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343dd246fd
Introduce 'struct xe_oa_fence' which includes the dma_fence used to signal
output fences in the xe_sync array. The fences are signaled
asynchronously. When there are no output fences to signal, the OA
configuration wait is synchronously re-introduced into the ioctl.
v2: Don't wait in the work, use callback + delayed work (Matt B)
Use a single, not a per-fence spinlock (Matt Brost)
v3: Move ofence alloc before job submission (Matt)
Assert, don't fail, from dma_fence_add_callback (Matt)
Additional dma_fence_get for dma_fence_wait (Matt)
Change dma_fence_wait to non-interruptible (Matt)
v4: Introduce last_fence to prevent uaf if stream is closed with
pending OA config jobs
v5: Remove oa_fence_lock, move spinlock back into xe_oa_fence to
prevent uaf
Suggested-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Jonathan Cavitt <jonathan.cavitt@intel.com>
Signed-off-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241022200352.1192560-5-ashutosh.dixit@intel.com
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.