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Message-ID: <20240313093454.3909afe7@gandalf.local.home>
Date: Wed, 13 Mar 2024 09:34:54 -0400
From: Steven Rostedt <rostedt@...dmis.org>
To: LKML <linux-kernel@...r.kernel.org>, Linux Trace Kernel
<linux-trace-kernel@...r.kernel.org>, netdev <netdev@...r.kernel.org>
Cc: Yisen Zhuang <yisen.zhuang@...wei.com>, Salil Mehta
<salil.mehta@...wei.com>, Jijie Shao <shaojijie@...wei.com>, "David S.
Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, Jakub
Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, Yufeng Mo
<moyufeng@...wei.com>, Huazhong Tan <tanhuazhong@...wei.com>
Subject: [PATCH] net: hns3: tracing: fix hclgevf trace event strings
From: "Steven Rostedt (Google)" <rostedt@...dmis.org>
[
Note, I need to take this patch through my tree, so I'm looking for acks.
This causes the build to fail when I add the __assign_str() check, which
I was about to push to Linus, but it breaks allmodconfig due to this error.
]
The __string() and __assign_str() helper macros of the TRACE_EVENT() macro
are going through some optimizations where only the source string of
__string() will be used and the __assign_str() source will be ignored and
later removed.
To make sure that there's no issues, a new check is added between the
__string() src argument and the __assign_str() src argument that does a
strcmp() to make sure they are the same string.
The hclgevf trace events have:
__assign_str(devname, &hdev->nic.kinfo.netdev->name);
Which triggers the warning:
hclgevf_trace.h:34:39: error: passing argument 1 of ‘strcmp’ from incompatible pointer type [-Werror=incompatible-pointer-types]
34 | __assign_str(devname, &hdev->nic.kinfo.netdev->name);
[..]
arch/x86/include/asm/string_64.h:75:24: note: expected ‘const char *’ but argument is of type ‘char (*)[16]’
75 | int strcmp(const char *cs, const char *ct);
| ~~~~~~~~~~~~^~
Because __assign_str() now has:
WARN_ON_ONCE(__builtin_constant_p(src) ? \
strcmp((src), __data_offsets.dst##_ptr_) : \
(src) != __data_offsets.dst##_ptr_); \
The problem is the '&' on hdev->nic.kinfo.netdev->name. That's because
that name is:
char name[IFNAMSIZ]
Where passing an address '&' of a char array is not compatible with strcmp().
The '&' is not necessary, remove it.
Fixes: d8355240cf8fb ("net: hns3: add trace event support for PF/VF mailbox")
Signed-off-by: Steven Rostedt (Google) <rostedt@...dmis.org>
---
drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_trace.h | 8 ++++----
.../net/ethernet/hisilicon/hns3/hns3vf/hclgevf_trace.h | 8 ++++----
2 files changed, 8 insertions(+), 8 deletions(-)
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_trace.h b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_trace.h
index 8510b88d4982..f3cd5a376eca 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_trace.h
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_trace.h
@@ -24,7 +24,7 @@ TRACE_EVENT(hclge_pf_mbx_get,
__field(u8, code)
__field(u8, subcode)
__string(pciname, pci_name(hdev->pdev))
- __string(devname, &hdev->vport[0].nic.kinfo.netdev->name)
+ __string(devname, hdev->vport[0].nic.kinfo.netdev->name)
__array(u32, mbx_data, PF_GET_MBX_LEN)
),
@@ -33,7 +33,7 @@ TRACE_EVENT(hclge_pf_mbx_get,
__entry->code = req->msg.code;
__entry->subcode = req->msg.subcode;
__assign_str(pciname, pci_name(hdev->pdev));
- __assign_str(devname, &hdev->vport[0].nic.kinfo.netdev->name);
+ __assign_str(devname, hdev->vport[0].nic.kinfo.netdev->name);
memcpy(__entry->mbx_data, req,
sizeof(struct hclge_mbx_vf_to_pf_cmd));
),
@@ -56,7 +56,7 @@ TRACE_EVENT(hclge_pf_mbx_send,
__field(u8, vfid)
__field(u16, code)
__string(pciname, pci_name(hdev->pdev))
- __string(devname, &hdev->vport[0].nic.kinfo.netdev->name)
+ __string(devname, hdev->vport[0].nic.kinfo.netdev->name)
__array(u32, mbx_data, PF_SEND_MBX_LEN)
),
@@ -64,7 +64,7 @@ TRACE_EVENT(hclge_pf_mbx_send,
__entry->vfid = req->dest_vfid;
__entry->code = le16_to_cpu(req->msg.code);
__assign_str(pciname, pci_name(hdev->pdev));
- __assign_str(devname, &hdev->vport[0].nic.kinfo.netdev->name);
+ __assign_str(devname, hdev->vport[0].nic.kinfo.netdev->name);
memcpy(__entry->mbx_data, req,
sizeof(struct hclge_mbx_pf_to_vf_cmd));
),
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_trace.h b/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_trace.h
index 5d4895bb57a1..b259e95dd53c 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_trace.h
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_trace.h
@@ -23,7 +23,7 @@ TRACE_EVENT(hclge_vf_mbx_get,
__field(u8, vfid)
__field(u16, code)
__string(pciname, pci_name(hdev->pdev))
- __string(devname, &hdev->nic.kinfo.netdev->name)
+ __string(devname, hdev->nic.kinfo.netdev->name)
__array(u32, mbx_data, VF_GET_MBX_LEN)
),
@@ -31,7 +31,7 @@ TRACE_EVENT(hclge_vf_mbx_get,
__entry->vfid = req->dest_vfid;
__entry->code = le16_to_cpu(req->msg.code);
__assign_str(pciname, pci_name(hdev->pdev));
- __assign_str(devname, &hdev->nic.kinfo.netdev->name);
+ __assign_str(devname, hdev->nic.kinfo.netdev->name);
memcpy(__entry->mbx_data, req,
sizeof(struct hclge_mbx_pf_to_vf_cmd));
),
@@ -55,7 +55,7 @@ TRACE_EVENT(hclge_vf_mbx_send,
__field(u8, code)
__field(u8, subcode)
__string(pciname, pci_name(hdev->pdev))
- __string(devname, &hdev->nic.kinfo.netdev->name)
+ __string(devname, hdev->nic.kinfo.netdev->name)
__array(u32, mbx_data, VF_SEND_MBX_LEN)
),
@@ -64,7 +64,7 @@ TRACE_EVENT(hclge_vf_mbx_send,
__entry->code = req->msg.code;
__entry->subcode = req->msg.subcode;
__assign_str(pciname, pci_name(hdev->pdev));
- __assign_str(devname, &hdev->nic.kinfo.netdev->name);
+ __assign_str(devname, hdev->nic.kinfo.netdev->name);
memcpy(__entry->mbx_data, req,
sizeof(struct hclge_mbx_vf_to_pf_cmd));
),
--
2.43.0
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