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Message-ID: <202503150545.aH9KdkEE-lkp@intel.com>
Date: Sat, 15 Mar 2025 03:05:03 +0800
From: kernel test robot <lkp@...el.com>
To: Arnd Bergmann <arnd@...db.de>
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
linux-kernel@...r.kernel.org, Hans de Goede <hdegoede@...hat.com>
Subject: include/uapi/linux/vbox_vmmdev_types.h:239:4: warning: field u
within 'struct vmmdev_hgcm_function_parameter32' is less aligned than 'union
(unnamed union at include/uapi/linux/vbox_vmmdev_types.h:223:2)' and is
usually due to 'struct vmmdev_hgcm_function...
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 695caca9345a160ecd9645abab8e70cfe849e9ff
commit: c99e1e1d0850ff157f1bc16871acd2dff5a9bcc3 vbox: add HAS_IOPORT dependency
date: 3 weeks ago
config: arm-randconfig-002-20250315 (https://download.01.org/0day-ci/archive/20250315/202503150545.aH9KdkEE-lkp@intel.com/config)
compiler: clang version 21.0.0git (https://github.com/llvm/llvm-project 87916f8c32ebd8e284091db9b70339df57fd1e90)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250315/202503150545.aH9KdkEE-lkp@intel.com/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202503150545.aH9KdkEE-lkp@intel.com/
All warnings (new ones prefixed by >>):
In file included from drivers/virt/vboxguest/vboxguest_utils.c:19:
In file included from include/linux/vbox_utils.h:8:
>> include/uapi/linux/vbox_vmmdev_types.h:239:4: warning: field u within 'struct vmmdev_hgcm_function_parameter32' is less aligned than 'union (unnamed union at include/uapi/linux/vbox_vmmdev_types.h:223:2)' and is usually due to 'struct vmmdev_hgcm_function_parameter32' being packed, which can lead to unaligned accesses [-Wunaligned-access]
239 | } u;
| ^
>> include/uapi/linux/vbox_vmmdev_types.h:254:6: warning: field u within 'struct vmmdev_hgcm_function_parameter64::(unnamed at include/uapi/linux/vbox_vmmdev_types.h:249:3)' is less aligned than 'union (unnamed union at include/uapi/linux/vbox_vmmdev_types.h:251:4)' and is usually due to 'struct vmmdev_hgcm_function_parameter64::(unnamed at include/uapi/linux/vbox_vmmdev_types.h:249:3)' being packed, which can lead to unaligned accesses [-Wunaligned-access]
254 | } u;
| ^
2 warnings generated.
vim +239 include/uapi/linux/vbox_vmmdev_types.h
f6ddd094f579344 Hans de Goede 2017-11-30 219
f6ddd094f579344 Hans de Goede 2017-11-30 220 /** HGCM function parameter, 32-bit client. */
f6ddd094f579344 Hans de Goede 2017-11-30 221 struct vmmdev_hgcm_function_parameter32 {
f6ddd094f579344 Hans de Goede 2017-11-30 222 enum vmmdev_hgcm_function_parameter_type type;
f6ddd094f579344 Hans de Goede 2017-11-30 223 union {
f6ddd094f579344 Hans de Goede 2017-11-30 224 __u32 value32;
f6ddd094f579344 Hans de Goede 2017-11-30 225 __u64 value64;
f6ddd094f579344 Hans de Goede 2017-11-30 226 struct {
f6ddd094f579344 Hans de Goede 2017-11-30 227 __u32 size;
f6ddd094f579344 Hans de Goede 2017-11-30 228 union {
f6ddd094f579344 Hans de Goede 2017-11-30 229 __u32 phys_addr;
f6ddd094f579344 Hans de Goede 2017-11-30 230 __u32 linear_addr;
f6ddd094f579344 Hans de Goede 2017-11-30 231 } u;
f6ddd094f579344 Hans de Goede 2017-11-30 232 } pointer;
f6ddd094f579344 Hans de Goede 2017-11-30 233 struct {
f6ddd094f579344 Hans de Goede 2017-11-30 234 /** Size of the buffer described by the page list. */
f6ddd094f579344 Hans de Goede 2017-11-30 235 __u32 size;
f6ddd094f579344 Hans de Goede 2017-11-30 236 /** Relative to the request header. */
f6ddd094f579344 Hans de Goede 2017-11-30 237 __u32 offset;
f6ddd094f579344 Hans de Goede 2017-11-30 238 } page_list;
f6ddd094f579344 Hans de Goede 2017-11-30 @239 } u;
f6ddd094f579344 Hans de Goede 2017-11-30 240 } __packed;
f6ddd094f579344 Hans de Goede 2017-11-30 241 VMMDEV_ASSERT_SIZE(vmmdev_hgcm_function_parameter32, 4 + 8);
f6ddd094f579344 Hans de Goede 2017-11-30 242
f6ddd094f579344 Hans de Goede 2017-11-30 243 /** HGCM function parameter, 64-bit client. */
f6ddd094f579344 Hans de Goede 2017-11-30 244 struct vmmdev_hgcm_function_parameter64 {
f6ddd094f579344 Hans de Goede 2017-11-30 245 enum vmmdev_hgcm_function_parameter_type type;
f6ddd094f579344 Hans de Goede 2017-11-30 246 union {
f6ddd094f579344 Hans de Goede 2017-11-30 247 __u32 value32;
f6ddd094f579344 Hans de Goede 2017-11-30 248 __u64 value64;
f6ddd094f579344 Hans de Goede 2017-11-30 249 struct {
f6ddd094f579344 Hans de Goede 2017-11-30 250 __u32 size;
f6ddd094f579344 Hans de Goede 2017-11-30 251 union {
f6ddd094f579344 Hans de Goede 2017-11-30 252 __u64 phys_addr;
f6ddd094f579344 Hans de Goede 2017-11-30 253 __u64 linear_addr;
f6ddd094f579344 Hans de Goede 2017-11-30 @254 } u;
f6ddd094f579344 Hans de Goede 2017-11-30 255 } __packed pointer;
f6ddd094f579344 Hans de Goede 2017-11-30 256 struct {
f6ddd094f579344 Hans de Goede 2017-11-30 257 /** Size of the buffer described by the page list. */
f6ddd094f579344 Hans de Goede 2017-11-30 258 __u32 size;
f6ddd094f579344 Hans de Goede 2017-11-30 259 /** Relative to the request header. */
f6ddd094f579344 Hans de Goede 2017-11-30 260 __u32 offset;
f6ddd094f579344 Hans de Goede 2017-11-30 261 } page_list;
f6ddd094f579344 Hans de Goede 2017-11-30 262 } __packed u;
f6ddd094f579344 Hans de Goede 2017-11-30 263 } __packed;
f6ddd094f579344 Hans de Goede 2017-11-30 264 VMMDEV_ASSERT_SIZE(vmmdev_hgcm_function_parameter64, 4 + 12);
f6ddd094f579344 Hans de Goede 2017-11-30 265
:::::: The code at line 239 was first introduced by commit
:::::: f6ddd094f5793447d594aa9f42032a7aba12b4d2 virt: Add vboxguest driver for Virtual Box Guest integration UAPI
:::::: TO: Hans de Goede <hdegoede@...hat.com>
:::::: CC: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
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