diff options
| author | Johan Hovold <johan+linaro@kernel.org> | 2023-02-13 13:42:50 +0300 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2023-02-13 22:31:24 +0300 |
| commit | 47d1932f37de99bae3345bb93f098ac8750ab0fb (patch) | |
| tree | d63790a43dd16739bb2c1dbb1c89d16d02967ecb /include/linux/irqdomain.h | |
| parent | 8932c32c3053accd50702b36e944ac2016cd103c (diff) | |
| download | linux-47d1932f37de99bae3345bb93f098ac8750ab0fb.tar.xz | |
irqdomain: Drop revmap mutex
The revmap mutex is essentially only used to maintain the integrity of
the radix tree during updates (lookups use RCU).
As the global irq_domain_mutex is now held in all paths that update the
revmap structures there is strictly no longer any need for the dedicated
mutex, which can be removed.
Drop the revmap mutex and add lockdep assertions to the revmap helpers
to make sure that the global lock is always held when updating the
revmap.
Tested-by: Hsin-Yi Wang <hsinyi@chromium.org>
Tested-by: Mark-PK Tsai <mark-pk.tsai@mediatek.com>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20230213104302.17307-9-johan+linaro@kernel.org
Diffstat (limited to 'include/linux/irqdomain.h')
| -rw-r--r-- | include/linux/irqdomain.h | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h index a372086750ca..16399de00b48 100644 --- a/include/linux/irqdomain.h +++ b/include/linux/irqdomain.h @@ -143,7 +143,6 @@ struct irq_domain_chip_generic; * Revmap data, used internally by the irq domain code: * @revmap_size: Size of the linear map table @revmap[] * @revmap_tree: Radix map tree for hwirqs that don't fit in the linear map - * @revmap_mutex: Lock for the revmap * @revmap: Linear table of irq_data pointers */ struct irq_domain { @@ -171,7 +170,6 @@ struct irq_domain { irq_hw_number_t hwirq_max; unsigned int revmap_size; struct radix_tree_root revmap_tree; - struct mutex revmap_mutex; struct irq_data __rcu *revmap[]; }; |