Registering the same notifier to a hook repeatedly can cause the hook
list to form a ring or lose other members of the list.
so, need add a check in in notifier_chain_register(),
intercepting duplicate registrations to avoid infinite loops
v1:
* use notifier_chain_cond_register replace notifier_chain_register
v2:
* Add a check in notifier_chain_register() to avoid duplicate registration
* remove notifier_chain_cond_register() to avoid duplicate code
* remove blocking_notifier_chain_cond_register() to avoid duplicate code
v3:
* Add a cover letter.
v4:
* Add Reviewed-by and adjust the title.
Xiaoming Ni (3):
kernel/notifier.c: intercepting duplicate registrations to avoid
infinite loops
kernel/notifier.c: remove notifier_chain_cond_register()
kernel/notifier.c: remove blocking_notifier_chain_cond_register()
include/linux/notifier.h | 4 ----
kernel/notifier.c | 41 +++--------------------------------------
net/sunrpc/rpc_pipe.c | 2 +-
3 files changed, 4 insertions(+), 43 deletions(-)
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1.8.5.6
