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Some lock comments.

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This commit is contained in:
skrll 2013-09-07 16:47:23 +00:00
parent 43ff4efcf0
commit b8a293f0ef
2 changed files with 12 additions and 5 deletions
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13
sys/dev/usb/usbdi.h
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@ -1,4 +1,4 @@
/* $NetBSD: usbdi.h,v 1.87 2013/01/22 13:27:59 jmcneill Exp $ */
/* $NetBSD: usbdi.h,v 1.88 2013/09/07 16:47:23 skrll Exp $ */
/* $FreeBSD: src/sys/dev/usb/usbdi.h,v 1.18 1999/11/17 22:33:49 n_hibma Exp $ */
/*
@ -278,9 +278,16 @@ struct usbif_attach_arg {
/* No match */
#define UMATCH_NONE 0
/*
* IPL_USB is defined as IPL_VM for drivers that have not been made MP safe.
* IPL_VM (currently) takes the kernel lock.
*
* Eventually, IPL_USB can/should be changed
*/
#define splusb splsoftnet
#define splhardusb splbio
#define IPL_USB IPL_BIO
#define splhardusb splvm
#define IPL_SOFTUSB IPL_SOFTNET
#define IPL_USB IPL_VM
#endif /* _USBDI_H_ */

4
sys/dev/usb/usbdivar.h
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@ -1,4 +1,4 @@
/* $NetBSD: usbdivar.h,v 1.103 2013/03/24 22:38:45 skrll Exp $ */
/* $NetBSD: usbdivar.h,v 1.104 2013/09/07 16:47:23 skrll Exp $ */
/*
* Copyright (c) 1998, 2012 The NetBSD Foundation, Inc.
@ -33,7 +33,7 @@
/*
* Discussion about locking in the USB code:
*
* The host controller presents one lock at IPL_SOFTUSB.
* The host controller presents one lock at IPL_SOFTUSB (aka IPL_SOFTNET).
*
* List of hardware interface methods, and whether the lock is held
* when each is called by this module: