-Wflex-array-member-not-at-end is coming in GCC-14, and we are getting
ready to enable it globally.
Use the `__struct_group()` helper to separate the flexible array
from the rest of the members in flexible `struct qat_alg_buf_list`,
through tagged `struct qat_alg_buf_list_hdr`, and avoid embedding the
flexible-array member in the middle of `struct qat_alg_fixed_buf_list`.
Also, use `container_of()` whenever we need to retrieve a pointer to
the flexible structure.
So, with these changes, fix the following warnings:
drivers/crypto/intel/qat/qat_common/qat_bl.h:25:33: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]
drivers/crypto/intel/qat/qat_common/qat_bl.h:25:33: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]
drivers/crypto/intel/qat/qat_common/qat_bl.h:25:33: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]
drivers/crypto/intel/qat/qat_common/qat_bl.h:25:33: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]
drivers/crypto/intel/qat/qat_common/qat_bl.h:25:33: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]
drivers/crypto/intel/qat/qat_common/qat_bl.h:25:33: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]
drivers/crypto/intel/qat/qat_common/qat_bl.h:25:33: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]
drivers/crypto/intel/qat/qat_common/qat_bl.h:25:33: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]
Link: https://github.com/KSPP/linux/issues/202
Signed-off-by: Gustavo A. R. Silva <[email protected]>
---
drivers/crypto/intel/qat/qat_common/qat_bl.c | 6 ++++--
drivers/crypto/intel/qat/qat_common/qat_bl.h | 11 +++++++----
2 files changed, 11 insertions(+), 6 deletions(-)
diff --git a/drivers/crypto/intel/qat/qat_common/qat_bl.c b/drivers/crypto/intel/qat/qat_common/qat_bl.c
index 76baed0a76c0..338acf29c487 100644
--- a/drivers/crypto/intel/qat/qat_common/qat_bl.c
+++ b/drivers/crypto/intel/qat/qat_common/qat_bl.c
@@ -81,7 +81,8 @@ static int __qat_bl_sgl_to_bufl(struct adf_accel_dev *accel_dev,
if (unlikely(!bufl))
return -ENOMEM;
} else {
- bufl = &buf->sgl_src.sgl_hdr;
+ bufl = container_of(&buf->sgl_src.sgl_hdr,
+ struct qat_alg_buf_list, hdr);
memset(bufl, 0, sizeof(struct qat_alg_buf_list));
buf->sgl_src_valid = true;
}
@@ -139,7 +140,8 @@ static int __qat_bl_sgl_to_bufl(struct adf_accel_dev *accel_dev,
if (unlikely(!buflout))
goto err_in;
} else {
- buflout = &buf->sgl_dst.sgl_hdr;
+ buflout = container_of(&buf->sgl_dst.sgl_hdr,
+ struct qat_alg_buf_list, hdr);
memset(buflout, 0, sizeof(struct qat_alg_buf_list));
buf->sgl_dst_valid = true;
}
diff --git a/drivers/crypto/intel/qat/qat_common/qat_bl.h b/drivers/crypto/intel/qat/qat_common/qat_bl.h
index d87e4f35ac39..85bc32a9ec0e 100644
--- a/drivers/crypto/intel/qat/qat_common/qat_bl.h
+++ b/drivers/crypto/intel/qat/qat_common/qat_bl.h
@@ -15,14 +15,17 @@ struct qat_alg_buf {
} __packed;
struct qat_alg_buf_list {
- u64 resrvd;
- u32 num_bufs;
- u32 num_mapped_bufs;
+ /* New members must be added within the __struct_group() macro below. */
+ __struct_group(qat_alg_buf_list_hdr, hdr, __packed,
+ u64 resrvd;
+ u32 num_bufs;
+ u32 num_mapped_bufs;
+ );
struct qat_alg_buf buffers[];
} __packed;
struct qat_alg_fixed_buf_list {
- struct qat_alg_buf_list sgl_hdr;
+ struct qat_alg_buf_list_hdr sgl_hdr;
struct qat_alg_buf descriptors[QAT_MAX_BUFF_DESC];
} __packed __aligned(64);
--
2.34.1
On Mon, Mar 25, 2024 at 02:44:55PM -0600, Gustavo A. R. Silva wrote:
> -Wflex-array-member-not-at-end is coming in GCC-14, and we are getting
> ready to enable it globally.
>
> Use the `__struct_group()` helper to separate the flexible array
> from the rest of the members in flexible `struct qat_alg_buf_list`,
> through tagged `struct qat_alg_buf_list_hdr`, and avoid embedding the
> flexible-array member in the middle of `struct qat_alg_fixed_buf_list`.
>
> Also, use `container_of()` whenever we need to retrieve a pointer to
> the flexible structure.
>
> So, with these changes, fix the following warnings:
> drivers/crypto/intel/qat/qat_common/qat_bl.h:25:33: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]
> drivers/crypto/intel/qat/qat_common/qat_bl.h:25:33: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]
> drivers/crypto/intel/qat/qat_common/qat_bl.h:25:33: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]
> drivers/crypto/intel/qat/qat_common/qat_bl.h:25:33: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]
> drivers/crypto/intel/qat/qat_common/qat_bl.h:25:33: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]
> drivers/crypto/intel/qat/qat_common/qat_bl.h:25:33: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]
> drivers/crypto/intel/qat/qat_common/qat_bl.h:25:33: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]
> drivers/crypto/intel/qat/qat_common/qat_bl.h:25:33: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]
>
> Link: https://github.com/KSPP/linux/issues/202
> Signed-off-by: Gustavo A. R. Silva <[email protected]>
Acked-by: Giovanni Cabiddu <[email protected]>
Regards,
--
Giovanni