[PATCH v3 0/2] Replace kmap() with kmap_local_page() in zstd.c

[Fabio M. De Francesco]

This is a little series which serves the purpose to replace kmap() with
kmap_local_page() in btrfs/zstd.c. Actually this task is only
accomplished in patch 2/2. 

Instead patch 1/2 is a pre-requisite for the above-mentioned replacement,
but, above all else, it has the purpose to conform the prototypes of
__kunmap_{local,atomic}() to their own semantic. Since those functions
don't make changes to the memory pointed by their arguments, make those
arguments take pointers to const void.

This little series has version number 3, despite it's the first time the
two component patches have been re-united in a series. This may be a
questionable choice, however patch 1/2 should be at its v3 and patch 2/2
should be at its v2. I've tried to preserve the logs of version changes,
so, as said, this new series carries v3.

Fabio M. De Francesco (2):
  highmem: Make __kunmap_{local,atomic}() take "const void *"
  btrfs: Replace kmap() with kmap_local_page() in zstd.c

 arch/parisc/include/asm/cacheflush.h |  6 ++--
 arch/parisc/kernel/cache.c           |  2 +-
 fs/btrfs/zstd.c                      | 42 +++++++++++++++-------------
 include/linux/highmem-internal.h     | 10 +++----
 mm/highmem.c                         |  2 +-
 5 files changed, 33 insertions(+), 29 deletions(-)

-- 
2.36.1