cpuops: Use cmpxchg for xchg to avoid lock semantics

[cascardo/linux.git] / include / linux / usb.h

diff --git a/include/linux/usb.h b/include/linux/usb.h
index 24300d8..a28eb25 100644 (file)
--- a/include/linux/usb.h
+++ b/include/linux/usb.h
@@ -313,6 +313,10 @@ struct usb_bus {
        int busnum;                     /* Bus number (in order of reg) */
        const char *bus_name;           /* stable id (PCI slot_name etc) */
        u8 uses_dma;                    /* Does the host controller use DMA? */
+       u8 uses_pio_for_control;        /*
+                                        * Does the host controller use PIO
+                                        * for control transfers?
+                                        */
        u8 otg_port;                    /* 0, or number of OTG/HNP port */
        unsigned is_b_host:1;           /* true during some HNP roleswitches */
        unsigned b_hnp_enable:1;        /* OTG: did A-Host enable HNP? */