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...TICKET_BATCH<<TICKET_LOCK_INC_SHIFT) + 1) + +/* Ensure batch_size is always power of two */ +#define check_sane_mask() BUILD_BUG_ON((TICKET_BATCH & (TICKET_BATCH-1)) > 1) #define TICKET_SHIFT (sizeof(__ticket_t) * 8) diff --git a/arch/x86/kernel/kvm.c b/arch/x86/kernel/kvm.c index 3dd8e2c..28e4492 100644 --- a/arch/x86/kernel/kvm.c +++ b/arch/x86/kernel/kvm.c @@ -757,7 +757,8 @@ __visible void kvm_lock_spinning(struct arch_spinlock *lock, __ticket_t want) * check again make sure it didn't become free while * we weren't looking. */ - if (ACCESS_ONCE(lock->tickets....

...TICKET_BATCH<<TICKET_LOCK_INC_SHIFT) + 1) + +/* Ensure batch_size is always power of two */ +#define check_sane_mask() BUILD_BUG_ON((TICKET_BATCH & (TICKET_BATCH-1)) > 1) #define TICKET_SHIFT (sizeof(__ticket_t) * 8) diff --git a/arch/x86/kernel/kvm.c b/arch/x86/kernel/kvm.c index 3dd8e2c..28e4492 100644 --- a/arch/x86/kernel/kvm.c +++ b/arch/x86/kernel/kvm.c @@ -757,7 +757,8 @@ __visible void kvm_lock_spinning(struct arch_spinlock *lock, __ticket_t want) * check again make sure it didn't become free while * we weren't looking. */ - if (ACCESS_ONCE(lock->tickets....

v11->v12: - Based on PeterZ's version of the qspinlock patch (https://lkml.org/lkml/2014/6/15/63). - Incorporated many of the review comments from Konrad Wilk and Paolo Bonzini. - The pvqspinlock code is largely from my previous version with PeterZ's way of going from queue tail to head and his idea of using callee saved calls to KVM and XEN codes. v10->v11: - Use a

v11->v12: - Based on PeterZ's version of the qspinlock patch (https://lkml.org/lkml/2014/6/15/63). - Incorporated many of the review comments from Konrad Wilk and Paolo Bonzini. - The pvqspinlock code is largely from my previous version with PeterZ's way of going from queue tail to head and his idea of using callee saved calls to KVM and XEN codes. v10->v11: - Use a