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Switch to pthread_mutex_t for spinlocks, too

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This fixes an observed journal deadlock - real spinlocks aren't safe in
userspace.
This commit is contained in:
Kent Overstreet 2022-02-18 05:58:24 -05:00
parent a1e928af83
commit cc1a99fb74
1 changed files with 6 additions and 6 deletions
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12
include/linux/spinlock.h
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@ -2,27 +2,27 @@
#define __TOOLS_LINUX_SPINLOCK_H #define __TOOLS_LINUX_SPINLOCK_H
#include <linux/atomic.h> #include <linux/atomic.h>
#include <pthread.h>
typedef struct { typedef struct {
int count; pthread_mutex_t lock;
} raw_spinlock_t; } raw_spinlock_t;
#define __RAW_SPIN_LOCK_UNLOCKED(name) (raw_spinlock_t) { .count = 0 } #define __RAW_SPIN_LOCK_UNLOCKED(name) (raw_spinlock_t) { .lock = PTHREAD_MUTEX_INITIALIZER }
static inline void raw_spin_lock_init(raw_spinlock_t *lock) static inline void raw_spin_lock_init(raw_spinlock_t *lock)
{ {
smp_store_release(&lock->count, 0); pthread_mutex_init(&lock->lock, NULL);
} }
static inline void raw_spin_lock(raw_spinlock_t *lock) static inline void raw_spin_lock(raw_spinlock_t *lock)
{ {
while (xchg_acquire(&lock->count, 1)) pthread_mutex_lock(&lock->lock);
;
} }
static inline void raw_spin_unlock(raw_spinlock_t *lock) static inline void raw_spin_unlock(raw_spinlock_t *lock)
{ {
smp_store_release(&lock->count, 0); pthread_mutex_unlock(&lock->lock);
} }
#define raw_spin_lock_irq(lock) raw_spin_lock(lock) #define raw_spin_lock_irq(lock) raw_spin_lock(lock)