LinuxKPI: add seq_hex_dump()

Move the implementation of print_hex_dump() into linux_compat.c as
lkpi_hex_dump() taking an extra function pointer and argument.
Add two internal wrappers for printf an

LinuxKPI: add seq_hex_dump()

Move the implementation of print_hex_dump() into linux_compat.c as
lkpi_hex_dump() taking an extra function pointer and argument.
Add two internal wrappers for printf and sbuf_printf to get a common
function definition (sbuf_printf takes the extra argument).

Use these to implement print_hex_dump() and the newly added
seq_hex_dump().

This allows us to re-use the same implementation of print_hex_dump()
for both functions without duplicating the code.

Initial implementation: D49381 by dumbbell
Sponsored by: The FreeBSD Foundation
MFC after: 3 days
Reviewed by: dumbbell
Differential Revision: https://reviews.freebsd.org/D49637

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LinuxKPI: add no_printk

Add a version of no_printk(), which seems to be there to have format
string checking while never calling the printk. It seems a very weird
thing and it needs a return code a

LinuxKPI: add no_printk

Add a version of no_printk(), which seems to be there to have format
string checking while never calling the printk. It seems a very weird
thing and it needs a return code and for some reason my initial
while (0) { } version hadn't worked while porting over new code but
could have been further downstream format string problems.
if (0) seems to do the job though I would have expected that to more
likely simply get optimised out without any futher format checking.

Sponsored by: The FreeBSD Foundation
MFC after: 3 days
Reviewed by: emaste
Differential Revision: https://reviews.freebsd.org/D46463

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sys: Remove $FreeBSD$: two-line .h pattern

Remove /^\s*\*\n \*\s+\$FreeBSD\$$\n/

LinuxKPI: Constantly use _LINUXKPI_ prefix in include guards

MFC after: 1 week
Reviewed by: bz, emaste, hselasky, manu
Differential Revision: https://reviews.freebsd.org/D33562

linuxkpi: Fix build from redefined pr_err_once()

linuxkpi: Include pr_err_once() in printk.h

Approved by: bz (src), hselasky (src)
Differential Reivison: https://reviews.freebsd.org/D30687

Use the 't' modifier to print a ptrdiff_t.

Reviewed by: imp
Obtained from: CheriBSD
Sponsored by: DARPA
Differential Revision: https://reviews.freebsd.org/D27576

MFHead @347527

Sponsored by: The FreeBSD Foundation

Implement print_hex_dump_debug() function macro in the LinuxKPI.

Build tested drm-current-kmod prior to commit.

MFC after: 1 week
Submitted by: slavash@
Sponsored by: Mellanox Technologies

MFHead@r345275

Implement pr_info_ratelimited() function macro in the LinuxKPI.

Submitted by: Johannes Lundberg <johalun0@gmail.com>
MFC after: 1 week
Sponsored by: Limelight Networks
Sponsored by: Mellanox Tec

Implement pr_info_ratelimited() function macro in the LinuxKPI.

Submitted by: Johannes Lundberg <johalun0@gmail.com>
MFC after: 1 week
Sponsored by: Limelight Networks
Sponsored by: Mellanox Technologies

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Implement pr_err_ratelimited() function macro in the LinuxKPI.

MFC after: 1 week
Submitted by: Johannes Lundberg <johalun0@gmail.com>
Sponsored by: Mellanox Technologies
Sponsored by: Limelight Netw

Implement pr_err_ratelimited() function macro in the LinuxKPI.

MFC after: 1 week
Submitted by: Johannes Lundberg <johalun0@gmail.com>
Sponsored by: Mellanox Technologies
Sponsored by: Limelight Networks

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Add support for printk_ratelimit() function macro and improve the existing
printk_ratelimited() function macro to return a boolean stating if there
was a printout, true, or not, false.

MFC after: 1

Add support for printk_ratelimit() function macro and improve the existing
printk_ratelimited() function macro to return a boolean stating if there
was a printout, true, or not, false.

MFC after: 1 week
Submitted by: Johannes Lundberg <johalun0@gmail.com>
Sponsored by: Mellanox Technologies

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Merge ^/head r319251 through r319479.

Implement print_hex_dump(), print_hex_dump_bytes() and
printk_ratelimited() in the LinuxKPI.

While at it fix the inclusion guard of printk.h to be similar to the
rest of the LinuxKPI header files.

Implement print_hex_dump(), print_hex_dump_bytes() and
printk_ratelimited() in the LinuxKPI.

While at it fix the inclusion guard of printk.h to be similar to the
rest of the LinuxKPI header files.

MFC after: 1 week
Sponsored by: Mellanox Technologies

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MFH r289384-r293170

Sponsored by: The FreeBSD Foundation

Catch up with head (r291075).

Merge from head

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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