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-rw-r--r--Documentation/kprobes.txt8
1 files changed, 5 insertions, 3 deletions
diff --git a/Documentation/kprobes.txt b/Documentation/kprobes.txt
index 1762b81..741fe66 100644
--- a/Documentation/kprobes.txt
+++ b/Documentation/kprobes.txt
@@ -542,9 +542,11 @@ Kprobes does not use mutexes or allocate memory except during
registration and unregistration.
Probe handlers are run with preemption disabled. Depending on the
-architecture, handlers may also run with interrupts disabled. In any
-case, your handler should not yield the CPU (e.g., by attempting to
-acquire a semaphore).
+architecture and optimization state, handlers may also run with
+interrupts disabled (e.g., kretprobe handlers and optimized kprobe
+handlers run without interrupt disabled on x86/x86-64). In any case,
+your handler should not yield the CPU (e.g., by attempting to acquire
+a semaphore).
Since a return probe is implemented by replacing the return
address with the trampoline's address, stack backtraces and calls