MFC r342628, r342670 (by cem):
Fix linux_destroy_dev() behaviour when there are still files open from
the destroying cdev.

Also bump __FreeBSD_version since struct linux_cdev size on i386 increased

MFC r342628, r342670 (by cem):
Fix linux_destroy_dev() behaviour when there are still files open from
the destroying cdev.

Also bump __FreeBSD_version since struct linux_cdev size on i386 increased
(this is unmergeable r342629 on HEAD).

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MFC r341518:
linuxkpi: Fix for use-after-free when tearing down character devices.

Make sure we hold a reference on the character device for every opened file
to prevent the character device to be f

MFC r341518:
linuxkpi: Fix for use-after-free when tearing down character devices.

Make sure we hold a reference on the character device for every opened file
to prevent the character device to be freed prematurely.

Sponsored by: Mellanox Technologies

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linuxkpi whitespace cleanup

Reviewed by: hselasky, markj
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D14807

Fix LinuxKPI regression after r321920. The mda_unit and si_drv0 fields are not
wide enough to hold the full 64-bit dev_t. Instead use the "dev" field in
the "linux_cdev" structure to store and lookup

Fix LinuxKPI regression after r321920. The mda_unit and si_drv0 fields are not
wide enough to hold the full 64-bit dev_t. Instead use the "dev" field in
the "linux_cdev" structure to store and lookup this value.

While at it remove superfluous use of parenthesis inside the
MAJOR(), MINOR() and MKDEV() macros in the LinuxKPI.

MFC after: 1 week
Sponsored by: Mellanox Technologies

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Implement register and unregister chrdev in the LinuxKPI.

Obtained from: kmacy @
MFC after: 1 week
Sponsored by: Mellanox Technologies

Use make_dev_s() instead of make_dev() to avoid race setting
"si_drv1". Convert panic() into regular error while at it.

Suggested by: jhb @
MFC after: 1 week
Sponsored by: Mellanox Technologies

Add support for "cdev_add_ext()" to the LinuxKPI.

Obtained from: kmacy @
MFC after: 1 week
Sponsored by: Mellanox Technologies

Minor LinuxKPI code cleanup:
- Declare some static functions in linux_compat.c instead if inside
various header files.
- Prefix FreeBSD local functions in the LinuxKPI with "linux_" to
avoid symb

Minor LinuxKPI code cleanup:
- Declare some static functions in linux_compat.c instead if inside
various header files.
- Prefix FreeBSD local functions in the LinuxKPI with "linux_" to
avoid symbol name conflicts in the future and to make debugging
easier.
- Make the "struct kobj_ktype" declaractions constant to shave off a
few bytes from the data segment.

MFC after: 1 week
Sponsored by: Mellanox Technologies

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Make the kobject refcounting compliant with Linux. Refcounting on the
parent kobject cannot be factored out and must be done by the kobject
consumers.

MFC after: 1 week
Sponsored by: Mellanox Techno

Make the kobject refcounting compliant with Linux. Refcounting on the
parent kobject cannot be factored out and must be done by the kobject
consumers.

MFC after: 1 week
Sponsored by: Mellanox Technologies

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Make all the LinuxKPI include files compile standalone.

Sponsored by: Mellanox Technologies

Finish process of moving the LinuxKPI module into the default kernel build.

- Move all files related to the LinuxKPI into sys/compat/linuxkpi and
its subfolders.
- Update sys/conf/files and some M

Finish process of moving the LinuxKPI module into the default kernel build.

- Move all files related to the LinuxKPI into sys/compat/linuxkpi and
its subfolders.
- Update sys/conf/files and some Makefiles to use new file locations.
- Added description of COMPAT_LINUXKPI to sys/conf/NOTES which in turn
adds the LinuxKPI to all LINT builds.
- The LinuxKPI can be added to the kernel by setting the
COMPAT_LINUXKPI option. The OFED kernel option no longer builds the
LinuxKPI into the kernel. This was done to keep the build rules for
the LinuxKPI in sys/conf/files simple.
- Extend the LinuxKPI module to include support for USB by moving the
Linux USB compat from usb.ko to linuxkpi.ko.
- Bump the FreeBSD_version.
- A universe kernel build has been done.

Reviewed by: np @ (cxgb and cxgbe related changes only)
Sponsored by: Mellanox Technologies

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