linux-kernel - [PATCH v2] tools: hv: suppress the invalid warning for packed member alignment

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Date: Sun,  5 May 2024 22:38:58 -0700
From: Saurabh Sengar <ssengar@...ux.microsoft.com>
To: kys@...rosoft.com,
	haiyangz@...rosoft.com,
	wei.liu@...nel.org,
	decui@...rosoft.com,
	gregkh@...uxfoundation.org,
	linux-kernel@...r.kernel.org,
	linux-hyperv@...r.kernel.org
Cc: ssengar@...rosoft.com,
	maryhardy@...rosoft.com,
	longli@...rosoft.com
Subject: [PATCH v2] tools: hv: suppress the invalid warning for packed member alignment

Packed struct vmbus_bufring is 4096 byte aligned and the reporting
warning is for the first member of that struct which shouldn't add
any offset to create alignment issue.

Suppress the warning by adding -Wno-address-of-packed-member flag to
gcc.

Fixes: 45bab4d74651 ("tools: hv: Add vmbus_bufring")
Reported-by: kernel test robot <yujie.liu@...el.com>
Closes: https://lore.kernel.org/all/202404121913.GhtSoKbW-lkp@intel.com/
Signed-off-by: Saurabh Sengar <ssengar@...ux.microsoft.com>
---
[V2] Added 'Fixes' tag

 tools/hv/Makefile | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/hv/Makefile b/tools/hv/Makefile
index bb52871..2e60e2c 100644
--- a/tools/hv/Makefile
+++ b/tools/hv/Makefile
@@ -17,6 +17,7 @@ endif
 MAKEFLAGS += -r
 
 override CFLAGS += -O2 -Wall -g -D_GNU_SOURCE -I$(OUTPUT)include
+override CFLAGS += -Wno-address-of-packed-member
 
 ALL_TARGETS := hv_kvp_daemon hv_vss_daemon
 ifneq ($(ARCH), aarch64)
-- 
1.8.3.1