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lguest: documentation VII: FIXMEs

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Documentation: The FIXMEs

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Rusty Russell
2007-07-26 10:41:05 -07:00
committed by Linus Torvalds
parent f8f0fdcd40
commit f56a384e98
9 changed files with 89 additions and 0 deletions
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10
drivers/lguest/io.c
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@@ -553,6 +553,16 @@ void release_all_dma(struct lguest *lg)
up_read(&lg->mm->mmap_sem);
}
/*M:007 We only return a single DMA buffer to the Launcher, but it would be
* more efficient to return a pointer to the entire array of DMA buffers, which
* it can cache and choose one whenever it wants.
*
* Currently the Launcher uses a write to /dev/lguest, and the return value is
* the address of the DMA structure with the interrupt number placed in
* dma->used_len. If we wanted to return the entire array, we need to return
* the address, array size and interrupt number: this seems to require an
* ioctl(). :*/
/*L:320 This routine looks for a DMA buffer registered by the Guest on the
* given key (using the BIND_DMA hypercall). */
unsigned long get_dma_buffer(struct lguest *lg,