From: Ira Weiny <ira.weiny@xxxxxxxxx> Changes from V1: Rework commit messages because they were very weak Change 'fs/btrfs: X' to 'btrfs: x' https://lore.kernel.org/lkml/20210209151442.GU1993@xxxxxxx/ Per Andrew Split out changes to highmem.h The addition memcpy, memmove, and memset page functions The change from kmap_atomic to kmap_local_page The addition of BUG_ON The conversion of memzero_page to zero_user in iov_iter Change BUG_ON to VM_BUG_ON While we are refactoring adjust the line length down per Chaitany There are many places where kmap/<operation>/kunmap patterns occur. We lift a couple of these patterns to the core common functions and use them as well as existing core functions in the btrfs file system. At the same time we convert those core functions to use kmap_local_page() which is more efficient in those calls. Per the conversation on V1 it looks like Andrew would like this to go through the btrfs tree. I think that is fine. The other users of memcpy_[to|from]_page are probably not ready and I believe could be taken in an early rc after David submits. Is that ok with you David? Thanks, Ira Ira Weiny (8): mm/highmem: Lift memcpy_[to|from]_page to core mm/highmem: Convert memcpy_[to|from]_page() to kmap_local_page() mm/highmem: Introduce memcpy_page(), memmove_page(), and memset_page() mm/highmem: Add VM_BUG_ON() to mem*_page() calls iov_iter: Remove memzero_page() in favor of zero_user() btrfs: use memcpy_[to|from]_page() and kmap_local_page() btrfs: use copy_highpage() instead of 2 kmaps() btrfs: convert to zero_user() fs/btrfs/compression.c | 11 +++----- fs/btrfs/extent_io.c | 22 +++------------- fs/btrfs/inode.c | 33 ++++++++---------------- fs/btrfs/lzo.c | 4 +-- fs/btrfs/raid56.c | 10 +------- fs/btrfs/reflink.c | 12 ++------- fs/btrfs/send.c | 7 ++---- fs/btrfs/zlib.c | 10 +++----- fs/btrfs/zstd.c | 11 +++----- include/linux/highmem.h | 56 +++++++++++++++++++++++++++++++++++++++++ lib/iov_iter.c | 26 +++---------------- 11 files changed, 89 insertions(+), 113 deletions(-) -- 2.28.0.rc0.12.gb6a658bd00c9
