanups to remove __section_nr(). When CONFIG_SPARSEMEM_EXTREME is enabled, __section_nr() could be costly since it iterates all section roots to check if the given mem_section is in its range. On the other hand, __nr_to_section which converts section_nr to mem_section can be done in O(1). The only users of __section_nr() was section_mark_present() and find_memory_block(). PATCH 1 & 2 changes both functions to use section_nr instead of mem_section. PATCH 3 finally removes __section_nr() function. More details can be found in each changelogs. Ohhoon Kwon (3): mm: sparse: pass section_nr to section_mark_present mm: sparse: pass section_nr to find_memory_block mm: sparse: remove __section_nr() function .../platforms/pseries/hotplug-memory.c | 4 +-- drivers/base/memory.c | 4 +-- include/linux/memory.h | 2 +- include/linux/mmzone.h | 1 - mm/sparse.c | 35 +++---------------- 5 files changed, 9 insertions(+), 37 deletions(-) -- 2.17.1
