[PATCH 0/3] btrfs: Convert kmap/memset/kunmap to memzero_user()

[ira . weiny]

From: Ira Weiny <ira.weiny@xxxxxxxxx>

Previously this was submitted to convert to zero_user()[1].  zero_user() is not
the same as memzero_user() and in fact some zero_user() calls may be better off
as memzero_user().  Regardless it was incorrect to convert btrfs to
zero_user().

This series corrects this by lifting memzero_user(), converting it to
kmap_local_page(), and then using it in btrfs.

Thanks,
Ira

[1] https://lore.kernel.org/lkml/20210223192506.GY3014244@xxxxxxxxxxxxxxxxxxxxxxxxx/


Ira Weiny (3):
  iov_iter: Lift memzero_page() to highmem.h
  mm/highmem: Convert memzero_page() to kmap_local_page()
  btrfs: Use memzero_page() instead of open coded kmap pattern

 fs/btrfs/compression.c  |  5 +----
 fs/btrfs/extent_io.c    | 22 ++++------------------
 fs/btrfs/inode.c        | 33 ++++++++++-----------------------
 fs/btrfs/reflink.c      |  6 +-----
 fs/btrfs/zlib.c         |  5 +----
 fs/btrfs/zstd.c         |  5 +----
 include/linux/highmem.h |  7 +++++++
 lib/iov_iter.c          |  8 +-------
 8 files changed, 26 insertions(+), 65 deletions(-)

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2.28.0.rc0.12.gb6a658bd00c9