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Differential D48762

linuxkpi: Don't destroy the mutex in `xa_destroy()`
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Authored by dumbbell on Fri, Jan 31, 2:29 PM.

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rGe5764cf07588: linuxkpi: Don't destroy the mutex in `xa_destroy()`

Summary

Why

The mutex initialized in xa_init_flags() is not destroyed here on purpose. The reason is that on Linux, the xarray remains usable after a call to xa_destroy(). For instance the i915 DRM driver relies on that during the initialixation of its GuC. Basically, xa_destroy() "resets" the structure to zero but doesn't really destroy it.

This is part of the update of DRM drivers to Linux 6.7.

Sponsored by: The FreeBSD Foundation

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Event Timeline

dumbbell created this revision.Fri, Jan 31, 2:29 PM

Herald added subscribers: emaste, imp. · View Herald TranscriptFri, Jan 31, 2:29 PM

dumbbell requested review of this revision.Fri, Jan 31, 2:29 PM

manu accepted this revision.Fri, Jan 31, 2:42 PM

This revision is now accepted and ready to land.Fri, Jan 31, 2:42 PM

Closed by commit rGe5764cf07588: linuxkpi: Don't destroy the mutex in `xa_destroy()` (authored by dumbbell). · Explain WhyFri, Jan 31, 4:04 PM

This revision was automatically updated to reflect the committed changes.

dumbbell added a commit: rGe5764cf07588: linuxkpi: Don't destroy the mutex in `xa_destroy()`.

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sys/

compat/

linuxkpi/

common/

src/

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Diff 150258

sys/compat/linuxkpi/common/src/linux_xarray.c

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