basic modification from way back

[powerpc.git] / arch / mips / kernel / vpe.c

diff --git a/arch/mips/kernel/vpe.c b/arch/mips/kernel/vpe.c
index 4e832da..c9ee9d2 100644 (file)
--- a/arch/mips/kernel/vpe.c
+++ b/arch/mips/kernel/vpe.c
@@ -1079,6 +1079,7 @@ static int getcwd(char *buff, int size)
 static int vpe_open(struct inode *inode, struct file *filp)
 {
        int minor, ret;
+       enum vpe_state state;
        struct vpe *v;
        struct vpe_notifications *not;
 
@@ -1093,7 +1094,8 @@ static int vpe_open(struct inode *inode, struct file *filp)
                return -ENODEV;
        }
 
-       if (v->state != VPE_STATE_UNUSED) {
+       state = xchg(&v->state, VPE_STATE_INUSE);
+       if (state != VPE_STATE_UNUSED) {
                dvpe();
 
                printk(KERN_DEBUG "VPE loader: tc in use dumping regs\n");
@@ -1108,9 +1110,6 @@ static int vpe_open(struct inode *inode, struct file *filp)
                cleanup_tc(get_tc(minor));
        }
 
-       // allocate it so when we get write ops we know it's expected.
-       v->state = VPE_STATE_INUSE;
-
        /* this of-course trashes what was there before... */
        v->pbuffer = vmalloc(P_SIZE);
        v->plen = P_SIZE;
@@ -1208,7 +1207,7 @@ static ssize_t vpe_write(struct file *file, const char __user * buffer,
        return ret;
 }
 
-static struct file_operations vpe_fops = {
+static const struct file_operations vpe_fops = {
        .owner = THIS_MODULE,
        .open = vpe_open,
        .release = vpe_release,