LinuxKPI: change DECLARE_FLEX_ARRAY()

DECLARE_FLEX_ARRAY can be used inside a structure. On FreeBSD due to
-Wgnu-variable-sized-type-not-at-end this yields an error. Use [0]
instead of [] to overc

LinuxKPI: change DECLARE_FLEX_ARRAY()

DECLARE_FLEX_ARRAY can be used inside a structure. On FreeBSD due to
-Wgnu-variable-sized-type-not-at-end this yields an error. Use [0]
instead of [] to overcome this.

Sponsored by: The FreeBSD Foundation
Reviewed by: hselasky
Differential Revision: https://reviews.freebsd.org/D34350

(cherry picked from commit fab601c5b76a1183c1849222667481fdde948ef9)

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LinuxKPI: add kstrtoint_from_user() and DECLARE_FLEX_ARRAY()

Add an implementation of kstrtoint_from_user() based on the other
implementations and an attempt at DECLARE_FLEX_ARRAY() which works
for

LinuxKPI: add kstrtoint_from_user() and DECLARE_FLEX_ARRAY()

Add an implementation of kstrtoint_from_user() based on the other
implementations and an attempt at DECLARE_FLEX_ARRAY() which works
for the driver needing it.

Reviewed by: hselasky
Differential Revision: https://reviews.freebsd.org/D34231

(cherry picked from commit c840d5cec2607932d077ffcfee7ccf0a6b50cdf3)

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LinuxKPI: Use negative bit field size to trigger BUILD_BUG_ON_ZERO

compile time assertion on non-NULL pointers. Tests conducted show that
_Static_assert, negative array size method and current code

LinuxKPI: Use negative bit field size to trigger BUILD_BUG_ON_ZERO

compile time assertion on non-NULL pointers. Tests conducted show that
_Static_assert, negative array size method and current code does not
handle pointers well enough. Bit field method solves this problem.

This change is derrived from Linux implementation of BUILD_BUG_ON_ZERO.

MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D33674

(cherry picked from commit 64dab63f3b3b6c6a1f8a92f43bed0aa28319d627)

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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

(cherry picked from

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

(cherry picked from commit 307f78f3ed90a4145eeb2c8cc79bc95b2666f57a)

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LinuxKPI: Implement kstrtoull

Required by drm-kmod 5.7

MFC after: 1 week
Reviewed by: hselasky, manu
Differential Revision: https://reviews.freebsd.org/D33291

(cherry picked from commit c427456fd5

LinuxKPI: Implement kstrtoull

Required by drm-kmod 5.7

MFC after: 1 week
Reviewed by: hselasky, manu
Differential Revision: https://reviews.freebsd.org/D33291

(cherry picked from commit c427456fd560d6def83cd3867cc5bf01d20653e5)

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LinuxKPI: add hex2bin()

Add a hex2bin() implementation needed by a driver's debugfs code.

Reviewed by: hselasky
Differential Revision: https://reviews.freebsd.org/D33798

(cherry picked from commit

LinuxKPI: add hex2bin()

Add a hex2bin() implementation needed by a driver's debugfs code.

Reviewed by: hselasky
Differential Revision: https://reviews.freebsd.org/D33798

(cherry picked from commit deb9bfbd5bcea70c79f70c7091c35d399b40fb0a)

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LinuxKPI: add kstrtou8() and kstrtou8_from_user() to kernel.h

Analogous to the other sized version of kstrto[u]<type>() and
kstrtobool_from_user() add the "u8" versions needed by a driver.

(cherry

LinuxKPI: add kstrtou8() and kstrtou8_from_user() to kernel.h

Analogous to the other sized version of kstrto[u]<type>() and
kstrtobool_from_user() add the "u8" versions needed by a driver.

(cherry picked from commit b382b78503b56ad6b787b995b46418db27adaa61)

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LinuxKPI: Add sysctl(8) knob to control verbosity of WARN_ON's.

The purpose of this change is to reduce the amount of dmesg(8) noise when
VT switching after a panic.

Submitted by: Greg V <greg@unre

LinuxKPI: Add sysctl(8) knob to control verbosity of WARN_ON's.

The purpose of this change is to reduce the amount of dmesg(8) noise when
VT switching after a panic.

Submitted by: Greg V <[email protected]>
Differential Revision: https://reviews.freebsd.org/D30174
Sponsored by: NVIDIA Networking

(cherry picked from commit 2390a1441effaba0e3d0f2f447f448aaf20428f1)

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LinuxKPI: change BUILD_BUG_ON()

BUILD_BUG_ON() can be used inside functions where the definition to
CTASSERT() (_Static_assert()) seems to not work.
Go back to an old-style CTASSERT() implementation

LinuxKPI: change BUILD_BUG_ON()

BUILD_BUG_ON() can be used inside functions where the definition to
CTASSERT() (_Static_assert()) seems to not work.
Go back to an old-style CTASSERT() implementation but also add a
variable dclaration to avoid "unsued typedef" errors and dummy-use
the variable to avoid "unusued variable" errors. Given it is all
self-contained in a block and not used outside this should be
optimised away.

Sponsored by: The FreeBSD Foundation
Reviewed by: hselasky
Differential Revision: https://reviews.freebsd.org/D30431

(cherry picked from commit 1082490cd867a4d443862523c37ce947735342d0)

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LinuxKPI: extract stringify() in their own header file

Add linux/stringify.h as directly included by drivers. Remove the
definitions from compiler.h and include the new header in places
where the s

LinuxKPI: extract stringify() in their own header file

Add linux/stringify.h as directly included by drivers. Remove the
definitions from compiler.h and include the new header in places
where the stringify macros are already used without linuxkpi.

I have adjusted the Copyright of the new file according to the commit
originaly adding the macros (99e690772adbcb78c9e8441bedcf1913d72ea72f).

Sposnored by: The FreeBSD Foundation
Reviewed by: hselasky
Differential Revision: https://reviews.freebsd.org/D30440

(cherry picked from commit 43b4c00643bacb9d1ba3aa1022648104bc7ff4a2)

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LinuxKPI: add pr_err_once

Reviewed by: hselasky, emaste
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D30672

(cherry picked from commit 05c2d94a081d5948560a01c26c7f432960cde6

LinuxKPI: add pr_err_once

Reviewed by: hselasky, emaste
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D30672

(cherry picked from commit 05c2d94a081d5948560a01c26c7f432960cde606)

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linuxkpi: Add _RET_IP_ macro in kernel.h

This is needed by the drm-kmod 5.7 update.

Approved by: hselasky (src)
Differential Revision: https://reviews.freebsd.org/D30707

(cherry picked from commi

linuxkpi: Add _RET_IP_ macro in kernel.h

This is needed by the drm-kmod 5.7 update.

Approved by: hselasky (src)
Differential Revision: https://reviews.freebsd.org/D30707

(cherry picked from commit fee0d486ef34c6bd113ed743e33357ff626f2495)

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LinuxKPI: upstream a collection of drm-kmod conflicting changes

The upcoming in-kernel implementations for LinuxKPI based on work on
iwlwifi (and other wireless drivers) conflicts in a few places wi

LinuxKPI: upstream a collection of drm-kmod conflicting changes

The upcoming in-kernel implementations for LinuxKPI based on work on
iwlwifi (and other wireless drivers) conflicts in a few places with
the drm-kmod graphics work outside the base system.

In order to transition smoothly extract the conflicting bits.
This included "unaligned" accessor functions, sg_pcopy_from_buffer(),
IS_*() macros (to be further restricted in the future), power management
bits (possibly no longer conflicting with DRM), and other minor changes.

Obtained-from: bz_iwlwifi
Sponsored-by: The FreeBSD Foundation
MFC after: 3 days
Reviewed by: kib, hselasky, manu, bdragon (looked at earlier versions)
Differential Revision: https://reviews.freebsd.org/D26598

(cherry picked from commit 4abbf816bf06aa70200c5d1d976dd61c2752bdaf)

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Remove ifdefs around IS_ALIGNED() definition in the LinuxKPI.

Discussed with: manu@
MFC after: 1 week
Sponsored by: Mellanox Technologies // NVIDIA Networking

linuxkpi: Add taint* defines

This isn't used for us but allow us to port drivers more easily.

Reviewed by: hselasky
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freeb

linuxkpi: Add taint* defines

This isn't used for us but allow us to port drivers more easily.

Reviewed by: hselasky
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D25703

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Document the is_signed(), type_max() and type_min() function macros in the
LinuxKPI. Try to make the function argument more readable.

Suggested by: several
MFC after: 1 week
Sponsored by: Mellanox T

Document the is_signed(), type_max() and type_min() function macros in the
LinuxKPI. Try to make the function argument more readable.

Suggested by: several
MFC after: 1 week
Sponsored by: Mellanox Technologies

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Implement is_signed(), type_max() and type_min() function macros in the
LinuxKPI.

MFC after: 1 week
Sponsored by: Mellanox Technologies

Implement __is_constexpr() function macro in the LinuxKPI.
Bump the FreeBSD version.

MFC after: 1 week
Sponsored by: Mellanox Technologies

Implement struct_size() function macro in the LinuxKPI.

MFC after: 1 week
Sponsored by: Mellanox Technologies

Implement BUILD_BUG_ON_ZERO() in the LinuxKPI.
Tested using gcc and clang.

MFC after: 1 week
Sponsored by: Mellanox Technologies

linuxkpi: Add kstrtou16

This function convert a char * to a u16.
Simply use strtoul and cast to compare for ERANGE

Sponsored-by: The FreeBSD Foundation
Reviewed by: hselasky
Differential Revision:

linuxkpi: Add kstrtou16

This function convert a char * to a u16.
Simply use strtoul and cast to compare for ERANGE

Sponsored-by: The FreeBSD Foundation
Reviewed by: hselasky
Differential Revision: https://reviews.freebsd.org/D24996

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linuxkpi: Add offsetofend macro

This calculate the offset of the end of the member in the given struct.
Needed by DRM in Linux v5.3

Sponsored-by: The FreeBSD Foudation
Differential Revision: https:

linuxkpi: Add offsetofend macro

This calculate the offset of the end of the member in the given struct.
Needed by DRM in Linux v5.3

Sponsored-by: The FreeBSD Foudation
Differential Revision: https://reviews.freebsd.org/D24849

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linuxkpi: print stack trace in WARN_ON macros

Reviewed by: hselasky, kib
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D24779

Implement kstrtou64() in the LinuxKPI.

Submitted by: ashafer_badland.io (Austin Shafer)
MFC after: 1 week
Sponsored by: Mellanox Technologies

LinuxKPI: Add helper macros IS_ALIGNED and DIV_ROUND_DOWN_ULL.

This patch is part of D19565

Reviewed by: hps
Approved by: imp (mentor), hps
MFC after: 1 week