Diff of /docs/man3/libpfm_intel_nhm_unc.3 [cd6fdb] .. [4ba6cc] Maximize Restore

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--- a/docs/man3/libpfm_intel_nhm_unc.3
+++ b/docs/man3/libpfm_intel_nhm_unc.3
@@ -1,5 +1,6 @@
-.TH LIBPFM 3  "September, 2009" "" "Linux Programmer's Manual"
-.SH NAME libpfm_intel_nhm_unc \- support for Intel Nehalem uncore PMU
+.TH LIBPFM 4  "September, 2009" "" "Linux Programmer's Manual"
+.SH NAME
+libpfm_intel_nhm_unc- support for Intel Nehalem uncore PMU
 .SH SYNOPSIS
 .nf
 .B #include <perfmon/pfmlib.h>
@@ -34,6 +35,9 @@
 Causes the queue occupancy counter associated with the event to be cleared (zeroed). This is a boolean
 modifier.
 
+.SH ENVIRONMENT VARIABLES
+It is possible to force activation of the Intel Nehalem uncore PMU support using the \fBLIBPFM_FORCE_PMU\fR variable.
+The PMU name, nhm_unc, must be passed. No additional options are supported.
 .SH AUTHORS
 .nf
 Stephane Eranian <eranian@gmail.com>