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| author | Waiman Long <[email protected]> | 2022-02-03 03:31:03 +0000 |
|---|---|---|
| committer | Tejun Heo <[email protected]> | 2022-02-03 15:59:01 +0000 |
| commit | 2bdfd2825c9662463371e6691b1a794e97fa36b4 (patch) | |
| tree | c677349e0e219e802f1c94ad20b75b9aca42a2c3 /drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c | |
| parent | cgroup-v1: Require capabilities to set release_agent (diff) | |
| download | kernel-2bdfd2825c9662463371e6691b1a794e97fa36b4.tar.gz kernel-2bdfd2825c9662463371e6691b1a794e97fa36b4.zip | |
cgroup/cpuset: Fix "suspicious RCU usage" lockdep warning
It was found that a "suspicious RCU usage" lockdep warning was issued
with the rcu_read_lock() call in update_sibling_cpumasks(). It is
because the update_cpumasks_hier() function may sleep. So we have
to release the RCU lock, call update_cpumasks_hier() and reacquire
it afterward.
Also add a percpu_rwsem_assert_held() in update_sibling_cpumasks()
instead of stating that in the comment.
Fixes: 4716909cc5c5 ("cpuset: Track cpusets that use parent's effective_cpus")
Signed-off-by: Waiman Long <[email protected]>
Tested-by: Phil Auld <[email protected]>
Reviewed-by: Phil Auld <[email protected]>
Signed-off-by: Tejun Heo <[email protected]>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c')
0 files changed, 0 insertions, 0 deletions