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ANDROID: qcom: Add flush_delayed_fput to ABI

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When a kernel thread calls dma_buf_put() to release the last reference
to a dma-buf, fput_many() defers calling the release callback to a
workqueue. This means that if the same kernel thread later calls
dma_heap_buffer_alloc(), it has no guarantee that the memory from the
prior free is available, leading to random failures. As a short-term
workaround, call flush_delayed_fput() to ensure the free completes
synchronously.

Leaf changes summary: 1 artifact changed
Changed leaf types summary: 0 leaf type changed
Removed/Changed/Added functions summary: 0 Removed, 0 Changed, 1 Added function
Removed/Changed/Added variables summary: 0 Removed, 0 Changed, 0 Added variable

1 Added function:

  [A] 'function void flush_delayed_fput()'

Bug: 210598057
Change-Id: Id936aa0bcd410b23b12f4b922b676aa61a358b4c
Signed-off-by: Patrick Daly <quic_pdaly@quicinc.com>
This commit is contained in:
Patrick Daly
2021-12-13 22:54:29 -08:00
committed by Todd Kjos
parent 6976d861b5
commit afd403d142
2 changed files with 281 additions and 364 deletions
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644
android/abi_gki_aarch64.xml
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android/abi_gki_aarch64_qcom
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@@ -625,6 +625,7 @@
flow_rule_match_ports
flow_rule_match_vlan
flush_dcache_page
flush_delayed_fput
flush_delayed_work
flush_work
flush_workqueue