MFC r351937:
LinuxKPI: Improve sysfs support.

- Add functions for creating and merging sysfs groups.
- Add sysfs_streq function to compare strings ignoring newline from the
sysctl userland call.
-

MFC r351937:
LinuxKPI: Improve sysfs support.

- Add functions for creating and merging sysfs groups.
- Add sysfs_streq function to compare strings ignoring newline from the
sysctl userland call.
- Add a call to sysfs_create_groups in device_add.
- Remove duplicate header include.
- Bump __FreeBSD_version.

Reviewed by: hselasky
Approved by: imp (mentor), hselasky

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MFC r351701:
LinuxKPI: Add sysfs create/remove functions that handles multiple files in one call.

Reviewed by: hps
Approved by: imp (mentor), hps

MFC r345105:
Honor SYSCTL function return values when creating sysfs nodes in the LinuxKPI.
Return proper error code upon failure.

Submitted by: Johannes Lundberg <[email protected]>
Sponsored by:

MFC r345105:
Honor SYSCTL function return values when creating sysfs nodes in the LinuxKPI.
Return proper error code upon failure.

Submitted by: Johannes Lundberg <[email protected]>
Sponsored by: Limelight Networks
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

Add macros for defining attribute groups and for WO and RW attributes.

Reviewed by: hselasky
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D11872

Remove the only user of sysctl_add_oid().

My plan is to change this function's prototype at some point in the
future to add a new label argument, which can be used to export all of
sysctl as metrics

Remove the only user of sysctl_add_oid().

My plan is to change this function's prototype at some point in the
future to add a new label argument, which can be used to export all of
sysctl as metrics that can be scraped by Prometheus. Switch over this
caller to use the macro wrapper counterpart.

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linuxkpi/sysfs.h: Cast arg2 through intptr_t to avoid GCC warning

The code compiles fine under Clang, but GCC on PPC is less permissive about
integer and pointer sizes. (An intmax_t is clearly *lar

linuxkpi/sysfs.h: Cast arg2 through intptr_t to avoid GCC warning

The code compiles fine under Clang, but GCC on PPC is less permissive about
integer and pointer sizes. (An intmax_t is clearly *large enough* to hold a
pointer value.)

Another follow-up to r290475.

Reported by: jhibbits
Sponsored by: EMC / Isilon Storage Division

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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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