Gh0st
/
linux
mirror of https://github.com/torvalds/linux.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

PM: core: Annotate loops walking device links as _srcu 

Since SRCU is used for the protection of device link lists, the loops
over device link lists in multiple places in drivers/base/power/main.c
and in pm_runtime_get_suppliers() should be annotated as _srcu rather
than as _rcu which is the case currently.

Change the annotations accordingly.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://patch.msgid.link/2393512.ElGaqSPkdT@rafael.j.wysocki
This commit is contained in:
Rafael J. Wysocki 2025-09-02 15:43:50 +02:00
parent b320789d68
commit fdd9ae23bb
2 changed files with 11 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
drivers/base/power/main.c
View File

@ -40,8 +40,8 @@
typedef int (*pm_callback_t)(struct device *);
#define list_for_each_entry_rcu_locked(pos, head, member) \
list_for_each_entry_rcu(pos, head, member, \
#define list_for_each_entry_srcu_locked(pos, head, member) \
list_for_each_entry_srcu(pos, head, member, \
device_links_read_lock_held())
/*
@ -281,7 +281,7 @@ static void dpm_wait_for_suppliers(struct device *dev, bool async)
* callbacks freeing the link objects for the links in the list we're
* walking.
*/
list_for_each_entry_rcu_locked(link, &dev->links.suppliers, c_node)
list_for_each_entry_srcu_locked(link, &dev->links.suppliers, c_node)
if (READ_ONCE(link->status) != DL_STATE_DORMANT)
dpm_wait(link->supplier, async);
@ -338,7 +338,7 @@ static void dpm_wait_for_consumers(struct device *dev, bool async)
* continue instead of trying to continue in parallel with its
* unregistration).
*/
list_for_each_entry_rcu_locked(link, &dev->links.consumers, s_node)
list_for_each_entry_srcu_locked(link, &dev->links.consumers, s_node)
if (READ_ONCE(link->status) != DL_STATE_DORMANT)
dpm_wait(link->consumer, async);
@ -675,7 +675,7 @@ static void dpm_async_resume_subordinate(struct device *dev, async_func_t func)
idx = device_links_read_lock();
/* Start processing the device's "async" consumers. */
list_for_each_entry_rcu_locked(link, &dev->links.consumers, s_node)
list_for_each_entry_srcu_locked(link, &dev->links.consumers, s_node)
if (READ_ONCE(link->status) != DL_STATE_DORMANT)
dpm_async_with_cleanup(link->consumer, func);
@ -1330,7 +1330,7 @@ static void dpm_async_suspend_superior(struct device *dev, async_func_t func)
idx = device_links_read_lock();
/* Start processing the device's "async" suppliers. */
list_for_each_entry_rcu_locked(link, &dev->links.suppliers, c_node)
list_for_each_entry_srcu_locked(link, &dev->links.suppliers, c_node)
if (READ_ONCE(link->status) != DL_STATE_DORMANT)
dpm_async_with_cleanup(link->supplier, func);
@ -1384,7 +1384,7 @@ static void dpm_superior_set_must_resume(struct device *dev)
idx = device_links_read_lock();
list_for_each_entry_rcu_locked(link, &dev->links.suppliers, c_node)
list_for_each_entry_srcu_locked(link, &dev->links.suppliers, c_node)
link->supplier->power.must_resume = true;
device_links_read_unlock(idx);
@ -1813,7 +1813,7 @@ static void dpm_clear_superiors_direct_complete(struct device *dev)
idx = device_links_read_lock();
list_for_each_entry_rcu_locked(link, &dev->links.suppliers, c_node) {
list_for_each_entry_srcu_locked(link, &dev->links.suppliers, c_node) {
spin_lock_irq(&link->supplier->power.lock);
link->supplier->power.direct_complete = false;
spin_unlock_irq(&link->supplier->power.lock);
@ -2065,7 +2065,7 @@ static bool device_prepare_smart_suspend(struct device *dev)
idx = device_links_read_lock();
list_for_each_entry_rcu_locked(link, &dev->links.suppliers, c_node) {
list_for_each_entry_srcu_locked(link, &dev->links.suppliers, c_node) {
if (!device_link_test(link, DL_FLAG_PM_RUNTIME))
continue;

2
drivers/base/power/runtime.c
View File

@ -1903,7 +1903,7 @@ void pm_runtime_get_suppliers(struct device *dev)
idx = device_links_read_lock();
list_for_each_entry_rcu(link, &dev->links.suppliers, c_node,
list_for_each_entry_srcu(link, &dev->links.suppliers, c_node,
device_links_read_lock_held())
if (device_link_test(link, DL_FLAG_PM_RUNTIME)) {
link->supplier_preactivated = true;