On Sat, 2021-10-09 at 21:08 +0800, Tianjia Zhang wrote: [...] > diff --git a/include/uapi/linux/hash_info.h > b/include/uapi/linux/hash_info.h > index 74a8609fcb4d..1355525dd4aa 100644 > --- a/include/uapi/linux/hash_info.h > +++ b/include/uapi/linux/hash_info.h > @@ -32,7 +32,7 @@ enum hash_algo { > HASH_ALGO_TGR_128, > HASH_ALGO_TGR_160, > HASH_ALGO_TGR_192, > - HASH_ALGO_SM3_256, > + HASH_ALGO_SM3, > HASH_ALGO_STREEBOG_256, > HASH_ALGO_STREEBOG_512, > HASH_ALGO__LAST This is another one you can't do: all headers in UAPI are exports to userspace and the definitions constitute an ABI. If you simply do a rename, every userspace program that uses the current definition will immediately break on compile. You could add HASH_ALGO_SM3, but you can't remove HASH_ALGO_SM3_256 James