website-struct

Struct: buffer_head

Status

Regular

• In 4.4: ✅

  struct buffer_head {
      long unsigned int b_state;
      struct buffer_head *b_this_page;
      struct page *b_page;
      sector_t b_blocknr;
      size_t b_size;
      char *b_data;
      struct block_device *b_bdev;
      bh_end_io_t *b_end_io;
      void *b_private;
      struct list_head b_assoc_buffers;
      struct address_space *b_assoc_map;
      atomic_t b_count;
  };
  

• In 4.8: ✅

  struct buffer_head {
      long unsigned int b_state;
      struct buffer_head *b_this_page;
      struct page *b_page;
      sector_t b_blocknr;
      size_t b_size;
      char *b_data;
      struct block_device *b_bdev;
      bh_end_io_t *b_end_io;
      void *b_private;
      struct list_head b_assoc_buffers;
      struct address_space *b_assoc_map;
      atomic_t b_count;
  };
  

• In 4.10: ✅

  struct buffer_head {
      long unsigned int b_state;
      struct buffer_head *b_this_page;
      struct page *b_page;
      sector_t b_blocknr;
      size_t b_size;
      char *b_data;
      struct block_device *b_bdev;
      bh_end_io_t *b_end_io;
      void *b_private;
      struct list_head b_assoc_buffers;
      struct address_space *b_assoc_map;
      atomic_t b_count;
  };
  

• In 4.13: ✅

  struct buffer_head {
      long unsigned int b_state;
      struct buffer_head *b_this_page;
      struct page *b_page;
      sector_t b_blocknr;
      size_t b_size;
      char *b_data;
      struct block_device *b_bdev;
      bh_end_io_t *b_end_io;
      void *b_private;
      struct list_head b_assoc_buffers;
      struct address_space *b_assoc_map;
      atomic_t b_count;
  };
  

• In 4.15: ✅

  struct buffer_head {
      long unsigned int b_state;
      struct buffer_head *b_this_page;
      struct page *b_page;
      sector_t b_blocknr;
      size_t b_size;
      char *b_data;
      struct block_device *b_bdev;
      bh_end_io_t *b_end_io;
      void *b_private;
      struct list_head b_assoc_buffers;
      struct address_space *b_assoc_map;
      atomic_t b_count;
  };
  

• In 4.18: ✅

  struct buffer_head {
      long unsigned int b_state;
      struct buffer_head *b_this_page;
      struct page *b_page;
      sector_t b_blocknr;
      size_t b_size;
      char *b_data;
      struct block_device *b_bdev;
      bh_end_io_t *b_end_io;
      void *b_private;
      struct list_head b_assoc_buffers;
      struct address_space *b_assoc_map;
      atomic_t b_count;
  };
  

• In 5.0: ✅

  struct buffer_head {
      long unsigned int b_state;
      struct buffer_head *b_this_page;
      struct page *b_page;
      sector_t b_blocknr;
      size_t b_size;
      char *b_data;
      struct block_device *b_bdev;
      bh_end_io_t *b_end_io;
      void *b_private;
      struct list_head b_assoc_buffers;
      struct address_space *b_assoc_map;
      atomic_t b_count;
  };
  

• In 5.3: ✅

  struct buffer_head {
      long unsigned int b_state;
      struct buffer_head *b_this_page;
      struct page *b_page;
      sector_t b_blocknr;
      size_t b_size;
      char *b_data;
      struct block_device *b_bdev;
      bh_end_io_t *b_end_io;
      void *b_private;
      struct list_head b_assoc_buffers;
      struct address_space *b_assoc_map;
      atomic_t b_count;
  };
  

• In 5.4: ✅

  struct buffer_head {
      long unsigned int b_state;
      struct buffer_head *b_this_page;
      struct page *b_page;
      sector_t b_blocknr;
      size_t b_size;
      char *b_data;
      struct block_device *b_bdev;
      bh_end_io_t *b_end_io;
      void *b_private;
      struct list_head b_assoc_buffers;
      struct address_space *b_assoc_map;
      atomic_t b_count;
  };
  

• In 5.8: ✅

  struct buffer_head {
      long unsigned int b_state;
      struct buffer_head *b_this_page;
      struct page *b_page;
      sector_t b_blocknr;
      size_t b_size;
      char *b_data;
      struct block_device *b_bdev;
      bh_end_io_t *b_end_io;
      void *b_private;
      struct list_head b_assoc_buffers;
      struct address_space *b_assoc_map;
      atomic_t b_count;
      spinlock_t b_uptodate_lock;
  };
  

• In 5.11: ✅

  struct buffer_head {
      long unsigned int b_state;
      struct buffer_head *b_this_page;
      struct page *b_page;
      sector_t b_blocknr;
      size_t b_size;
      char *b_data;
      struct block_device *b_bdev;
      bh_end_io_t *b_end_io;
      void *b_private;
      struct list_head b_assoc_buffers;
      struct address_space *b_assoc_map;
      atomic_t b_count;
      spinlock_t b_uptodate_lock;
  };
  

• In 5.13: ✅

  struct buffer_head {
      long unsigned int b_state;
      struct buffer_head *b_this_page;
      struct page *b_page;
      sector_t b_blocknr;
      size_t b_size;
      char *b_data;
      struct block_device *b_bdev;
      bh_end_io_t *b_end_io;
      void *b_private;
      struct list_head b_assoc_buffers;
      struct address_space *b_assoc_map;
      atomic_t b_count;
      spinlock_t b_uptodate_lock;
  };
  

• In 5.15: ✅

  struct buffer_head {
      long unsigned int b_state;
      struct buffer_head *b_this_page;
      struct page *b_page;
      sector_t b_blocknr;
      size_t b_size;
      char *b_data;
      struct block_device *b_bdev;
      bh_end_io_t *b_end_io;
      void *b_private;
      struct list_head b_assoc_buffers;
      struct address_space *b_assoc_map;
      atomic_t b_count;
      spinlock_t b_uptodate_lock;
  };
  

• In 5.19: ✅

  struct buffer_head {
      long unsigned int b_state;
      struct buffer_head *b_this_page;
      struct page *b_page;
      sector_t b_blocknr;
      size_t b_size;
      char *b_data;
      struct block_device *b_bdev;
      bh_end_io_t *b_end_io;
      void *b_private;
      struct list_head b_assoc_buffers;
      struct address_space *b_assoc_map;
      atomic_t b_count;
      spinlock_t b_uptodate_lock;
  };
  

• In 6.2: ✅

  struct buffer_head {
      long unsigned int b_state;
      struct buffer_head *b_this_page;
      struct page *b_page;
      sector_t b_blocknr;
      size_t b_size;
      char *b_data;
      struct block_device *b_bdev;
      bh_end_io_t *b_end_io;
      void *b_private;
      struct list_head b_assoc_buffers;
      struct address_space *b_assoc_map;
      atomic_t b_count;
      spinlock_t b_uptodate_lock;
  };
  

• In 6.5: ✅

  struct buffer_head {
      long unsigned int b_state;
      struct buffer_head *b_this_page;
      struct page *b_page;
      struct folio *b_folio;
      sector_t b_blocknr;
      size_t b_size;
      char *b_data;
      struct block_device *b_bdev;
      bh_end_io_t *b_end_io;
      void *b_private;
      struct list_head b_assoc_buffers;
      struct address_space *b_assoc_map;
      atomic_t b_count;
      spinlock_t b_uptodate_lock;
  };
  

• In 6.8: ✅

  struct buffer_head {
      long unsigned int b_state;
      struct buffer_head *b_this_page;
      struct page *b_page;
      struct folio *b_folio;
      sector_t b_blocknr;
      size_t b_size;
      char *b_data;
      struct block_device *b_bdev;
      bh_end_io_t *b_end_io;
      void *b_private;
      struct list_head b_assoc_buffers;
      struct address_space *b_assoc_map;
      atomic_t b_count;
      spinlock_t b_uptodate_lock;
  };
  

Arch

• In arm64: ✅

  struct buffer_head {
      long unsigned int b_state;
      struct buffer_head *b_this_page;
      struct page *b_page;
      sector_t b_blocknr;
      size_t b_size;
      char *b_data;
      struct block_device *b_bdev;
      bh_end_io_t *b_end_io;
      void *b_private;
      struct list_head b_assoc_buffers;
      struct address_space *b_assoc_map;
      atomic_t b_count;
  };
  

• In armhf: ✅

  struct buffer_head {
      long unsigned int b_state;
      struct buffer_head *b_this_page;
      struct page *b_page;
      sector_t b_blocknr;
      size_t b_size;
      char *b_data;
      struct block_device *b_bdev;
      bh_end_io_t *b_end_io;
      void *b_private;
      struct list_head b_assoc_buffers;
      struct address_space *b_assoc_map;
      atomic_t b_count;
  };
  

• In ppc64el: ✅

  struct buffer_head {
      long unsigned int b_state;
      struct buffer_head *b_this_page;
      struct page *b_page;
      sector_t b_blocknr;
      size_t b_size;
      char *b_data;
      struct block_device *b_bdev;
      bh_end_io_t *b_end_io;
      void *b_private;
      struct list_head b_assoc_buffers;
      struct address_space *b_assoc_map;
      atomic_t b_count;
  };
  

• In riscv64: ✅

  struct buffer_head {
      long unsigned int b_state;
      struct buffer_head *b_this_page;
      struct page *b_page;
      sector_t b_blocknr;
      size_t b_size;
      char *b_data;
      struct block_device *b_bdev;
      bh_end_io_t *b_end_io;
      void *b_private;
      struct list_head b_assoc_buffers;
      struct address_space *b_assoc_map;
      atomic_t b_count;
  };
  

Flavor

• In aws: ✅

  struct buffer_head {
      long unsigned int b_state;
      struct buffer_head *b_this_page;
      struct page *b_page;
      sector_t b_blocknr;
      size_t b_size;
      char *b_data;
      struct block_device *b_bdev;
      bh_end_io_t *b_end_io;
      void *b_private;
      struct list_head b_assoc_buffers;
      struct address_space *b_assoc_map;
      atomic_t b_count;
  };
  

• In azure: ✅

  struct buffer_head {
      long unsigned int b_state;
      struct buffer_head *b_this_page;
      struct page *b_page;
      sector_t b_blocknr;
      size_t b_size;
      char *b_data;
      struct block_device *b_bdev;
      bh_end_io_t *b_end_io;
      void *b_private;
      struct list_head b_assoc_buffers;
      struct address_space *b_assoc_map;
      atomic_t b_count;
  };
  

• In gcp: ✅

  struct buffer_head {
      long unsigned int b_state;
      struct buffer_head *b_this_page;
      struct page *b_page;
      sector_t b_blocknr;
      size_t b_size;
      char *b_data;
      struct block_device *b_bdev;
      bh_end_io_t *b_end_io;
      void *b_private;
      struct list_head b_assoc_buffers;
      struct address_space *b_assoc_map;
      atomic_t b_count;
  };
  

• In lowlatency: ✅

  struct buffer_head {
      long unsigned int b_state;
      struct buffer_head *b_this_page;
      struct page *b_page;
      sector_t b_blocknr;
      size_t b_size;
      char *b_data;
      struct block_device *b_bdev;
      bh_end_io_t *b_end_io;
      void *b_private;
      struct list_head b_assoc_buffers;
      struct address_space *b_assoc_map;
      atomic_t b_count;
  };
  

Differences

Regular

• No changes between 4.4 and 4.8 ✅
• No changes between 4.8 and 4.10 ✅
• No changes between 4.10 and 4.13 ✅
• No changes between 4.13 and 4.15 ✅
• No changes between 4.15 and 4.18 ✅
• No changes between 4.18 and 5.0 ✅
• No changes between 5.0 and 5.3 ✅
• No changes between 5.3 and 5.4 ✅
• Changed between 5.4 and 5.8 ⚠️

  • Field added. spinlock_t b_uptodate_lock
• No changes between 5.8 and 5.11 ✅
• No changes between 5.11 and 5.13 ✅
• No changes between 5.13 and 5.15 ✅
• No changes between 5.15 and 5.19 ✅
• No changes between 5.19 and 6.2 ✅
• Changed between 6.2 and 6.5 ⚠️

  • Field added. struct folio *b_folio
• No changes between 6.5 and 6.8 ✅

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 ✅