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Diffstat (limited to 'Documentation/RCU/NMI-RCU.rst')
| -rw-r--r-- | Documentation/RCU/NMI-RCU.rst | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/Documentation/RCU/NMI-RCU.rst b/Documentation/RCU/NMI-RCU.rst index 180958388ff9..dff60a80b386 100644 --- a/Documentation/RCU/NMI-RCU.rst +++ b/Documentation/RCU/NMI-RCU.rst @@ -8,8 +8,7 @@ Although RCU is usually used to protect read-mostly data structures, it is possible to use RCU to provide dynamic non-maskable interrupt handlers, as well as dynamic irq handlers. This document describes how to do this, drawing loosely from Zwane Mwaikambo's NMI-timer -work in "arch/x86/oprofile/nmi_timer_int.c" and in -"arch/x86/kernel/traps.c". +work in an old version of "arch/x86/kernel/traps.c". The relevant pieces of code are listed below, each followed by a brief explanation:: @@ -117,7 +116,7 @@ Answer to Quick Quiz: This same sad story can happen on other CPUs when using a compiler with aggressive pointer-value speculation - optimizations. + optimizations. (But please don't!) More important, the rcu_dereference_sched() makes it clear to someone reading the code that the pointer is |