diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/srcu.h | 12 | ||||
| -rw-r--r-- | include/linux/srcutree.h | 5 |
2 files changed, 11 insertions, 6 deletions
diff --git a/include/linux/srcu.h b/include/linux/srcu.h index 4fac088072c3..1a7840c1b87a 100644 --- a/include/linux/srcu.h +++ b/include/linux/srcu.h @@ -65,14 +65,14 @@ unsigned long start_poll_synchronize_srcu(struct srcu_struct *ssp); bool poll_state_synchronize_srcu(struct srcu_struct *ssp, unsigned long cookie); #ifdef CONFIG_NEED_SRCU_NMI_SAFE -int __srcu_read_lock_nmisafe(struct srcu_struct *ssp) __acquires(ssp); -void __srcu_read_unlock_nmisafe(struct srcu_struct *ssp, int idx) __releases(ssp); +int __srcu_read_lock_nmisafe(struct srcu_struct *ssp, bool chknmisafe) __acquires(ssp); +void __srcu_read_unlock_nmisafe(struct srcu_struct *ssp, int idx, bool chknmisafe) __releases(ssp); #else -static inline int __srcu_read_lock_nmisafe(struct srcu_struct *ssp) +static inline int __srcu_read_lock_nmisafe(struct srcu_struct *ssp, bool chknmisafe) { return __srcu_read_lock(ssp); } -static inline void __srcu_read_unlock_nmisafe(struct srcu_struct *ssp, int idx) +static inline void __srcu_read_unlock_nmisafe(struct srcu_struct *ssp, int idx, bool chknmisafe) { __srcu_read_unlock(ssp, idx); } @@ -192,7 +192,7 @@ static inline int srcu_read_lock_nmisafe(struct srcu_struct *ssp) __acquires(ssp int retval; if (IS_ENABLED(CONFIG_NEED_SRCU_NMI_SAFE)) - retval = __srcu_read_lock_nmisafe(ssp); + retval = __srcu_read_lock_nmisafe(ssp, true); else retval = __srcu_read_lock(ssp); rcu_lock_acquire(&(ssp)->dep_map); @@ -237,7 +237,7 @@ static inline void srcu_read_unlock_nmisafe(struct srcu_struct *ssp, int idx) WARN_ON_ONCE(idx & ~0x1); rcu_lock_release(&(ssp)->dep_map); if (IS_ENABLED(CONFIG_NEED_SRCU_NMI_SAFE)) - __srcu_read_unlock_nmisafe(ssp, idx); + __srcu_read_unlock_nmisafe(ssp, idx, true); else __srcu_read_unlock(ssp, idx); } diff --git a/include/linux/srcutree.h b/include/linux/srcutree.h index 0c4eca07d78d..1ef8f2a4884f 100644 --- a/include/linux/srcutree.h +++ b/include/linux/srcutree.h @@ -25,6 +25,7 @@ struct srcu_data { /* Read-side state. */ atomic_long_t srcu_lock_count[2]; /* Locks per CPU. */ atomic_long_t srcu_unlock_count[2]; /* Unlocks per CPU. */ + int srcu_nmi_safety; /* NMI-safe srcu_struct structure? */ /* Update-side state. */ spinlock_t __private lock ____cacheline_internodealigned_in_smp; @@ -42,6 +43,10 @@ struct srcu_data { struct srcu_struct *ssp; }; +#define SRCU_NMI_UNKNOWN 0x0 +#define SRCU_NMI_NMI_UNSAFE 0x1 +#define SRCU_NMI_NMI_SAFE 0x2 + /* * Node in SRCU combining tree, similar in function to rcu_data. */ |