b_end_io

Peter T. Breuer (ptb@it.uc3m.es)
Thu, 2 Dec 1999 22:05:31 +0100 (MET)

Can anyone tell me where the default bh->b_end_io value is set in 2.2.*
kernels? (it's the "end buffer io" function in the buffer heads).

I can only find init_buffer that seems to set it, and nowhere can I
find init_buffer used in the block devices or fs hierarchy. Yet
bh->b_end_io must be set everywhere because it's used in the default
end_request.

It's a mystery!

On a similar note, if anyone knows if the OO feature of an b_end_io
function per buffer_head is used anywhere in 2.2.*? I can understand it
being per device, but can't see a per b/h usage anywhere. Can I assume
that there is only one b_end_io per device?

Peter

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