diff options
| author | Matthias Beyer <mail@beyermatthias.de> | 2013-10-05 23:09:15 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-10-11 16:58:01 -0700 |
| commit | 059239adfe577866115cd5270eba40e3cac33f8a (patch) | |
| tree | ebeda4730820ebae0af9c1b73e0e2d9a516fcfed | |
| parent | 29824c167bead38986d5e8d33008680c62478777 (diff) | |
drivers: usb: core: hcd.c: converted busmap from struct to bitmap
The DECLARE_BITMAP macro should be used for declaring this bitmap.
This commit converts the busmap from a struct to a simple (static)
bitmap, using the DECLARE_BITMAP macro from linux/types.h.
Please review, as I'm new to kernel development, I don't know if this
has any hidden side effects!
Suggested by joe@perches.com
Signed-off-by: Matthias Beyer <mail@beyermatthias.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/usb/core/hcd.c | 12 |
1 files changed, 5 insertions, 7 deletions
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c index 149cdf129293..6ec8dda31118 100644 --- a/drivers/usb/core/hcd.c +++ b/drivers/usb/core/hcd.c @@ -40,6 +40,7 @@ #include <linux/platform_device.h> #include <linux/workqueue.h> #include <linux/pm_runtime.h> +#include <linux/types.h> #include <linux/usb.h> #include <linux/usb/hcd.h> @@ -92,10 +93,7 @@ EXPORT_SYMBOL_GPL (usb_bus_list); /* used when allocating bus numbers */ #define USB_MAXBUS 64 -struct usb_busmap { - unsigned long busmap[USB_MAXBUS / (8*sizeof (unsigned long))]; -}; -static struct usb_busmap busmap; +static DECLARE_BITMAP(busmap, USB_MAXBUS); /* used when updating list of hcds */ DEFINE_MUTEX(usb_bus_list_lock); /* exported only for usbfs */ @@ -941,12 +939,12 @@ static int usb_register_bus(struct usb_bus *bus) int busnum; mutex_lock(&usb_bus_list_lock); - busnum = find_next_zero_bit (busmap.busmap, USB_MAXBUS, 1); + busnum = find_next_zero_bit(busmap, USB_MAXBUS, 1); if (busnum >= USB_MAXBUS) { printk (KERN_ERR "%s: too many buses\n", usbcore_name); goto error_find_busnum; } - set_bit (busnum, busmap.busmap); + set_bit(busnum, busmap); bus->busnum = busnum; /* Add it to the local list of buses */ @@ -987,7 +985,7 @@ static void usb_deregister_bus (struct usb_bus *bus) usb_notify_remove_bus(bus); - clear_bit (bus->busnum, busmap.busmap); + clear_bit(bus->busnum, busmap); } /** |