Messages in this thread | | | From | Paul Mackerras <> | Date | Wed, 28 Nov 2001 09:02:41 +1100 (EST) | Subject | Re: 2.5.1-pre2 does not compile |
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Linus Torvalds writes:
> The next-generation block-layer support is starting to be merged into > the 2.5.x tree, and that breaks old drivers that haven't been updated to > the new locking. > > In particular, there used to be _one_ lock for the whole IO system > ("io_request_lock"), and these days it's a per-block-queue lock. > > In many cases the fix is as simple as just replacing the > "io_request_lock" with "host->host_lock", but sometimes this is > complicated by the need to pass the right data structures down far > enough..
Is there a description of the new block layer and its interface to block device drivers somewhere? That would be helpful, since Ben Herrenschmidt and I are going to have to convert several powermac-specific drivers.
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