Messages in this thread |  | | Date | Thu, 23 Nov 2000 00:49:29 +0000 | From | Pavel Machek <> | Subject | Re: Address translation |
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Hi!
> otherwise valid) I think the access macros are unnecessary. I would be > *very* glad if someone could confirm this, or shoot me down. :) > > For instance, a kernel module I am writing allocates some memory in > the current process's address space as follows: > > down(&mm->mmap_sem); > s->table = (void **)get_unmapped_area(0, SIZEOF_TABLE); > if ( s->table != NULL ) > do_brk((unsigned long)s->table, SIZEOF_TABLE); > up(&mm->mmap_sem); > > Some questions: > (1) In a "top half" thread, can I now access this memory without the > access macros (since I know the address range is valid)? > (2) Can I also access this memory from an interrupt/exception > context, or must I lock it? (ie. can faults be handled from such > a context)
poof! I've shooted you.
You may definitely access such memory from interrupt.
-- Philips Velo 1: 1"x4"x8", 300gram, 60, 12MB, 40bogomips, linux, mutt, details at http://atrey.karlin.mff.cuni.cz/~pavel/velo/index.html.
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