We already own DEFINE_SHOW_ATTRIBUTE() helper macro for defining attribute for read-only file, but we found many of drivers also want a helper macro for read-write file too. So we add this helper macro to reduce duplicate code. Changes from v4: - Reduce the scope to scsi subsystem based on Andy's suggestion. - Remove unused macros in qla_dfs.c - Adjust some descriptions in commit. Changes from v3: - Add AI Viro's comment to v1->v2's revision description. - Fixed a spelling mistakes of "marco" to "macro". Changes from v2: - Fixed some spelling mistakes in commit. - Revision description are added for easy tracing. Changes from v1: - Rename DEFINE_STORE_ATTRIBUTE() to DEFINE_SHOW_STORE_ATTRIBUTE(). - AI Viro points out that he doesn't like the definition of macros like DEFINE_SHOW_ATTRIBUTE. Luo Jiaxing (3): seq_file: Add helper macro to define attribute for rw file scsi: hisi_sas: Use DEFINE_SHOW_STORE_ATTRIBUTE helper for debugfs scsi: qla2xxx: Use DEFINE_SHOW_STORE_ATTRIBUTE helper for debugfs drivers/scsi/hisi_sas/hisi_sas_v3_hw.c | 137 ++----------------------- drivers/scsi/qla2xxx/qla_dfs.c | 113 +------------------- include/linux/seq_file.h | 15 +++ 3 files changed, 26 insertions(+), 239 deletions(-) -- 2.17.1