DepSurf

Struct: hmm

Status

Regular

• In 4.4: Absent ⚠️
• In 4.8: Absent ⚠️
• In 4.10: Absent ⚠️
• In 4.13: Absent ⚠️
• In 4.15: ✅

  struct hmm {
      struct mm_struct *mm;
      spinlock_t lock;
      atomic_t sequence;
      struct list_head ranges;
      struct list_head mirrors;
      struct mmu_notifier mmu_notifier;
      struct rw_semaphore mirrors_sem;
  };
  

• In 4.18: ✅

  struct hmm {
      struct mm_struct *mm;
      spinlock_t lock;
      atomic_t sequence;
      struct list_head ranges;
      struct list_head mirrors;
      struct mmu_notifier mmu_notifier;
      struct rw_semaphore mirrors_sem;
  };
  

• In 5.0: ✅

  struct hmm {
      struct mm_struct *mm;
      spinlock_t lock;
      struct list_head ranges;
      struct list_head mirrors;
      struct mmu_notifier mmu_notifier;
      struct rw_semaphore mirrors_sem;
  };
  

• In 5.3: ✅

  struct hmm {
      struct mm_struct *mm;
      struct kref kref;
      spinlock_t ranges_lock;
      struct list_head ranges;
      struct list_head mirrors;
      struct mmu_notifier mmu_notifier;
      struct rw_semaphore mirrors_sem;
      wait_queue_head_t wq;
      struct callback_head rcu;
      long int notifiers;
  };
  

• In 5.4: ✅

  struct hmm {
      struct mmu_notifier mmu_notifier;
      spinlock_t ranges_lock;
      struct list_head ranges;
      struct list_head mirrors;
      struct rw_semaphore mirrors_sem;
      wait_queue_head_t wq;
      long int notifiers;
  };
  

• In 5.8: Absent ⚠️
• In 5.11: Absent ⚠️
• In 5.13: Absent ⚠️
• In 5.15: Absent ⚠️
• In 5.19: Absent ⚠️
• In 6.2: Absent ⚠️
• In 6.5: Absent ⚠️
• In 6.8: Absent ⚠️

Arch

• In arm64: ✅

  struct hmm {
      struct mmu_notifier mmu_notifier;
      spinlock_t ranges_lock;
      struct list_head ranges;
      struct list_head mirrors;
      struct rw_semaphore mirrors_sem;
      wait_queue_head_t wq;
      long int notifiers;
  };
  

• In armhf: ✅

  struct hmm {
      struct mmu_notifier mmu_notifier;
      spinlock_t ranges_lock;
      struct list_head ranges;
      struct list_head mirrors;
      struct rw_semaphore mirrors_sem;
      wait_queue_head_t wq;
      long int notifiers;
  };
  

• In ppc64el: ✅

  struct hmm {
      struct mmu_notifier mmu_notifier;
      spinlock_t ranges_lock;
      struct list_head ranges;
      struct list_head mirrors;
      struct rw_semaphore mirrors_sem;
      wait_queue_head_t wq;
      long int notifiers;
  };
  

• In riscv64: ✅

  struct hmm {
      struct mmu_notifier mmu_notifier;
      spinlock_t ranges_lock;
      struct list_head ranges;
      struct list_head mirrors;
      struct rw_semaphore mirrors_sem;
      wait_queue_head_t wq;
      long int notifiers;
  };
  

Flavor

• In aws: ✅

  struct hmm {
      struct mmu_notifier mmu_notifier;
      spinlock_t ranges_lock;
      struct list_head ranges;
      struct list_head mirrors;
      struct rw_semaphore mirrors_sem;
      wait_queue_head_t wq;
      long int notifiers;
  };
  

• In azure: ✅

  struct hmm {
      struct mmu_notifier mmu_notifier;
      spinlock_t ranges_lock;
      struct list_head ranges;
      struct list_head mirrors;
      struct rw_semaphore mirrors_sem;
      wait_queue_head_t wq;
      long int notifiers;
  };
  

• In gcp: ✅

  struct hmm {
      struct mmu_notifier mmu_notifier;
      spinlock_t ranges_lock;
      struct list_head ranges;
      struct list_head mirrors;
      struct rw_semaphore mirrors_sem;
      wait_queue_head_t wq;
      long int notifiers;
  };
  

• In lowlatency: ✅

  struct hmm {
      struct mmu_notifier mmu_notifier;
      spinlock_t ranges_lock;
      struct list_head ranges;
      struct list_head mirrors;
      struct rw_semaphore mirrors_sem;
      wait_queue_head_t wq;
      long int notifiers;
  };
  

Differences

Regular

• No changes between 4.15 and 4.18 ✅
• Changed between 4.18 and 5.0 ⚠️

  • Field removed. atomic_t sequence
• Changed between 5.0 and 5.3 ⚠️

  • Field added. struct kref kref
  • Field added. spinlock_t ranges_lock
  • Field added. wait_queue_head_t wq
  • Field added. struct callback_head rcu
  • Field added. long int notifiers
  • Field removed. spinlock_t lock
• Changed between 5.3 and 5.4 ⚠️

  • Field removed. struct mm_struct *mm
  • Field removed. struct kref kref
  • Field removed. struct callback_head rcu

Arch

• No changes between amd64 and arm64 ✅
• No changes between amd64 and armhf ✅
• No changes between amd64 and ppc64el ✅
• No changes between amd64 and riscv64 ✅

Flavor

• No changes between generic and aws ✅
• No changes between generic and azure ✅
• No changes between generic and gcp ✅
• No changes between generic and lowlatency ✅