This patchset clean-up and optimize highmem related code.
Change from v1
Rebase on v3.7-rc3
[4] Instead of returning index of last flushed entry, return first index.
And update last_pkmap_nr to this index to optimize more.
Summary for v1
[1] is just clean-up and doesn't introduce any functional change.
[2-3] are for clean-up and optimization.
These eliminate an useless lock opearation and list management.
[4-5] is for optimization related to flush_all_zero_pkmaps().
Joonsoo Kim (5):
mm, highmem: use PKMAP_NR() to calculate an index of pkmap
mm, highmem: remove useless pool_lock
mm, highmem: remove page_address_pool list
mm, highmem: makes flush_all_zero_pkmaps() return index of first
flushed entry
mm, highmem: get virtual address of the page using PKMAP_ADDR()
include/linux/highmem.h | 1 +
mm/highmem.c | 108 ++++++++++++++++++++++-------------------------
2 files changed, 51 insertions(+), 58 deletions(-)
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1.7.9.5
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