| Message ID | 20231122085118.177589-1-ben.dooks@codethink.co.uk |
|---|---|
| State | New |
| Headers | show |
| Series | watchdog: starfive: add lock annotations to fix context imbalances | expand |
On Wed, Nov 22, 2023 at 08:51:18AM +0000, Ben Dooks wrote: > Add the necessary __acquires() and __releases() to the functions > that take and release the wdt lock to avoid the following sparse > warnings: > > drivers/watchdog/starfive-wdt.c:204:13: warning: context imbalance in 'starfive_wdt_unlock' - wrong count at exit > drivers/watchdog/starfive-wdt.c:212:9: warning: context imbalance in 'starfive_wdt_lock' - unexpected unlock > > Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk> Reviewed-by: Guenter Roeck <linux@roeck-us.net> > --- > drivers/watchdog/starfive-wdt.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/drivers/watchdog/starfive-wdt.c b/drivers/watchdog/starfive-wdt.c > index 5f501b41faf9..49b38ecc092d 100644 > --- a/drivers/watchdog/starfive-wdt.c > +++ b/drivers/watchdog/starfive-wdt.c > @@ -202,12 +202,14 @@ static u32 starfive_wdt_ticks_to_sec(struct starfive_wdt *wdt, u32 ticks) > > /* Write unlock-key to unlock. Write other value to lock. */ > static void starfive_wdt_unlock(struct starfive_wdt *wdt) > + __acquires(&wdt->lock) > { > spin_lock(&wdt->lock); > writel(wdt->variant->unlock_key, wdt->base + wdt->variant->unlock); > } > > static void starfive_wdt_lock(struct starfive_wdt *wdt) > + __releases(&wdt->lock) > { > writel(~wdt->variant->unlock_key, wdt->base + wdt->variant->unlock); > spin_unlock(&wdt->lock); > -- > 2.37.2.352.g3c44437643 > >
diff --git a/drivers/watchdog/starfive-wdt.c b/drivers/watchdog/starfive-wdt.c index 5f501b41faf9..49b38ecc092d 100644 --- a/drivers/watchdog/starfive-wdt.c +++ b/drivers/watchdog/starfive-wdt.c @@ -202,12 +202,14 @@ static u32 starfive_wdt_ticks_to_sec(struct starfive_wdt *wdt, u32 ticks) /* Write unlock-key to unlock. Write other value to lock. */ static void starfive_wdt_unlock(struct starfive_wdt *wdt) + __acquires(&wdt->lock) { spin_lock(&wdt->lock); writel(wdt->variant->unlock_key, wdt->base + wdt->variant->unlock); } static void starfive_wdt_lock(struct starfive_wdt *wdt) + __releases(&wdt->lock) { writel(~wdt->variant->unlock_key, wdt->base + wdt->variant->unlock); spin_unlock(&wdt->lock);
Add the necessary __acquires() and __releases() to the functions that take and release the wdt lock to avoid the following sparse warnings: drivers/watchdog/starfive-wdt.c:204:13: warning: context imbalance in 'starfive_wdt_unlock' - wrong count at exit drivers/watchdog/starfive-wdt.c:212:9: warning: context imbalance in 'starfive_wdt_lock' - unexpected unlock Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk> --- drivers/watchdog/starfive-wdt.c | 2 ++ 1 file changed, 2 insertions(+)