Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm

[sfrench/cifs-2.6.git] / Documentation / RCU / NMI-RCU.txt

diff --git a/Documentation/RCU/NMI-RCU.txt b/Documentation/RCU/NMI-RCU.txt
index d0634a5c3445440f57104c589219bf71e8997a95..a6d32e65d222bbea68cba1c133db87c459c99dec 100644 (file)
--- a/Documentation/RCU/NMI-RCU.txt
+++ b/Documentation/RCU/NMI-RCU.txt
@@ -25,7 +25,7 @@ the NMI handler to take the default machine-specific action.
 This nmi_callback variable is a global function pointer to the current
 NMI handler.
 
-       fastcall void do_nmi(struct pt_regs * regs, long error_code)
+       void do_nmi(struct pt_regs * regs, long error_code)
        {
                int cpu;
 
@@ -93,6 +93,9 @@ Since NMI handlers disable preemption, synchronize_sched() is guaranteed
 not to return until all ongoing NMI handlers exit.  It is therefore safe
 to free up the handler's data as soon as synchronize_sched() returns.
 
+Important note: for this to work, the architecture in question must
+invoke irq_enter() and irq_exit() on NMI entry and exit, respectively.
+
 
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