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| author | Paolo Bonzini <pbonzini@redhat.com> | 2020-05-13 19:14:05 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-05-13 19:14:05 +0300 |
| commit | 4aef2ec9022b217f74d0f4c9b84081f07cc223d9 (patch) | |
| tree | edf9bb9ca1f8ab6345c156a7e87aaed28939f66c /arch/parisc/include/asm/spinlock_types.h | |
| parent | 7c67f54661fcc8d141fb11abbab1739f32e13b03 (diff) | |
| parent | 37486135d3a7b03acc7755b63627a130437f066a (diff) | |
| download | linux-4aef2ec9022b217f74d0f4c9b84081f07cc223d9.tar.xz | |
Merge branch 'kvm-amd-fixes' into HEAD
Diffstat (limited to 'arch/parisc/include/asm/spinlock_types.h')
| -rw-r--r-- | arch/parisc/include/asm/spinlock_types.h | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/arch/parisc/include/asm/spinlock_types.h b/arch/parisc/include/asm/spinlock_types.h index 42979c5704dc..ca39ee350c3f 100644 --- a/arch/parisc/include/asm/spinlock_types.h +++ b/arch/parisc/include/asm/spinlock_types.h @@ -12,11 +12,19 @@ typedef struct { #endif } arch_spinlock_t; + +/* counter: + * Unlocked : 0x0100_0000 + * Read lock(s) : 0x00FF_FFFF to 0x01 (Multiple Readers decrement it) + * Write lock : 0x0, but only if prior value is "unlocked" 0x0100_0000 + */ typedef struct { - arch_spinlock_t lock; - volatile int counter; + arch_spinlock_t lock_mutex; + volatile unsigned int counter; } arch_rwlock_t; -#define __ARCH_RW_LOCK_UNLOCKED { __ARCH_SPIN_LOCK_UNLOCKED, 0 } +#define __ARCH_RW_LOCK_UNLOCKED__ 0x01000000 +#define __ARCH_RW_LOCK_UNLOCKED { .lock_mutex = __ARCH_SPIN_LOCK_UNLOCKED, \ + .counter = __ARCH_RW_LOCK_UNLOCKED__ } #endif |