Laura Abbott 7ee793a62f
cma: Remove potential deadlock situation ...
CMA locking is currently very coarse. The cma_mutex protects both
the bitmap and avoids concurrency with alloc_contig_range. There
are several situations which may result in a deadlock on the CMA
mutex currently, mostly involving AB/BA situations with alloc and
free. Fix this issue by protecting the bitmap with a mutex per CMA
region and use the existing mutex for protecting against concurrency
with alloc_contig_range.
Signed-off-by: Laura Abbott <lauraa@codeaurora.org >
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com >
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Laura Abbott
7ee793a62f