• David Sterba's avatar
    btrfs: detect fast implementation of crc32c on all architectures · 9b4e675a
    David Sterba authored
    Currently, there's only check for fast crc32c implementation on X86,
    based on the CPU flags. This is used to decide if checksumming should be
    offloaded to worker threads or can be calculated by the caller.
    
    As there are more architectures that implement a faster version of
    crc32c (ARM, SPARC, s390, MIPS, PowerPC), also there are specialized hw
    cards.
    
    The detection is based on driver name, all generic C implementations
    contain 'generic', while the specialized versions do not. Alternatively
    the priority could be used, but this is not currently provided by the
    crypto API.
    
    The flag is set per-filesystem at mount time and used for the offloading
    decisions.
    Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
    9b4e675a
ctree.h 130 KB