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| author | Jan Kiszka <jan.kiszka@web.de> | 2010-02-08 13:12:15 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-02-17 03:01:22 +0300 |
| commit | 88c896ef87fd0dd4dbf36e8e86e019c74b1f6649 (patch) | |
| tree | 727de518c111fc1d3d3a3bf49ea292ea414e17c6 /drivers/s390 | |
| parent | 0ca3a017a7373a4545dd7b345a8a0cecc16bc7e2 (diff) | |
| download | linux-88c896ef87fd0dd4dbf36e8e86e019c74b1f6649.tar.xz | |
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 'drivers/s390')
0 files changed, 0 insertions, 0 deletions