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| author | Leo Yan <leo.yan@arm.com> | 2026-05-15 21:08:21 +0100 |
|---|---|---|
| committer | Suzuki K Poulose <suzuki.poulose@arm.com> | 2026-05-18 10:18:46 +0100 |
| commit | 3b6e3e04659a7e32cfbf71d6958eb6318bae50c0 (patch) | |
| tree | 3aefd9ba731311140b32826de0460eac4bfbbcad /scripts/patch-kernel | |
| parent | 81bf1c33f6a7b2be8523e8b3655b85ca959975cf (diff) | |
coresight: syscfg: Use IRQ-safe spinlock to protect active variables
cscfg_config_sysfs_get_active_cfg() will be used from idle flows, while
sleeping locks are not allowed. Introduce sysfs_store_lock to replace
the mutex to protect sysfs_active_config and sysfs_active_preset
accesses, with IRQ-safe locking to avoid lockdep complaint.
Refactor cscfg_config_sysfs_activate() to use spinlock for
sysfs_active_config and activate/deactivate config.
Tested-by: Jie Gan <jie.gan@oss.qualcomm.com>
Reviewed-by: Yeoreum Yun <yeoreum.yun@arm.com>
Reviewed-by: James Clark <james.clark@linaro.org>
Tested-by: James Clark <james.clark@linaro.org>
Signed-off-by: Leo Yan <leo.yan@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20260515-arm_coresight_path_power_management_improvement-v14-14-f88c4a3ecfe9@arm.com
Diffstat (limited to 'scripts/patch-kernel')
0 files changed, 0 insertions, 0 deletions