diff options
| author | Ira Weiny <ira.weiny@intel.com> | 2023-02-02 17:04:25 -0800 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2023-02-10 17:54:45 -0800 |
| commit | 11ef026e467b05eac0a2ceb981d351ddc4b12216 (patch) | |
| tree | c4663624f91f9f68d08487ad77f451517eab1d1e /include/uapi/linux/cxl_mem.h | |
| parent | 860334e59003f684d85c519179038bd655eeb9ef (diff) | |
| download | linux-stable-11ef026e467b05eac0a2ceb981d351ddc4b12216.tar.gz linux-stable-11ef026e467b05eac0a2ceb981d351ddc4b12216.tar.bz2 linux-stable-11ef026e467b05eac0a2ceb981d351ddc4b12216.zip | |
cxl/uapi: Add warning on CXL command enum
The CXL command enum is exported to user space and must maintain
backwards compatibility.
Add comment that new defines must be added to the end of the list.
Suggested-by: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Link: https://lore.kernel.org/r/20221222-cxl-misc-v4-2-62f701c1cdd1@intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'include/uapi/linux/cxl_mem.h')
| -rw-r--r-- | include/uapi/linux/cxl_mem.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/uapi/linux/cxl_mem.h b/include/uapi/linux/cxl_mem.h index c71021a2a9ed..459a3f7f764b 100644 --- a/include/uapi/linux/cxl_mem.h +++ b/include/uapi/linux/cxl_mem.h @@ -19,6 +19,10 @@ #define CXL_MEM_QUERY_COMMANDS _IOR(0xCE, 1, struct cxl_mem_query_commands) #define CXL_MEM_SEND_COMMAND _IOWR(0xCE, 2, struct cxl_send_command) +/* + * NOTE: New defines must be added to the end of the list to preserve + * compatibility because this enum is exported to user space. + */ #define CXL_CMDS \ ___C(INVALID, "Invalid Command"), \ ___C(IDENTIFY, "Identify Command"), \ |