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

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Message-Id: <1713340848-6901-1-git-send-email-ssengar@linux.microsoft.com>
Date: Wed, 17 Apr 2024 01:00:48 -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
Subject: [PATCH] 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.

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

diff --git a/tools/hv/Makefile b/tools/hv/Makefile
index bb52871da341..2e60e2c212cd 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)
-- 
2.34.1