From 72d4fbf168854e50843f5283d1046b008da7a3fa Mon Sep 17 00:00:00 2001
From: patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3>
Date: Sun, 16 Nov 2008 22:05:28 +0000
Subject: [PATCH] Poll API may be disabled

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1259 42af7a65-404d-4744-a932-0658087f49c3
---
 Documentation/NuttxUserGuide.html | 2 +-
 configs/README.txt                | 2 +-
 fs/fs_poll.c                      | 4 ++++
 include/nuttx/fs.h                | 4 +++-
 include/nuttx/net.h               | 2 ++
 net/net-poll.c                    | 4 ++--
 6 files changed, 13 insertions(+), 5 deletions(-)

diff --git a/Documentation/NuttxUserGuide.html b/Documentation/NuttxUserGuide.html
index 557d59036eb..7d37b73ef18 100644
--- a/Documentation/NuttxUserGuide.html
+++ b/Documentation/NuttxUserGuide.html
@@ -5772,7 +5772,7 @@ interface of the same name.
   <li><a href="#unsetenv">2.10.5 <code>unsetenv</code></a></li>
 </ul>
 <p><b>Disabling Environment Variable Support</b>.
-  All support for environment variables can be disabled by setting <code>CONFIG_DISABLE_ENVIRONMENT</code>
+  All support for environment variables can be disabled by setting <code>CONFIG_DISABLE_ENVIRON</code>
   in the board configuration file.
 </p>
 
diff --git a/configs/README.txt b/configs/README.txt
index 71a1f49e488..750d945a95a 100644
--- a/configs/README.txt
+++ b/configs/README.txt
@@ -212,7 +212,7 @@ defconfig -- This is a configuration file similar to the Linux
 
 		CONFIG_DISABLE_CLOCK, CONFIG_DISABLE_POSIX_TIMERS, CONFIG_DISABLE_PTHREAD.
 		CONFIG_DISABLE_SIGNALS, CONFIG_DISABLE_MQUEUE, CONFIG_DISABLE_MOUNTPOUNT,
-		CONFIG_DISABLE_ENVIRON
+		CONFIG_DISABLE_ENVIRON, CONFIG_DISABLE_POLL
 
 
 	Misc libc settings
diff --git a/fs/fs_poll.c b/fs/fs_poll.c
index 2f585d8183c..a59cee5aaf6 100644
--- a/fs/fs_poll.c
+++ b/fs/fs_poll.c
@@ -51,6 +51,8 @@
 
 #include "fs_internal.h"
 
+#ifndef CONFIG_DISABLE_POLL
+
 /****************************************************************************
  * Definitions
  ****************************************************************************/
@@ -313,3 +315,5 @@ int poll(FAR struct pollfd *fds, nfds_t nfds, int timeout)
   return count;
 }
 
+#endif /* CONFIG_DISABLE_POLL */
+
diff --git a/include/nuttx/fs.h b/include/nuttx/fs.h
index 65e03320856..ced7beed1c9 100644
--- a/include/nuttx/fs.h
+++ b/include/nuttx/fs.h
@@ -75,7 +75,9 @@ struct file_operations
   ssize_t (*write)(FAR struct file *filp, FAR const char *buffer, size_t buflen);
   off_t   (*seek)(FAR struct file *filp, off_t offset, int whence);
   int     (*ioctl)(FAR struct file *filp, int cmd, unsigned long arg);
-  int     (*poll)(FAR struct file *filp, struct pollfd *poll);
+#ifndef CONFIG_DISABLE_POLL
+  int     (*poll)(FAR struct file *filp, struct pollfd *fds);
+#endif
 
   /* The two structures need not be common after this point */
 };
diff --git a/include/nuttx/net.h b/include/nuttx/net.h
index 5126e7b651c..9ae4217cc84 100644
--- a/include/nuttx/net.h
+++ b/include/nuttx/net.h
@@ -158,8 +158,10 @@ EXTERN int netdev_ioctl(int sockfd, int cmd, struct ifreq *req);
  * to this function.
  */
 
+#ifndef CONFIG_DISABLE_POLL
 struct pollfd; /* Forward reference -- see poll.h */
 EXTERN int net_poll(int sockfd, struct pollfd *fds);
+#endif
 
 /* netdev-register.c *********************************************************/
 /* This function is called by network interface device drivers to inform the
diff --git a/net/net-poll.c b/net/net-poll.c
index ef4ba9dd3ad..b11cfe964bc 100644
--- a/net/net-poll.c
+++ b/net/net-poll.c
@@ -38,7 +38,7 @@
  ****************************************************************************/
 
 #include <nuttx/config.h>
-#ifdef CONFIG_NET
+#if defined(CONFIG_NET) && !defined(CONFIG_DISABLE_POLL)
 
 #include <sys/types.h>
 #include <sys/socket.h>
@@ -77,4 +77,4 @@ int net_poll(int sockfd, struct pollfd *fds)
   return -ENOSYS;
 }
 
-#endif /* CONFIG_NET */
+#endif /* CONFIG_NET&& !CONFIG_DISABLE_POLL */