Re: [PATCH] IB/core: Use sizeof_field() helper

From: Jason Gunthorpe
Date: Wed May 27 2020 - 12:45:01 EST


On Wed, May 27, 2020 at 09:41:52AM -0500, Gustavo A. R. Silva wrote:
> Make use of the sizeof_field() helper instead of an open-coded version.
>
> Signed-off-by: Gustavo A. R. Silva <gustavoars@xxxxxxxxxx>
> ---
> drivers/infiniband/core/sa_query.c | 8 ++++----
> drivers/infiniband/core/uverbs_cmd.c | 2 +-
> drivers/infiniband/core/uverbs_ioctl.c | 2 +-
> 3 files changed, 6 insertions(+), 6 deletions(-)

What kind of tool are you using for this? It seems to miss a lot, I
added in a few others to this patch and applied it, thanks:

diff --git a/drivers/infiniband/core/sa_query.c b/drivers/infiniband/core/sa_query.c
index 8f70c5c38ab7c3..a2ed09a3c714a9 100644
--- a/drivers/infiniband/core/sa_query.c
+++ b/drivers/infiniband/core/sa_query.c
@@ -420,7 +420,7 @@ static const struct ib_field opa_path_rec_table[] = {

#define MCMEMBER_REC_FIELD(field) \
.struct_offset_bytes = offsetof(struct ib_sa_mcmember_rec, field), \
- .struct_size_bytes = sizeof ((struct ib_sa_mcmember_rec *) 0)->field, \
+ .struct_size_bytes = sizeof_field(struct ib_sa_mcmember_rec, field), \
.field_name = "sa_mcmember_rec:" #field

static const struct ib_field mcmember_rec_table[] = {
@@ -504,7 +504,7 @@ static const struct ib_field mcmember_rec_table[] = {

#define SERVICE_REC_FIELD(field) \
.struct_offset_bytes = offsetof(struct ib_sa_service_rec, field), \
- .struct_size_bytes = sizeof ((struct ib_sa_service_rec *) 0)->field, \
+ .struct_size_bytes = sizeof_field(struct ib_sa_service_rec, field), \
.field_name = "sa_service_rec:" #field

static const struct ib_field service_rec_table[] = {
@@ -710,7 +710,7 @@ static const struct ib_field opa_classport_info_rec_table[] = {

#define GUIDINFO_REC_FIELD(field) \
.struct_offset_bytes = offsetof(struct ib_sa_guidinfo_rec, field), \
- .struct_size_bytes = sizeof((struct ib_sa_guidinfo_rec *) 0)->field, \
+ .struct_size_bytes = sizeof_field(struct ib_sa_guidinfo_rec, field), \
.field_name = "sa_guidinfo_rec:" #field

static const struct ib_field guidinfo_rec_table[] = {
diff --git a/drivers/infiniband/core/ud_header.c b/drivers/infiniband/core/ud_header.c
index 29a45d2f8898e1..d65d541b9a2587 100644
--- a/drivers/infiniband/core/ud_header.c
+++ b/drivers/infiniband/core/ud_header.c
@@ -41,7 +41,7 @@

#define STRUCT_FIELD(header, field) \
.struct_offset_bytes = offsetof(struct ib_unpacked_ ## header, field), \
- .struct_size_bytes = sizeof ((struct ib_unpacked_ ## header *) 0)->field, \
+ .struct_size_bytes = sizeof_field(struct ib_unpacked_ ## header, field), \
.field_name = #header ":" #field

static const struct ib_field lrh_table[] = {
diff --git a/include/rdma/uverbs_ioctl.h b/include/rdma/uverbs_ioctl.h
index 5bd2b037e9147c..0418d7bddf3e0c 100644
--- a/include/rdma/uverbs_ioctl.h
+++ b/include/rdma/uverbs_ioctl.h
@@ -420,9 +420,9 @@ struct uapi_definition {
.scope = UAPI_SCOPE_OBJECT, \
.needs_fn_offset = \
offsetof(struct ib_device_ops, ibdev_fn) + \
- BUILD_BUG_ON_ZERO( \
- sizeof(((struct ib_device_ops *)0)->ibdev_fn) != \
- sizeof(void *)), \
+ BUILD_BUG_ON_ZERO(sizeof_field(struct ib_device_ops, \
+ ibdev_fn) != \
+ sizeof(void *)), \
}

/*
@@ -435,9 +435,9 @@ struct uapi_definition {
.scope = UAPI_SCOPE_METHOD, \
.needs_fn_offset = \
offsetof(struct ib_device_ops, ibdev_fn) + \
- BUILD_BUG_ON_ZERO( \
- sizeof(((struct ib_device_ops *)0)->ibdev_fn) != \
- sizeof(void *)), \
+ BUILD_BUG_ON_ZERO(sizeof_field(struct ib_device_ops, \
+ ibdev_fn) != \
+ sizeof(void *)), \
}

/* Call a function to determine if the entire object is supported or not */