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| -rw-r--r-- | Documentation/bpf/kfuncs.rst | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/Documentation/bpf/kfuncs.rst b/Documentation/bpf/kfuncs.rst index 90774479ab7a..b027fe16ee66 100644 --- a/Documentation/bpf/kfuncs.rst +++ b/Documentation/bpf/kfuncs.rst @@ -191,6 +191,15 @@ rebooting or panicking. Due to this additional restrictions apply to these calls. At the moment they only require CAP_SYS_BOOT capability, but more can be added later. +2.4.8 KF_RCU flag +----------------- + +The KF_RCU flag is used for kfuncs which have a rcu ptr as its argument. +When used together with KF_ACQUIRE, it indicates the kfunc should have a +single argument which must be a trusted argument or a MEM_RCU pointer. +The argument may have reference count of 0 and the kfunc must take this +into consideration. + 2.5 Registering the kfuncs -------------------------- |