1 files changed, 99 insertions, 0 deletions

diff --git a/include/linux/poll.h b/include/linux/poll.h
new file mode 100644
index 000000000000..f6da702088f4
--- /dev/null
+++ b/include/linux/poll.h
@@ -0,0 +1,99 @@
+#ifndef _LINUX_POLL_H
+#define _LINUX_POLL_H
+
+#include <asm/poll.h>
+
+#ifdef __KERNEL__
+
+#include <linux/compiler.h>
+#include <linux/wait.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <asm/uaccess.h>
+
+struct poll_table_struct;
+
+/* 
+ * structures and helpers for f_op->poll implementations
+ */
+typedef void (*poll_queue_proc)(struct file *, wait_queue_head_t *, struct poll_table_struct *);
+
+typedef struct poll_table_struct {
+        poll_queue_proc qproc;
+} poll_table;
+
+static inline void poll_wait(struct file * filp, wait_queue_head_t * wait_address, poll_table *p)
+{
+        if (p && wait_address)
+                p->qproc(filp, wait_address, p);
+}
+
+static inline void init_poll_funcptr(poll_table *pt, poll_queue_proc qproc)
+{
+        pt->qproc = qproc;
+}
+
+/*
+ * Structures and helpers for sys_poll/sys_poll
+ */
+struct poll_wqueues {
+        poll_table pt;
+        struct poll_table_page * table;
+        int error;
+};
+
+extern void poll_initwait(struct poll_wqueues *pwq);
+extern void poll_freewait(struct poll_wqueues *pwq);
+
+/*
+ * Scaleable version of the fd_set.
+ */
+
+typedef struct {
+        unsigned long *in, *out, *ex;
+        unsigned long *res_in, *res_out, *res_ex;
+} fd_set_bits;
+
+/*
+ * How many longwords for "nr" bits?
+ */
+#define FDS_BITPERLONG  (8*sizeof(long))
+#define FDS_LONGS(nr)   (((nr)+FDS_BITPERLONG-1)/FDS_BITPERLONG)
+#define FDS_BYTES(nr)   (FDS_LONGS(nr)*sizeof(long))
+
+/*
+ * We do a VERIFY_WRITE here even though we are only reading this time:
+ * we'll write to it eventually..
+ *
+ * Use "unsigned long" accesses to let user-mode fd_set's be long-aligned.
+ */
+static inline
+int get_fd_set(unsigned long nr, void __user *ufdset, unsigned long *fdset)
+{
+        nr = FDS_BYTES(nr);
+        if (ufdset)
+                return copy_from_user(fdset, ufdset, nr) ? -EFAULT : 0;
+
+        memset(fdset, 0, nr);
+        return 0;
+}
+
+static inline unsigned long __must_check
+set_fd_set(unsigned long nr, void __user *ufdset, unsigned long *fdset)
+{
+        if (ufdset)
+                return __copy_to_user(ufdset, fdset, FDS_BYTES(nr));
+        return 0;
+}
+
+static inline
+void zero_fd_set(unsigned long nr, unsigned long *fdset)
+{
+        memset(fdset, 0, FDS_BYTES(nr));
+}
+
+extern int do_select(int n, fd_set_bits *fds, long *timeout);
+
+#endif /* KERNEL */
+
+#endif /* _LINUX_POLL_H */