[PATCH] man: add a note about direct pointer dereferencing

[Ruslan Kuprieiev <rkuprieiev at cloudlinux dot com>]

It is currently not very clear how to dereference a pointer to
a basic type, so lets add two notes about it to man pages.

Signed-off-by: Ruslan Kuprieiev <rkuprieiev@cloudlinux.com>
---
 man/stap.1.in        | 4 +++-
 man/stapprobes.3stap | 4 +++-
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/man/stap.1.in b/man/stap.1.in
index 6812391..e2a89f7 100644
--- a/man/stap.1.in
+++ b/man/stap.1.in
@@ -1724,7 +1724,9 @@ and dereference the
 .I member
 value.  Further
 .IR \->subfield
-expressions may be appended to dereference more levels.
+expressions may be appended to dereference more levels. Note that for direct
+dereferencing of a pointer {kernel,user}_{char,int,...}($p) should be used.
+(Refer to stapfuncs(5) for more details.)
 .BR
 NOTE:
 the same dereferencing operator 
diff --git a/man/stapprobes.3stap b/man/stapprobes.3stap
index ab011df..47416dd 100644
--- a/man/stapprobes.3stap
+++ b/man/stapprobes.3stap
@@ -612,7 +612,9 @@ operator is not used for plain structure
 members, only 
 .IR \->
 for both purposes.  (This is because "." is reserved for string
-concatenation.)
+concatenation.) Also note that for direct dereferencing of $var
+pointer {kernel,user}_{char,int,...}($var) should be used. (Refer to
+stapfuncs(5) for more details.)
 .TP
 $return
 is available in return probes only for functions that are declared
-- 
2.5.5