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Code Issues Releases Activity

devfs: Abstract locking assertions

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The conversion was largely mechanical: sed(1) with:

  -e 's|mtx_assert(&devmtx, MA_OWNED)|dev_lock_assert_locked()|g'
  -e 's|mtx_assert(&devmtx, MA_NOTOWNED)|dev_lock_assert_unlocked()|g'

The definitions of these abstractions in fs/devfs/devfs_int.h are the
only non-mechanical change.

No functional change.
This commit is contained in:
Conrad Meyer 2020-08-12 00:32:31 +00:00
parent b7883452d4
commit 0ac9e27ba9
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=364135
3 changed files with 21 additions and 18 deletions
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6
sys/fs/devfs/devfs_devs.c
View File

@ -156,7 +156,7 @@ devfs_dev_exists(const char *name)
{
struct cdev_priv *cdp;
mtx_assert(&devmtx, MA_OWNED);
dev_lock_assert_locked();
TAILQ_FOREACH(cdp, &cdevp_list, cdp_list) {
if ((cdp->cdp_flags & CDP_ACTIVE) == 0)
@ -707,7 +707,7 @@ devfs_create(struct cdev *dev)
{
struct cdev_priv *cdp;
mtx_assert(&devmtx, MA_OWNED);
dev_lock_assert_locked();
cdp = cdev2priv(dev);
cdp->cdp_flags |= CDP_ACTIVE;
cdp->cdp_inode = alloc_unrl(devfs_inos);
@ -721,7 +721,7 @@ devfs_destroy(struct cdev *dev)
{
struct cdev_priv *cdp;
mtx_assert(&devmtx, MA_OWNED);
dev_lock_assert_locked();
cdp = cdev2priv(dev);
cdp->cdp_flags &= ~CDP_ACTIVE;
devfs_generation++;

3
sys/fs/devfs/devfs_int.h
View File

@ -95,6 +95,9 @@ extern struct sx clone_drain_lock;
extern struct mtx cdevpriv_mtx;
extern TAILQ_HEAD(cdev_priv_list, cdev_priv) cdevp_list;
#define dev_lock_assert_locked() mtx_assert(&devmtx, MA_OWNED)
#define dev_lock_assert_unlocked() mtx_assert(&devmtx, MA_NOTOWNED)
#endif /* _KERNEL */
#endif /* !_FS_DEVFS_DEVFS_INT_H_ */

30
sys/kern/kern_conf.c
View File

@ -88,7 +88,7 @@ dev_unlock_and_free(void)
struct cdev_priv *cdp;
struct cdevsw *csw;
mtx_assert(&devmtx, MA_OWNED);
dev_lock_assert_locked();
/*
* Make the local copy of the list heads while the dev_mtx is
@ -116,7 +116,7 @@ dev_free_devlocked(struct cdev *cdev)
{
struct cdev_priv *cdp;
mtx_assert(&devmtx, MA_OWNED);
dev_lock_assert_locked();
cdp = cdev2priv(cdev);
KASSERT((cdp->cdp_flags & CDP_UNREF_DTR) == 0,
("destroy_dev() was not called after delist_dev(%p)", cdev));
@ -127,7 +127,7 @@ static void
cdevsw_free_devlocked(struct cdevsw *csw)
{
mtx_assert(&devmtx, MA_OWNED);
dev_lock_assert_locked();
SLIST_INSERT_HEAD(&cdevsw_gt_post_list, csw, d_postfree_list);
}
@ -142,7 +142,7 @@ void
dev_ref(struct cdev *dev)
{
mtx_assert(&devmtx, MA_NOTOWNED);
dev_lock_assert_unlocked();
mtx_lock(&devmtx);
dev->si_refcount++;
mtx_unlock(&devmtx);
@ -152,7 +152,7 @@ void
dev_refl(struct cdev *dev)
{
mtx_assert(&devmtx, MA_OWNED);
dev_lock_assert_locked();
dev->si_refcount++;
}
@ -161,7 +161,7 @@ dev_rel(struct cdev *dev)
{
int flag = 0;
mtx_assert(&devmtx, MA_NOTOWNED);
dev_lock_assert_unlocked();
dev_lock();
dev->si_refcount--;
KASSERT(dev->si_refcount >= 0,
@ -181,7 +181,7 @@ dev_refthread(struct cdev *dev, int *ref)
struct cdevsw *csw;
struct cdev_priv *cdp;
mtx_assert(&devmtx, MA_NOTOWNED);
dev_lock_assert_unlocked();
if ((dev->si_flags & SI_ETERNAL) != 0) {
*ref = 0;
return (dev->si_devsw);
@ -208,7 +208,7 @@ devvn_refthread(struct vnode *vp, struct cdev **devp, int *ref)
struct cdev_priv *cdp;
struct cdev *dev;
mtx_assert(&devmtx, MA_NOTOWNED);
dev_lock_assert_unlocked();
if ((vp->v_vflag & VV_ETERNALDEV) != 0) {
dev = vp->v_rdev;
if (dev == NULL)
@ -249,7 +249,7 @@ void
dev_relthread(struct cdev *dev, int ref)
{
mtx_assert(&devmtx, MA_NOTOWNED);
dev_lock_assert_unlocked();
if (!ref)
return;
KASSERT(dev->si_threadcount > 0,
@ -570,7 +570,7 @@ newdev(struct make_dev_args *args, struct cdev *si)
struct cdev *si2;
struct cdevsw *csw;
mtx_assert(&devmtx, MA_OWNED);
dev_lock_assert_locked();
csw = args->mda_devsw;
si2 = NULL;
if (csw->d_flags & D_NEEDMINOR) {
@ -629,7 +629,7 @@ prep_cdevsw(struct cdevsw *devsw, int flags)
{
struct cdevsw *dsw2;
mtx_assert(&devmtx, MA_OWNED);
dev_lock_assert_locked();
if (devsw->d_flags & D_INIT)
return (0);
if (devsw->d_flags & D_NEEDGIANT) {
@ -714,7 +714,7 @@ prep_devname(struct cdev *dev, const char *fmt, va_list ap)
int len;
char *from, *q, *s, *to;
mtx_assert(&devmtx, MA_OWNED);
dev_lock_assert_locked();
len = vsnrprintf(dev->si_name, sizeof(dev->si_name), 32, fmt, ap);
if (len > sizeof(dev->si_name) - 1)
@ -1098,7 +1098,7 @@ destroy_devl(struct cdev *dev)
struct cdev_privdata *p;
struct cdev_priv *cdp;
mtx_assert(&devmtx, MA_OWNED);
dev_lock_assert_locked();
KASSERT(dev->si_flags & SI_NAMED,
("WARNING: Driver mistake: destroy_dev on %d\n", dev2unit(dev)));
KASSERT((dev->si_flags & SI_ETERNAL) == 0,
@ -1200,7 +1200,7 @@ delist_dev_locked(struct cdev *dev)
struct cdev_priv *cdp;
struct cdev *child;
mtx_assert(&devmtx, MA_OWNED);
dev_lock_assert_locked();
cdp = cdev2priv(dev);
if ((cdp->cdp_flags & CDP_UNREF_DTR) != 0)
return;
@ -1464,7 +1464,7 @@ destroy_dev_sched_cbl(struct cdev *dev, void (*cb)(void *), void *arg)
{
struct cdev_priv *cp;
mtx_assert(&devmtx, MA_OWNED);
dev_lock_assert_locked();
cp = cdev2priv(dev);
if (cp->cdp_flags & CDP_SCHED_DTR) {
dev_unlock();