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Commit 518f167a authored by Boaz Harrosh's avatar Boaz Harrosh
Browse files

exofs: Micro-optimize exofs_i_info 



optimize the exofs_i_info struct usage by moving the embedded
vfs_inode to be first. A compiler might optimize away an "add"
operation with constant zero. (Which it cannot with other constants)

Signed-off-by: default avatarBoaz Harrosh <bharrosh@panasas.com>
parent 34ce4e7c

fs/exofs/exofs.h

+2 −2
Original line number Diff line number Diff line
@@ -78,13 +78,13 @@ struct exofs_sb_info { 
 * our extension to the in-memory inode

 */

struct exofs_i_info {

	struct inode   vfs_inode;          /* normal in-memory inode          */

	wait_queue_head_t i_wq;            /* wait queue for inode            */

	unsigned long  i_flags;            /* various atomic flags            */

	uint32_t       i_data[EXOFS_IDATA];/*short symlink names and device #s*/

	uint32_t       i_dir_start_lookup; /* which page to start lookup      */

	wait_queue_head_t i_wq;            /* wait queue for inode            */

	uint64_t       i_commit_size;      /* the object's written length     */

	uint8_t        i_cred[OSD_CAP_LEN];/* all-powerful credential         */

	struct inode   vfs_inode;          /* normal in-memory inode          */

};



static inline osd_id exofs_oi_objno(struct exofs_i_info *oi)