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btrfs: optimize split page read in btrfs_get_##bits
authorDavid Sterba <dsterba@suse.com>
Thu, 30 Apr 2020 15:57:55 +0000 (17:57 +0200)
committerDavid Sterba <dsterba@suse.com>
Mon, 25 May 2020 09:25:34 +0000 (11:25 +0200)
commit84da071f3df5a9c0df0352d1c52b0c36ddb1c53f
tree9afe4d666d6c5c7ce55f2b07602f514a38866f9btree
parentc60ac0ffd682fc04f564dd6f4cc1a77c0f94608bcommit | diff
btrfs: optimize split page read in btrfs_get_##bits

The helper read_extent_buffer is called to do read of the data spanning
two extent buffer pages. As the size is known, we can do the read
directly in two steps.  This removes one function call and compiler can
optimize memcpy as the sizes are known at compile time.

Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>
fs/btrfs/struct-funcs.c diff | blob | history
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