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interconnect: Teach lockdep about icc_bw_lock order
commit 1361917030
upstream.
Teach lockdep that icc_bw_lock is needed in code paths that could
deadlock if they trigger reclaim.
Signed-off-by: Rob Clark <robdclark@chromium.org>
Link: https://lore.kernel.org/r/20230807171148.210181-8-robdclark@gmail.com
Signed-off-by: Georgi Djakov <djakov@kernel.org>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
parent
b93aeb6352
commit
0db211ec0f
1 changed files with 9 additions and 1 deletions
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@ -1145,13 +1145,21 @@ void icc_sync_state(struct device *dev)
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}
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}
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}
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mutex_unlock(&icc_bw_lock);
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mutex_unlock(&icc_lock);
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}
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EXPORT_SYMBOL_GPL(icc_sync_state);
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static int __init icc_init(void)
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{
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struct device_node *root = of_find_node_by_path("/");
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struct device_node *root;
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/* Teach lockdep about lock ordering wrt. shrinker: */
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fs_reclaim_acquire(GFP_KERNEL);
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might_lock(&icc_bw_lock);
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fs_reclaim_release(GFP_KERNEL);
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root = of_find_node_by_path("/");
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providers_count = of_count_icc_providers(root);
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of_node_put(root);
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