Our customer reported the below warning whe using Clang v16.0.4 and C++20,
on a code that includes the header "/usr/include/infiniband/verbs.h":
error: bitwise operation between different enumeration types ('ibv_access_flags' and
'ib_uverbs_access_flags') is deprecated [-Werror,-Wdeprecated-enum-enum-conversion]
mem->mr = ibv_reg_mr(dev->pd, (void*)start, len, IBV_ACCESS_LOCAL_WRITE);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/infiniband/verbs.h:2514:19: note: expanded from macro 'ibv_reg_mr'
((access) & IBV_ACCESS_OPTIONAL_RANGE) == 0))
~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~~~~~~~~~
1 error generated.
According to the article "Clang 11 warning: Bitwise operation between different
enumeration types is deprecated":
C++20's P1120R0 deprecated bitwise operations between different enums. Such code is
likely to become ill-formed in C++23. Clang 11 warns about such cases. It should be fixed.
Reported-by: Rogerio Moraes <rogerio@xxxxxxxxxxx>
Signed-off-by: Daniel Vacek <neelx@xxxxxxxxxx>
---
libibverbs/verbs.h | 4 +++-
libibverbs/verbs_api.h | 1 -
2 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/libibverbs/verbs.h b/libibverbs/verbs.h
index 03a7a2a7..85995abe 100644
--- a/libibverbs/verbs.h
+++ b/libibverbs/verbs.h
@@ -617,7 +617,9 @@ enum ibv_access_flags {
IBV_ACCESS_HUGETLB = (1<<7),
IBV_ACCESS_FLUSH_GLOBAL = (1 << 8),
IBV_ACCESS_FLUSH_PERSISTENT = (1 << 9),
- IBV_ACCESS_RELAXED_ORDERING = IBV_ACCESS_OPTIONAL_FIRST,
+
+ IBV_ACCESS_RELAXED_ORDERING = IBV_ACCESS_OPTIONAL_FIRST, // bit 20
+ IBV_ACCESS_OPTIONAL_RANGE = IB_UVERBS_ACCESS_OPTIONAL_RANGE // mask of bits 20-29
};
struct ibv_mw_bind_info {
diff --git a/libibverbs/verbs_api.h b/libibverbs/verbs_api.h
index 309f6fba..7a5f0cdf 100644
--- a/libibverbs/verbs_api.h
+++ b/libibverbs/verbs_api.h
@@ -94,7 +94,6 @@
#define IBV_QPF_GRH_REQUIRED IB_UVERBS_QPF_GRH_REQUIRED
-#define IBV_ACCESS_OPTIONAL_RANGE IB_UVERBS_ACCESS_OPTIONAL_RANGE
#define IBV_ACCESS_OPTIONAL_FIRST IB_UVERBS_ACCESS_OPTIONAL_FIRST
#endif
--
2.40.1
