Messages in this thread |  | | | Date | Fri, 11 Feb 2000 19:50:08 +0100 | | From | Philipp Rumpf <> | | Subject | Re: [PATCH] isa_{read,write}{w,l} fixed |
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> I've fixed several drivers that do that. It doesnt work because structure > padding goes and bites the idiots who do this. Also a struct pointer isnt
I'm pretty sure it's a reasonably safe assumption gcc doesn't reorder members of structs as long as they are naturally aligned - otherwise I assume structs used for DMA would need to be fixed, too ?
> capable of representing the entire physical address of some boxes - it can > hit the full ISA address space sure.
For PCI, what ioremap() returns is a pointer type (it is not necessarily a valid pointer, of course), so all mapped I/O addresses are representable by a structure pointer (unless we had a really broken ABI where certain void * couldn't be cast to struct pointers).
I'm not sure how the physical address space matters for this.
Philipp
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