Remove all inclusions of <linux/config.h>

[powerpc.git] / arch / um / kernel / irq.c

diff --git a/arch/um/kernel/irq.c b/arch/um/kernel/irq.c
index bfd0bdc..eee97bb 100644 (file)
--- a/arch/um/kernel/irq.c
+++ b/arch/um/kernel/irq.c
@@ -5,7 +5,6 @@
  *     Copyright (C) 1992, 1998 Linus Torvalds, Ingo Molnar
  */
 
-#include "linux/config.h"
 #include "linux/kernel.h"
 #include "linux/module.h"
 #include "linux/smp.h"
@@ -110,18 +109,7 @@ void sigio_handler(int sig, union uml_pt_regs *regs)
        free_irqs();
 }
 
-static void maybe_sigio_broken(int fd, int type)
-{
-       if (os_isatty(fd)) {
-               if ((type == IRQ_WRITE) && !pty_output_sigio) {
-                       write_sigio_workaround();
-                       add_sigio_fd(fd, 0);
-               } else if ((type == IRQ_READ) && !pty_close_sigio) {
-                       write_sigio_workaround();
-                       add_sigio_fd(fd, 1);
-               }
-       }
-}
+static DEFINE_SPINLOCK(irq_lock);
 
 int activate_fd(int irq, int fd, int type, void *dev_id)
 {
@@ -153,20 +141,7 @@ int activate_fd(int irq, int fd, int type, void *dev_id)
                                     .events            = events,
                                     .current_events    = 0 } );
 
-       /* Critical section - locked by a spinlock because this stuff can
-        * be changed from interrupt handlers.  The stuff above is done
-        * outside the lock because it allocates memory.
-        */
-
-       /* Actually, it only looks like it can be called from interrupt
-        * context.  The culprit is reactivate_fd, which calls
-        * maybe_sigio_broken, which calls write_sigio_workaround,
-        * which calls activate_fd.  However, write_sigio_workaround should
-        * only be called once, at boot time.  That would make it clear that
-        * this is called only from process context, and can be locked with
-        * a semaphore.
-        */
-       flags = irq_lock();
+       spin_lock_irqsave(&irq_lock, flags);
        for (irq_fd = active_fds; irq_fd != NULL; irq_fd = irq_fd->next) {
                if ((irq_fd->fd == fd) && (irq_fd->type == type)) {
                        printk("Registering fd %d twice\n", fd);
@@ -176,7 +151,6 @@ int activate_fd(int irq, int fd, int type, void *dev_id)
                }
        }
 
-       /*-------------*/
        if (type == IRQ_WRITE)
                fd = -1;
 
@@ -199,7 +173,7 @@ int activate_fd(int irq, int fd, int type, void *dev_id)
                 * so we will not be able to put new pollfd struct to pollfds
                 * then we free the buffer tmp_fds and try again.
                 */
-               irq_unlock(flags);
+               spin_unlock_irqrestore(&irq_lock, flags);
                kfree(tmp_pfd);
                tmp_pfd = NULL;
 
@@ -207,37 +181,36 @@ int activate_fd(int irq, int fd, int type, void *dev_id)
                if (tmp_pfd == NULL)
                        goto out_kfree;
 
-               flags = irq_lock();
+               spin_lock_irqsave(&irq_lock, flags);
        }
-       /*-------------*/
 
        *last_irq_ptr = new_fd;
        last_irq_ptr = &new_fd->next;
 
-       irq_unlock(flags);
+       spin_unlock_irqrestore(&irq_lock, flags);
 
        /* This calls activate_fd, so it has to be outside the critical
         * section.
         */
-       maybe_sigio_broken(fd, type);
+       maybe_sigio_broken(fd, (type == IRQ_READ));
 
-       return(0);
+       return 0;
 
  out_unlock:
-       irq_unlock(flags);
+       spin_unlock_irqrestore(&irq_lock, flags);
  out_kfree:
        kfree(new_fd);
  out:
-       return(err);
+       return err;
 }
 
 static void free_irq_by_cb(int (*test)(struct irq_fd *, void *), void *arg)
 {
        unsigned long flags;
 
-       flags = irq_lock();
+       spin_lock_irqsave(&irq_lock, flags);
        os_free_irq_by_cb(test, arg, active_fds, &last_irq_ptr);
-       irq_unlock(flags);
+       spin_unlock_irqrestore(&irq_lock, flags);
 }
 
 struct irq_and_dev {
@@ -304,19 +277,16 @@ void reactivate_fd(int fd, int irqnum)
        unsigned long flags;
        int i;
 
-       flags = irq_lock();
+       spin_lock_irqsave(&irq_lock, flags);
        irq = find_irq_by_fd(fd, irqnum, &i);
        if (irq == NULL) {
-               irq_unlock(flags);
+               spin_unlock_irqrestore(&irq_lock, flags);
                return;
        }
        os_set_pollfd(i, irq->fd);
-       irq_unlock(flags);
+       spin_unlock_irqrestore(&irq_lock, flags);
 
-       /* This calls activate_fd, so it has to be outside the critical
-        * section.
-        */
-       maybe_sigio_broken(fd, irq->type);
+       add_sigio_fd(fd);
 }
 
 void deactivate_fd(int fd, int irqnum)
@@ -325,13 +295,17 @@ void deactivate_fd(int fd, int irqnum)
        unsigned long flags;
        int i;
 
-       flags = irq_lock();
+       spin_lock_irqsave(&irq_lock, flags);
        irq = find_irq_by_fd(fd, irqnum, &i);
-       if (irq == NULL)
-               goto out;
+       if(irq == NULL){
+               spin_unlock_irqrestore(&irq_lock, flags);
+               return;
+       }
+
        os_set_pollfd(i, -1);
- out:
-       irq_unlock(flags);
+       spin_unlock_irqrestore(&irq_lock, flags);
+
+       ignore_sigio_fd(fd);
 }
 
 int deactivate_all_fds(void)
@@ -350,13 +324,14 @@ int deactivate_all_fds(void)
        return 0;
 }
 
+#ifdef CONFIG_MODE_TT
 void forward_interrupts(int pid)
 {
        struct irq_fd *irq;
        unsigned long flags;
        int err;
 
-       flags = irq_lock();
+       spin_lock_irqsave(&irq_lock, flags);
        for (irq = active_fds; irq != NULL; irq = irq->next) {
                err = os_set_owner(irq->fd, pid);
                if (err < 0) {
@@ -369,8 +344,9 @@ void forward_interrupts(int pid)
 
                irq->pid = pid;
        }
-       irq_unlock(flags);
+       spin_unlock_irqrestore(&irq_lock, flags);
 }
+#endif
 
 /*
  * do_IRQ handles all normal device IRQ's (the special
@@ -403,21 +379,6 @@ int um_request_irq(unsigned int irq, int fd, int type,
 EXPORT_SYMBOL(um_request_irq);
 EXPORT_SYMBOL(reactivate_fd);
 
-static DEFINE_SPINLOCK(irq_spinlock);
-
-unsigned long irq_lock(void)
-{
-       unsigned long flags;
-
-       spin_lock_irqsave(&irq_spinlock, flags);
-       return flags;
-}
-
-void irq_unlock(unsigned long flags)
-{
-       spin_unlock_irqrestore(&irq_spinlock, flags);
-}
-
 /* hw_interrupt_type must define (startup || enable) &&
  * (shutdown || disable) && end */
 static void dummy(unsigned int irq)