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Diffstat (limited to 'arch/um/os-Linux/sigio.c')
-rw-r--r--arch/um/os-Linux/sigio.c39
1 files changed, 23 insertions, 16 deletions
diff --git a/arch/um/os-Linux/sigio.c b/arch/um/os-Linux/sigio.c
index abf47a7c4abd..eb8f2e4be192 100644
--- a/arch/um/os-Linux/sigio.c
+++ b/arch/um/os-Linux/sigio.c
@@ -1,5 +1,5 @@
/*
- * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Copyright (C) 2002 - 2008 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* Licensed under the GPL
*/
@@ -15,6 +15,7 @@
#include "kern_util.h"
#include "init.h"
#include "os.h"
+#include "process.h"
#include "sigio.h"
#include "um_malloc.h"
#include "user.h"
@@ -109,7 +110,7 @@ static int need_poll(struct pollfds *polls, int n)
if (n <= polls->size)
return 0;
- new = kmalloc(n * sizeof(struct pollfd), UM_GFP_ATOMIC);
+ new = uml_kmalloc(n * sizeof(struct pollfd), UM_GFP_ATOMIC);
if (new == NULL) {
printk(UM_KERN_ERR "need_poll : failed to allocate new "
"pollfds\n");
@@ -243,7 +244,7 @@ static struct pollfd *setup_initial_poll(int fd)
{
struct pollfd *p;
- p = kmalloc(sizeof(struct pollfd), UM_GFP_KERNEL);
+ p = uml_kmalloc(sizeof(struct pollfd), UM_GFP_KERNEL);
if (p == NULL) {
printk(UM_KERN_ERR "setup_initial_poll : failed to allocate "
"poll\n");
@@ -338,20 +339,10 @@ out_close1:
close(l_write_sigio_fds[1]);
}
-/* Changed during early boot */
-static int pty_output_sigio = 0;
-static int pty_close_sigio = 0;
-
-void maybe_sigio_broken(int fd, int read)
+void sigio_broken(int fd, int read)
{
int err;
- if (!isatty(fd))
- return;
-
- if ((read || pty_output_sigio) && (!read || pty_close_sigio))
- return;
-
write_sigio_workaround();
sigio_lock();
@@ -370,6 +361,21 @@ out:
sigio_unlock();
}
+/* Changed during early boot */
+static int pty_output_sigio;
+static int pty_close_sigio;
+
+void maybe_sigio_broken(int fd, int read)
+{
+ if (!isatty(fd))
+ return;
+
+ if ((read || pty_output_sigio) && (!read || pty_close_sigio))
+ return;
+
+ sigio_broken(fd, read);
+}
+
static void sigio_cleanup(void)
{
if (write_sigio_pid == -1)
@@ -383,7 +389,7 @@ static void sigio_cleanup(void)
__uml_exitcall(sigio_cleanup);
/* Used as a flag during SIGIO testing early in boot */
-static volatile int got_sigio = 0;
+static int got_sigio;
static void __init handler(int sig)
{
@@ -498,7 +504,8 @@ static void tty_output(int master, int slave)
if (errno != EAGAIN)
printk(UM_KERN_ERR "tty_output : write failed, errno = %d\n",
errno);
- while (((n = read(slave, buf, sizeof(buf))) > 0) && !got_sigio)
+ while (((n = read(slave, buf, sizeof(buf))) > 0) &&
+ !({ barrier(); got_sigio; }))
;
if (got_sigio) {