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authorMadhuparna Bhowmik <madhuparnabhowmik10@gmail.com>2020-02-28 18:47:45 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2020-03-18 14:13:33 +0100
commit8ba88804bb3b877c841bc1864a8605111580cd0b (patch)
treef7b553dea834517c2db59011b62bd07d62e0fe71 /drivers/base
parentcomponent: allow missing unbind callback (diff)
downloadlinux-8ba88804bb3b877c841bc1864a8605111580cd0b.tar.xz
linux-8ba88804bb3b877c841bc1864a8605111580cd0b.zip
drivers: base: power: wakeup.c: Use built-in RCU list checking
Pass cond argument to list_for_each_entry_rcu() to fix the following false positive lockdep warning and other uses of list_for_each_entry_rcu() in wakeup.c. [ 331.934648] ============================= [ 331.934650] WARNING: suspicious RCU usage [ 331.934653] 5.6.0-rc1+ #5 Not tainted [ 331.934655] ----------------------------- [ 331.934657] drivers/base/power/wakeup.c:408 RCU-list traversed in non-reader section!! [ 333.025156] ============================= [ 333.025161] WARNING: suspicious RCU usage [ 333.025168] 5.6.0-rc1+ #5 Not tainted [ 333.025173] ----------------------------- [ 333.025180] drivers/base/power/wakeup.c:424 RCU-list traversed in non-reader section!! Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net> Signed-off-by: Madhuparna Bhowmik <madhuparnabhowmik10@gmail.com> Link: https://lore.kernel.org/r/20200228174745.9308-1-madhuparnabhowmik10@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/base')
-rw-r--r--drivers/base/power/wakeup.c15
1 files changed, 10 insertions, 5 deletions
diff --git a/drivers/base/power/wakeup.c b/drivers/base/power/wakeup.c
index 27f3e60608e5..d9fefc65ac34 100644
--- a/drivers/base/power/wakeup.c
+++ b/drivers/base/power/wakeup.c
@@ -405,7 +405,8 @@ void device_wakeup_arm_wake_irqs(void)
int srcuidx;
srcuidx = srcu_read_lock(&wakeup_srcu);
- list_for_each_entry_rcu(ws, &wakeup_sources, entry)
+ list_for_each_entry_rcu(ws, &wakeup_sources, entry,
+ srcu_read_lock_held(&wakeup_srcu))
dev_pm_arm_wake_irq(ws->wakeirq);
srcu_read_unlock(&wakeup_srcu, srcuidx);
}
@@ -421,7 +422,8 @@ void device_wakeup_disarm_wake_irqs(void)
int srcuidx;
srcuidx = srcu_read_lock(&wakeup_srcu);
- list_for_each_entry_rcu(ws, &wakeup_sources, entry)
+ list_for_each_entry_rcu(ws, &wakeup_sources, entry,
+ srcu_read_lock_held(&wakeup_srcu))
dev_pm_disarm_wake_irq(ws->wakeirq);
srcu_read_unlock(&wakeup_srcu, srcuidx);
}
@@ -874,7 +876,8 @@ void pm_print_active_wakeup_sources(void)
struct wakeup_source *last_activity_ws = NULL;
srcuidx = srcu_read_lock(&wakeup_srcu);
- list_for_each_entry_rcu(ws, &wakeup_sources, entry) {
+ list_for_each_entry_rcu(ws, &wakeup_sources, entry,
+ srcu_read_lock_held(&wakeup_srcu)) {
if (ws->active) {
pm_pr_dbg("active wakeup source: %s\n", ws->name);
active = 1;
@@ -1025,7 +1028,8 @@ void pm_wakep_autosleep_enabled(bool set)
int srcuidx;
srcuidx = srcu_read_lock(&wakeup_srcu);
- list_for_each_entry_rcu(ws, &wakeup_sources, entry) {
+ list_for_each_entry_rcu(ws, &wakeup_sources, entry,
+ srcu_read_lock_held(&wakeup_srcu)) {
spin_lock_irq(&ws->lock);
if (ws->autosleep_enabled != set) {
ws->autosleep_enabled = set;
@@ -1104,7 +1108,8 @@ static void *wakeup_sources_stats_seq_start(struct seq_file *m,
}
*srcuidx = srcu_read_lock(&wakeup_srcu);
- list_for_each_entry_rcu(ws, &wakeup_sources, entry) {
+ list_for_each_entry_rcu(ws, &wakeup_sources, entry,
+ srcu_read_lock_held(&wakeup_srcu)) {
if (n-- <= 0)
return ws;
}