[PATCH] Add a help message into man page of makedumpfile for -b option.

[Jingbai Ma]

This is a minor change that only adds a help message to -b option in makedumpfile man page.
This message has been in Red Hat's makedumpfile source, they would like it in upstream also.

Signed-off-by: Jingbai Ma <jingbai.ma at hp.com>
---
 makedumpfile.8 |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/makedumpfile.8 b/makedumpfile.8
index cfd1270..1e844db 100644
--- a/makedumpfile.8
+++ b/makedumpfile.8
@@ -534,6 +534,10 @@ order from left to right.  \fIVMCORE\fRs are assembled into a single
 Print debugging message.
 
 .TP
+\fB-b <order>\fR
+cache 2^order pages in ram when generating vmcore info before writing to output
+
+.TP
 \fB\-h\fR
 Show help message and LZO/snappy support status (enabled/disabled).