Date: Sat, 1 May 2021 00:39:00 GMT From: Konstantin Belousov <kib@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org Subject: git: 941e3cd8239a - stable/12 - linuxkpi: drop single-use variable Message-ID: <202105010039.1410d0cd048036@gitrepo.freebsd.org>
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The branch stable/12 has been updated by kib: URL: https://cgit.FreeBSD.org/src/commit/?id=941e3cd8239a41c40448f218bd68ddf7fd0ea87b commit 941e3cd8239a41c40448f218bd68ddf7fd0ea87b Author: Konstantin Belousov <kib@FreeBSD.org> AuthorDate: 2021-03-30 08:46:42 +0000 Commit: Konstantin Belousov <kib@FreeBSD.org> CommitDate: 2021-05-01 00:38:29 +0000 linuxkpi: drop single-use variable (cherry picked from commit 8011fb795baa59ba14371d6db5ab661a5db77615) --- sys/compat/linuxkpi/common/src/linux_compat.c | 4 +-- sys/compat/linuxkpi/common/src/linux_compat.c.orig | 31 ++++++++++++++-------- 2 files changed, 21 insertions(+), 14 deletions(-) diff --git a/sys/compat/linuxkpi/common/src/linux_compat.c b/sys/compat/linuxkpi/common/src/linux_compat.c index 4a734bb495ce..7175c0f87364 100644 --- a/sys/compat/linuxkpi/common/src/linux_compat.c +++ b/sys/compat/linuxkpi/common/src/linux_compat.c @@ -2212,16 +2212,14 @@ linux_cdev_static_release(struct kobject *kobj) { struct cdev *cdev; struct linux_cdev *ldev; - struct kobject *parent; ldev = container_of(kobj, struct linux_cdev, kobj); - parent = kobj->parent; cdev = ldev->cdev; if (cdev != NULL) { destroy_dev(cdev); ldev->cdev = NULL; } - kobject_put(parent); + kobject_put(kobj->parent); } void diff --git a/sys/compat/linuxkpi/common/src/linux_compat.c.orig b/sys/compat/linuxkpi/common/src/linux_compat.c.orig index 71ea7e0844dc..28413c59bb76 100644 --- a/sys/compat/linuxkpi/common/src/linux_compat.c.orig +++ b/sys/compat/linuxkpi/common/src/linux_compat.c.orig @@ -717,15 +717,19 @@ linux_get_fop(struct linux_file *filp, const struct file_operations **fop, ldev = filp->f_cdev; *fop = filp->f_op; if (ldev != NULL) { - for (siref = ldev->siref;;) { - if ((siref & LDEV_SI_DTR) != 0) { - ldev = &dummy_ldev; - siref = ldev->siref; - *fop = ldev->ops; - MPASS((ldev->siref & LDEV_SI_DTR) == 0); - } else if (atomic_fcmpset_int(&ldev->siref, &siref, - siref + LDEV_SI_REF)) { - break; + if (ldev->kobj.ktype == &linux_cdev_static_ktype) { + refcount_acquire(&ldev->refs); + } else { + for (siref = ldev->siref;;) { + if ((siref & LDEV_SI_DTR) != 0) { + ldev = &dummy_ldev; + *fop = ldev->ops; + siref = ldev->siref; + MPASS((ldev->siref & LDEV_SI_DTR) == 0); + } else if (atomic_fcmpset_int(&ldev->siref, + &siref, siref + LDEV_SI_REF)) { + break; + } } } } @@ -738,8 +742,13 @@ linux_drop_fop(struct linux_cdev *ldev) if (ldev == NULL) return; - MPASS((ldev->siref & ~LDEV_SI_DTR) != 0); - atomic_subtract_int(&ldev->siref, LDEV_SI_REF); + if (ldev->kobj.ktype == &linux_cdev_static_ktype) { + linux_cdev_deref(ldev); + } else { + MPASS(ldev->kobj.ktype == &linux_cdev_ktype); + MPASS((ldev->siref & ~LDEV_SI_DTR) != 0); + atomic_subtract_int(&ldev->siref, LDEV_SI_REF); + } } #define OPW(fp,td,code) ({ \
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