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Roland Dreier 24bce50803 IB/umem: Fix possible hang on process exit ... If ib_umem_release() is called after ib_uverbs_close() sets context->closing, then a process can get stuck in a D state, because the code boils down to if (down_write_trylock(&mm->mmap_sem)) down_write(&mm->mmap_sem); which is obviously a stupid instant deadlock. Fix the code so that we only try to take the lock once. This bug was introduced in commit f7c6a7b5 ("IB/uverbs: Export ib_umem_get()/ib_umem_release() to modules") which fortunately never made it into a release, and was reported by Pete Wyckoff <pw@osc.edu>. Signed-off-by: Roland Dreier <rolandd@cisco.com>		18 years ago
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Makefile	IB/uverbs: Export ib_umem_get()/ib_umem_release() to modules	18 years ago
addr.c	…
agent.c	…
agent.h	…
cache.c	Detach sched.h from mm.h	18 years ago
cm.c	IB/cm: Fix stale connection detection	18 years ago
cm_msgs.h	…
cma.c	RDMA/cma: Fix initialization of next_port	18 years ago
core_priv.h	…
device.c	Merge branch 'for-linus' of master.kernel.org:/pub/scm/linux/kernel/git/roland/infiniband	18 years ago
fmr_pool.c	IB/fmr_pool: Add prefix to all printks	18 years ago
iwcm.c	PCI: Cleanup the includes of <linux/pci.h>	18 years ago
iwcm.h	…
mad.c	IB: Add CQ comp_vector support	18 years ago
mad_priv.h	PCI: Cleanup the includes of <linux/pci.h>	18 years ago
mad_rmpp.c	…
mad_rmpp.h	…
multicast.c	PCI: Cleanup the includes of <linux/pci.h>	18 years ago
packer.c	…
sa.h	…
sa_query.c	PCI: Cleanup the includes of <linux/pci.h>	18 years ago
smi.c	IB/mad: Change SMI to use enums rather than magic return codes	18 years ago
smi.h	IB/mad: Change SMI to use enums rather than magic return codes	18 years ago
sysfs.c	IB: Set class_dev->dev in core for nice device symlink	18 years ago
ucm.c	IB/ucm: Simplify ib_ucm_event()	18 years ago
ucma.c	…
ud_header.c	…
umem.c	IB/umem: Fix possible hang on process exit	18 years ago
user_mad.c	PCI: Cleanup the includes of <linux/pci.h>	18 years ago
uverbs.h	IB/uverbs: Export ib_umem_get()/ib_umem_release() to modules	18 years ago
uverbs_cmd.c	IB/uverbs: Export ib_umem_get()/ib_umem_release() to modules	18 years ago
uverbs_main.c	IB/uverbs: Export ib_umem_get()/ib_umem_release() to modules	18 years ago
uverbs_marshall.c	…
verbs.c	IB: Add CQ comp_vector support	18 years ago