[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [PATCH block/for-next v2 01/16] block: add a new helper to get inode from block_device
From: Yu Kuai <yukuai3@xxxxxxxxxx> block_devcie is allocated from bdev_alloc() by bdev_alloc_inode(), and currently block_device contains a pointer that point to the address of inode, while such inode is allocated together: bdev_alloc inode = new_inode() // inode is &bdev_inode->vfs_inode bdev = I_BDEV(inode) // bdev is &bdev_inode->bdev bdev->inode = inode Add a new helper to get address of inode from bdev by add operation instead of memory access, which is more efficiency. Signed-off-by: Yu Kuai <yukuai3@xxxxxxxxxx> --- block/bdev.c | 5 ----- include/linux/blk_types.h | 12 ++++++++++++ 2 files changed, 12 insertions(+), 5 deletions(-) diff --git a/block/bdev.c b/block/bdev.c index e4cfb7adb645..7509389095b7 100644 --- a/block/bdev.c +++ b/block/bdev.c @@ -30,11 +30,6 @@ #include "../fs/internal.h" #include "blk.h" -struct bdev_inode { - struct block_device bdev; - struct inode vfs_inode; -}; - static inline struct bdev_inode *BDEV_I(struct inode *inode) { return container_of(inode, struct bdev_inode, vfs_inode); diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h index d5c5e59ddbd2..06de8393dcd1 100644 --- a/include/linux/blk_types.h +++ b/include/linux/blk_types.h @@ -85,6 +85,18 @@ struct block_device { #define bdev_kobj(_bdev) \ (&((_bdev)->bd_device.kobj)) +struct bdev_inode { + struct block_device bdev; + struct inode vfs_inode; +}; + +static inline struct inode *bdev_inode(struct block_device *bdev) +{ + struct bdev_inode *bi = container_of(bdev, struct bdev_inode, bdev); + + return &bi->vfs_inode; +} + /* * Block error status values. See block/blk-core:blk_errors for the details. * Alpha cannot write a byte atomically, so we need to use 32-bit value. -- 2.39.2
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