enable kexec

[linux-2.6.git] / arch / um / drivers / chan_kern.c

diff --git a/arch/um/drivers/chan_kern.c b/arch/um/drivers/chan_kern.c
index 56e19fa..9ffd300 100644 (file)
--- a/arch/um/drivers/chan_kern.c
+++ b/arch/um/drivers/chan_kern.c
@@ -17,6 +17,7 @@
 #include "irq_user.h"
 #include "sigio.h"
 #include "line.h"
+#include "os.h"
 
 static void *not_configged_init(char *str, int device, struct chan_opts *opts)
 {
@@ -87,6 +88,54 @@ static struct chan_ops not_configged_ops = {
        .winch          = 0,
 };
 
+void generic_close(int fd, void *unused)
+{
+       os_close_file(fd);
+}
+
+int generic_read(int fd, char *c_out, void *unused)
+{
+       int n;
+
+       n = os_read_file(fd, c_out, sizeof(*c_out));
+
+       if(n == -EAGAIN)
+               return(0);
+       else if(n == 0)
+               return(-EIO);
+       return(n);
+}
+
+/* XXX Trivial wrapper around os_write_file */
+
+int generic_write(int fd, const char *buf, int n, void *unused)
+{
+       return(os_write_file(fd, buf, n));
+}
+
+int generic_window_size(int fd, void *unused, unsigned short *rows_out,
+                       unsigned short *cols_out)
+{
+       int rows, cols;
+       int ret;
+
+       ret = os_window_size(fd, &rows, &cols);
+       if(ret < 0)
+               return(ret);
+
+       ret = ((*rows_out != rows) || (*cols_out != cols));
+
+       *rows_out = rows;
+       *cols_out = cols;
+
+       return(ret);
+}
+
+void generic_free(void *data)
+{
+       kfree(data);
+}
+
 static void tty_receive_char(struct tty_struct *tty, char ch)
 {
        if(tty == NULL) return;