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Diffstat (limited to 'arch/um/kernel/irq.c')
-rw-r--r--arch/um/kernel/irq.c62
1 files changed, 19 insertions, 43 deletions
diff --git a/arch/um/kernel/irq.c b/arch/um/kernel/irq.c
index bfd0bdc8cd40..589c69a75043 100644
--- a/arch/um/kernel/irq.c
+++ b/arch/um/kernel/irq.c
@@ -110,18 +110,7 @@ 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)
{
@@ -166,7 +155,7 @@ int activate_fd(int irq, int fd, int type, void *dev_id)
* 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);
@@ -199,7 +188,7 @@ 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;
@@ -207,24 +196,24 @@ 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);
out_unlock:
- irq_unlock(flags);
+ spin_unlock_irqrestore(&irq_lock, flags);
out_kfree:
kfree(new_fd);
out:
@@ -235,9 +224,9 @@ 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 +293,19 @@ 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);
+ maybe_sigio_broken(fd, (irq->type == IRQ_READ));
}
void deactivate_fd(int fd, int irqnum)
@@ -325,13 +314,13 @@ 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;
os_set_pollfd(i, -1);
out:
- irq_unlock(flags);
+ spin_unlock_irqrestore(&irq_lock, flags);
}
int deactivate_all_fds(void)
@@ -350,13 +339,14 @@ 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 +359,9 @@ 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 +394,6 @@ 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)