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We only support filesystems that have v2 directory support, and than
means all the checking and handling of superblock versions prior to
this support being added is completely unnecessary overhead.
Strip out all the version 1-3 support, sanitise the good version
checking to reflect the supported versions, update all the feature
supported functions and clean up all the support bit definitions to
reflect the fact that we no longer care about Irix bootloader flag
regions for v4 feature bits. Also, convert the return values to
boolean types and remove typedefs from function declarations to
clean up calling conventions, too.
Because the feature bit checking is all inline code, this relatively
small cleanup has a noticable impact on code size:
text data bss dec hex filename
785195 100867 616 886678 d8796 fs/xfs/xfs.o.orig
783595 100867 616 885078 d8156 fs/xfs/xfs.o.patched
i.e. it reduces it by 1600 bytes.
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dave Chinner <david@fromorbit.com>