[PATCH] uml: move SIGIO startup code to os-Linux/start_up.c

The serial UML OS-abstraction layer patch (um/kernel dir).

This moves all startup code from sigio_user.c file under os-Linux dir

Signed-off-by: Gennady Sharapov <Gennady.V.Sharapov@intel.com>
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 10 insertions, 152 deletions

diff --git a/arch/um/kernel/sigio_user.c b/arch/um/kernel/sigio_user.c
index f7b18e157d35..9bef9413cb5d 100644
--- a/arch/um/kernel/sigio_user.c
+++ b/arch/um/kernel/sigio_user.c
@@ -1,4 +1,4 @@
-/* 
+/*
  * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
  * Licensed under the GPL
  */
@@ -20,127 +20,6 @@
 #include "sigio.h"
 #include "os.h"
 
-/* Changed during early boot */
-int pty_output_sigio = 0;
-int pty_close_sigio = 0;
-
-/* Used as a flag during SIGIO testing early in boot */
-static volatile int got_sigio = 0;
-
-void __init handler(int sig)
-{
-        got_sigio = 1;
-}
-
-struct openpty_arg {
-        int master;
-        int slave;
-        int err;
-};
-
-static void openpty_cb(void *arg)
-{
-        struct openpty_arg *info = arg;
-
-        info->err = 0;
-        if(openpty(&info->master, &info->slave, NULL, NULL, NULL))
-                info->err = -errno;
-}
-
-void __init check_one_sigio(void (*proc)(int, int))
-{
-        struct sigaction old, new;
-        struct openpty_arg pty = { .master = -1, .slave = -1 };
-        int master, slave, err;
-
-        initial_thread_cb(openpty_cb, &pty);
-        if(pty.err){
-                printk("openpty failed, errno = %d\n", -pty.err);
-                return;
-        }
-
-        master = pty.master;
-        slave = pty.slave;
-
-        if((master == -1) || (slave == -1)){
-                printk("openpty failed to allocate a pty\n");
-                return;
-        }
-
-        /* Not now, but complain so we now where we failed. */
-        err = raw(master);
-        if (err < 0)
-                panic("check_sigio : __raw failed, errno = %d\n", -err);
-
-        err = os_sigio_async(master, slave);
-        if(err < 0)
-                panic("tty_fds : sigio_async failed, err = %d\n", -err);
-
-        if(sigaction(SIGIO, NULL, &old) < 0)
-                panic("check_sigio : sigaction 1 failed, errno = %d\n", errno);
-        new = old;
-        new.sa_handler = handler;
-        if(sigaction(SIGIO, &new, NULL) < 0)
-                panic("check_sigio : sigaction 2 failed, errno = %d\n", errno);
-
-        got_sigio = 0;
-        (*proc)(master, slave);
-                
-        os_close_file(master);
-        os_close_file(slave);
-
-        if(sigaction(SIGIO, &old, NULL) < 0)
-                panic("check_sigio : sigaction 3 failed, errno = %d\n", errno);
-}
-
-static void tty_output(int master, int slave)
-{
-        int n;
-        char buf[512];
-
-        printk("Checking that host ptys support output SIGIO...");
-
-        memset(buf, 0, sizeof(buf));
-
-        while(os_write_file(master, buf, sizeof(buf)) > 0) ;
-        if(errno != EAGAIN)
-                panic("check_sigio : write failed, errno = %d\n", errno);
-        while(((n = os_read_file(slave, buf, sizeof(buf))) > 0) && !got_sigio) ;
-
-        if (got_sigio) {
-                printk("Yes\n");
-                pty_output_sigio = 1;
-        } else if (n == -EAGAIN) {
-                printk("No, enabling workaround\n");
-        } else {
-                panic("check_sigio : read failed, err = %d\n", n);
-        }
-}
-
-static void tty_close(int master, int slave)
-{
-        printk("Checking that host ptys support SIGIO on close...");
-
-        os_close_file(slave);
-        if(got_sigio){
-                printk("Yes\n");
-                pty_close_sigio = 1;
-        }
-        else printk("No, enabling workaround\n");
-}
-
-void __init check_sigio(void)
-{
-        if((os_access("/dev/ptmx", OS_ACC_R_OK) < 0) &&
-           (os_access("/dev/ptyp0", OS_ACC_R_OK) < 0)){
-                printk("No pseudo-terminals available - skipping pty SIGIO "
-                       "check\n");
-                return;
-        }
-        check_one_sigio(tty_output);
-        check_one_sigio(tty_close);
-}
-
 /* Protected by sigio_lock(), also used by sigio_cleanup, which is an 
  * exitcall.
  */
@@ -267,10 +146,10 @@ static void update_thread(void)
         if(write_sigio_pid != -1) 
                 os_kill_process(write_sigio_pid, 1);
         write_sigio_pid = -1;
-        os_close_file(sigio_private[0]);
-        os_close_file(sigio_private[1]);
-        os_close_file(write_sigio_fds[0]);
-        os_close_file(write_sigio_fds[1]);
+        close(sigio_private[0]);
+        close(sigio_private[1]);
+        close(write_sigio_fds[0]);
+        close(write_sigio_fds[1]);
         /* Critical section end */
         set_signals(flags);
 }
@@ -428,39 +307,18 @@ void write_sigio_workaround(void)
  out_free:
         kfree(p);
  out_close2:
-        os_close_file(l_sigio_private[0]);
-        os_close_file(l_sigio_private[1]);
+        close(l_sigio_private[0]);
+        close(l_sigio_private[1]);
  out_close1:
-        os_close_file(l_write_sigio_fds[0]);
-        os_close_file(l_write_sigio_fds[1]);
+        close(l_write_sigio_fds[0]);
+        close(l_write_sigio_fds[1]);
         return;
 }
 
-int read_sigio_fd(int fd)
-{
-        int n;
-        char c;
-
-        n = os_read_file(fd, &c, sizeof(c));
-        if(n != sizeof(c)){
-                if(n < 0) {
-                        printk("read_sigio_fd - read failed, err = %d\n", -n);
-                        return(n);
-                }
-                else {
-                        printk("read_sigio_fd - short read, bytes = %d\n", n);
-                        return(-EIO);
-                }
-        }
-        return(n);
-}
-
-static void sigio_cleanup(void)
+void sigio_cleanup(void)
 {
         if (write_sigio_pid != -1) {
                 os_kill_process(write_sigio_pid, 1);
                 write_sigio_pid = -1;
         }
 }
-
-__uml_exitcall(sigio_cleanup);