Messages in this thread Patch in this message | | | Date | Mon, 19 Jun 2006 11:20:10 -0400 | Subject | [RFC] [PATCH 7/8] inode-diet: Use a union for i_blocks and i_size, i_rdev and i_devices | From | Theodore Tso <> |
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The i_blocks and i_size fields are only used for regular files. So we move them into the union, along with i_rdev and i_devices, which are only used by block or character devices.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Index: linux-2.6.17/include/linux/fs.h =================================================================== --- linux-2.6.17.orig/include/linux/fs.h 2006-06-18 19:59:59.000000000 -0400 +++ linux-2.6.17/include/linux/fs.h 2006-06-19 07:29:36.000000000 -0400 @@ -486,15 +486,12 @@ unsigned int i_nlink; uid_t i_uid; gid_t i_gid; - dev_t i_rdev; loff_t i_size; struct timespec i_atime; struct timespec i_mtime; struct timespec i_ctime; unsigned int i_blkbits; unsigned long i_version; - blkcnt_t i_blocks; - unsigned short i_bytes; spinlock_t i_lock; /* i_blocks, i_bytes, maybe i_size */ struct mutex i_mutex; struct rw_semaphore i_alloc_sem; @@ -507,11 +504,20 @@ #ifdef CONFIG_QUOTA struct dquot *i_dquot[MAXQUOTAS]; #endif - struct list_head i_devices; union { struct pipe_inode_info *i_pipe; - struct block_device *i_bdev; - struct cdev *i_cdev; + struct { + union { + struct block_device *i_bdev; + struct cdev *i_cdev; + }; + dev_t i_rdev; + struct list_head i_devices; + }; + struct { + unsigned short i_bytes; + blkcnt_t i_blocks; + }; }; __u32 i_generation; -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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