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authorJan Kiszka <jan.kiszka@web.de>2010-02-08 10:12:15 +0000
committerDavid S. Miller <davem@davemloft.net>2010-02-16 16:01:22 -0800
commit88c896ef87fd0dd4dbf36e8e86e019c74b1f6649 (patch)
tree727de518c111fc1d3d3a3bf49ea292ea414e17c6 /net
parent0ca3a017a7373a4545dd7b345a8a0cecc16bc7e2 (diff)
CAPI: Rework application locking
Drop the application rw-lock in favour of RCU. This synchronizes capi20_release against capi_ctr_handle_message which may dereference an application from (soft-)IRQ context. Any other access to the application list is now protected by the capi_controller_lock as well. This also allows to safely inspect applications for /proc dumping by holding capi_controller_lock. At this chance, drop some useless release_in_progress checks where we obtained the application pointer from the list (which becomes NULL on release_in_progress). Signed-off-by: Jan Kiszka <jan.kiszka@web.de> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
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