xen-gntdev: Add reference counting to maps

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This allows userspace to perform mmap() on the gntdev device and then
immediately close the filehandle or remove the mapping using the
remove ioctl, with the mapped area remaining valid until unmapped.
This also fixes an infinite loop when a gntdev device is closed
without first unmapping all areas.

Signed-off-by: Daniel De Graaf <dgdegra@tycho.nsa.gov>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

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Daniel De Graaf 2011-02-03 12:19:01 -05:00 • committed by Konrad Rzeszutek Wilk

parent a879211bf1

commit 68b025c813

1 changed files with 27 additions and 40 deletions

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drivers/xen/gntdev.c

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