LinuxKPI: Create `linux/util_macros.h`

[siri_racha.ca]

Summary

In new amdgpu patches, the for_each_if macro starts being used. It is defined in linux/util_macros.h. This macro begins being used in the amdgpu driver provided in Linux kernel version 6.12, and 6.14. The macro is gaurded to only be used if LINUXKPI_VERSION is above `

[dumbbell]

for_each_if() already exists in the DRM drivers. It was moved to <linux/util_macros.h> in Linux 6.15 (https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b2108fc82a0acda34388bff3e3ee3544013b1623). Therefore it will need to be wrapped with:

#if defined(LINUXKPI_VERSION) && LINUXKPI_VERSION >= 61500
#define for_each_if...
#endif

This is to avoid the risk of double definitions when used with DRM drivers from versions before 6.15.

sys/compat/linuxkpi/common/include/linux/pm.h

35 ↗

(On Diff #179264)

Linux doesn’t do that, even on e.g. 7.0.

When the macro was moved to <linux/util_macros.h>, <drm/drm_util.h> started to include it directly. There should be no need for this include.

[siri_racha.ca]

sys/compat/linuxkpi/common/include/linux/pm.h

35 ↗

(On Diff #179264)

Oh, I see. I originally made the patch the header wasn't there yet. I'm looking at Linux 6.18.4, and it seems to still include it here. Should I remove the include?

[siri_racha.ca]

Now guarded so it is only used if LinuxKPI version is abov 61500

[siri_racha.ca]

Previous diff was incorrect

[dumbbell]

sys/compat/linuxkpi/common/include/linux/util_macros.h

35

I believe the second part has reversed logic: for_each_if() should be defined here if LINUXKPI_VERSION >= 61500. Before that, it is defined in <drm/drm_util.h>.

The first part is fine.

[siri_racha.ca]

sys/compat/linuxkpi/common/include/linux/util_macros.h

35

Should be fixed

[siri_racha.ca]

Just bumping