drivers/soc/qcom/llcc-qcom.c:88:8: warning: Excessive padding in 'struct llcc_slice_config' (6 padding bytes, where 2 is optimal). Optimal fields order: usecase_id, slice_id, max_cap, priority, bonus_ways, res_ways, cache_mode, probe_target_ways, fixed_si...

From: kernel test robot
Date: Mon Jul 11 2022 - 06:52:48 EST

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tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 32346491ddf24599decca06190ebca03ff9de7f8
commit: 2b8175a1f108361c2c1a11b27415631994efbfce soc: qcom: llcc: Add write-cache cacheable support
date: 5 months ago
config: riscv-randconfig-c006-20220707 (https://download.01.org/0day-ci/archive/20220711/202207111703.pE1rkAYv-lkp@xxxxxxxxx/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 77a38f6839980bfac61babb40d83772c51427011)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# install riscv cross compiling tool for clang build
# apt-get install binutils-riscv-linux-gnu
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=2b8175a1f108361c2c1a11b27415631994efbfce
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 2b8175a1f108361c2c1a11b27415631994efbfce
# save the config file
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=riscv clang-analyzer

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@xxxxxxxxx>

clang-analyzer warnings: (new ones prefixed by >>)
^~~~
Suppressed 7 warnings (7 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
8 warnings generated.
drivers/gpio/gpio-virtio.c:24:8: warning: Excessive padding in 'struct virtio_gpio_line' (158 padding bytes, where 30 is optimal). Optimal fields order: res, rxlen, completion, req, lock, consider reordering the fields or adding explicit padding members [clang-analyzer-optin.performance.Padding]
struct virtio_gpio_line {
~~~~~~~^~~~~~~~~~~~~~~~~~
drivers/gpio/gpio-virtio.c:24:8: note: Excessive padding in 'struct virtio_gpio_line' (158 padding bytes, where 30 is optimal). Optimal fields order: res, rxlen, completion, req, lock, consider reordering the fields or adding explicit padding members
struct virtio_gpio_line {
~~~~~~~^~~~~~~~~~~~~~~~~~
drivers/gpio/gpio-virtio.c:32:8: warning: Excessive padding in 'struct vgpio_irq_line' (183 padding bytes, where 119 is optimal). Optimal fields order: ires, type, disabled, masked, queued, update_pending, queue_pending, ireq, consider reordering the fields or adding explicit padding members [clang-analyzer-optin.performance.Padding]
struct vgpio_irq_line {
~~~~~~~^~~~~~~~~~~~~~~~
drivers/gpio/gpio-virtio.c:32:8: note: Excessive padding in 'struct vgpio_irq_line' (183 padding bytes, where 119 is optimal). Optimal fields order: ires, type, disabled, masked, queued, update_pending, queue_pending, ireq, consider reordering the fields or adding explicit padding members
struct vgpio_irq_line {
~~~~~~~^~~~~~~~~~~~~~~~
Suppressed 6 warnings (6 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
6 warnings generated.
Suppressed 6 warnings (6 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
6 warnings generated.
Suppressed 6 warnings (6 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
6 warnings generated.
Suppressed 6 warnings (6 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
6 warnings generated.
Suppressed 6 warnings (6 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
6 warnings generated.
Suppressed 6 warnings (6 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
6 warnings generated.
Suppressed 6 warnings (6 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
7 warnings generated.
Suppressed 7 warnings (7 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
6 warnings generated.
Suppressed 6 warnings (6 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
6 warnings generated.
Suppressed 6 warnings (6 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
6 warnings generated.
Suppressed 6 warnings (6 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
12 warnings generated.
drivers/bus/mhi/core/pm.c:320:17: warning: Value stored to 'dev' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
struct device *dev = &mhi_cntrl->mhi_dev->dev;
^~~ ~~~~~~~~~~~~~~~~~~~~~~~~
drivers/bus/mhi/core/pm.c:320:17: note: Value stored to 'dev' during its initialization is never read
struct device *dev = &mhi_cntrl->mhi_dev->dev;
^~~ ~~~~~~~~~~~~~~~~~~~~~~~~
drivers/bus/mhi/core/pm.c:377:17: warning: Value stored to 'dev' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
struct device *dev = &mhi_cntrl->mhi_dev->dev;
^~~ ~~~~~~~~~~~~~~~~~~~~~~~~
drivers/bus/mhi/core/pm.c:377:17: note: Value stored to 'dev' during its initialization is never read
struct device *dev = &mhi_cntrl->mhi_dev->dev;
^~~ ~~~~~~~~~~~~~~~~~~~~~~~~
drivers/bus/mhi/core/pm.c:720:17: warning: Value stored to 'dev' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
struct device *dev = &mhi_cntrl->mhi_dev->dev;
^~~ ~~~~~~~~~~~~~~~~~~~~~~~~
drivers/bus/mhi/core/pm.c:720:17: note: Value stored to 'dev' during its initialization is never read
struct device *dev = &mhi_cntrl->mhi_dev->dev;
^~~ ~~~~~~~~~~~~~~~~~~~~~~~~
drivers/bus/mhi/core/pm.c:739:17: warning: Value stored to 'dev' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
struct device *dev = &mhi_cntrl->mhi_dev->dev;
^~~ ~~~~~~~~~~~~~~~~~~~~~~~~
drivers/bus/mhi/core/pm.c:739:17: note: Value stored to 'dev' during its initialization is never read
struct device *dev = &mhi_cntrl->mhi_dev->dev;
^~~ ~~~~~~~~~~~~~~~~~~~~~~~~
drivers/bus/mhi/core/pm.c:1201:17: warning: Value stored to 'dev' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
struct device *dev = &mhi_cntrl->mhi_dev->dev;
^~~ ~~~~~~~~~~~~~~~~~~~~~~~~
drivers/bus/mhi/core/pm.c:1201:17: note: Value stored to 'dev' during its initialization is never read
struct device *dev = &mhi_cntrl->mhi_dev->dev;
^~~ ~~~~~~~~~~~~~~~~~~~~~~~~
Suppressed 7 warnings (7 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
7 warnings generated.
drivers/usb/cdns3/cdns3-ti.c:160:2: warning: Value stored to 'reg' is never read [clang-analyzer-deadcode.DeadStores]
reg = cdns_ti_readl(data, USBSS_STATIC_CONFIG);
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/usb/cdns3/cdns3-ti.c:160:2: note: Value stored to 'reg' is never read
reg = cdns_ti_readl(data, USBSS_STATIC_CONFIG);
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Suppressed 6 warnings (6 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
6 warnings generated.
Suppressed 6 warnings (6 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
6 warnings generated.
Suppressed 6 warnings (6 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
10 warnings generated.
Suppressed 10 warnings (10 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
6 warnings generated.
>> drivers/soc/qcom/llcc-qcom.c:88:8: warning: Excessive padding in 'struct llcc_slice_config' (6 padding bytes, where 2 is optimal). Optimal fields order: usecase_id, slice_id, max_cap, priority, bonus_ways, res_ways, cache_mode, probe_target_ways, fixed_size, dis_cap_alloc, retain_on_pc, activate_on_init, write_scid_en, write_scid_cacheable_en, consider reordering the fields or adding explicit padding members [clang-analyzer-optin.performance.Padding]
struct llcc_slice_config {
~~~~~~~^~~~~~~~~~~~~~~~~~~
drivers/soc/qcom/llcc-qcom.c:88:8: note: Excessive padding in 'struct llcc_slice_config' (6 padding bytes, where 2 is optimal). Optimal fields order: usecase_id, slice_id, max_cap, priority, bonus_ways, res_ways, cache_mode, probe_target_ways, fixed_size, dis_cap_alloc, retain_on_pc, activate_on_init, write_scid_en, write_scid_cacheable_en, consider reordering the fields or adding explicit padding members
struct llcc_slice_config {
~~~~~~~^~~~~~~~~~~~~~~~~~~
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
5 warnings generated.
Suppressed 5 warnings (5 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
2 warnings generated.
Suppressed 2 warnings (2 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
2 warnings generated.
Suppressed 2 warnings (2 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
6 warnings generated.
Suppressed 6 warnings (6 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
6 warnings generated.
Suppressed 6 warnings (6 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
10 warnings generated.
drivers/firewire/core-cdev.c:611:2: warning: 7th function call argument is an uninitialized value [clang-analyzer-core.CallAndMessage]
fw_send_request(client->device->card, &e->r.transaction,
^
drivers/firewire/core-cdev.c:1481:6: note: Assuming field 'speed' is <= field 'link_speed'
if (a->speed > client->device->card->link_speed ||
^
include/linux/compiler.h:56:47: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^~~~
include/linux/compiler.h:58:52: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^~~~
drivers/firewire/core-cdev.c:1481:6: note: Left side of '||' is false
if (a->speed > client->device->card->link_speed ||
^
drivers/firewire/core-cdev.c:1482:6: note: Assuming the condition is false
a->length > 1024 << a->speed)
^
include/linux/compiler.h:56:47: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^~~~
include/linux/compiler.h:58:52: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^~~~
drivers/firewire/core-cdev.c:1481:2: note: '?' condition is false
if (a->speed > client->device->card->link_speed ||
^
include/linux/compiler.h:56:28: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^
include/linux/compiler.h:58:31: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^
drivers/firewire/core-cdev.c:1481:9: note: Field 'speed' is <= field 'link_speed'
if (a->speed > client->device->card->link_speed ||
^
drivers/firewire/core-cdev.c:1481:6: note: Left side of '||' is false
if (a->speed > client->device->card->link_speed ||
^
drivers/firewire/core-cdev.c:1481:2: note: '?' condition is false
if (a->speed > client->device->card->link_speed ||
^
include/linux/compiler.h:56:28: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^
include/linux/compiler.h:58:69: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^
include/linux/compiler.h:69:2: note: expanded from macro '__trace_if_value'
(cond) ? \
^
drivers/firewire/core-cdev.c:1481:2: note: Taking false branch
if (a->speed > client->device->card->link_speed ||
^
include/linux/compiler.h:56:23: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^
drivers/firewire/core-cdev.c:1485:6: note: Assuming field 'tag' is <= 3
if (a->tag > 3 || a->channel > 63 || a->sy > 15)
^
include/linux/compiler.h:56:47: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
^~~~
include/linux/compiler.h:58:52: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^~~~
drivers/firewire/core-cdev.c:1485:6: note: Left side of '||' is false
if (a->tag > 3 || a->channel > 63 || a->sy > 15)
^
drivers/firewire/core-cdev.c:1485:20: note: Assuming field 'channel' is <= 63
if (a->tag > 3 || a->channel > 63 || a->sy > 15)
^
include/linux/compiler.h:56:47: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )

vim +88 drivers/soc/qcom/llcc-qcom.c

8008e7902f28eb Sai Prakash Ranjan 2022-01-28 60
99356b03b431f9 Vivek Gautam 2019-07-18 61 /**
171c03171a4cdf Lee Jones 2020-11-03 62 * struct llcc_slice_config - Data associated with the llcc slice
99356b03b431f9 Vivek Gautam 2019-07-18 63 * @usecase_id: Unique id for the client's use case
99356b03b431f9 Vivek Gautam 2019-07-18 64 * @slice_id: llcc slice id for each client
99356b03b431f9 Vivek Gautam 2019-07-18 65 * @max_cap: The maximum capacity of the cache slice provided in KB
99356b03b431f9 Vivek Gautam 2019-07-18 66 * @priority: Priority of the client used to select victim line for replacement
99356b03b431f9 Vivek Gautam 2019-07-18 67 * @fixed_size: Boolean indicating if the slice has a fixed capacity
99356b03b431f9 Vivek Gautam 2019-07-18 68 * @bonus_ways: Bonus ways are additional ways to be used for any slice,
99356b03b431f9 Vivek Gautam 2019-07-18 69 * if client ends up using more than reserved cache ways. Bonus
99356b03b431f9 Vivek Gautam 2019-07-18 70 * ways are allocated only if they are not reserved for some
99356b03b431f9 Vivek Gautam 2019-07-18 71 * other client.
99356b03b431f9 Vivek Gautam 2019-07-18 72 * @res_ways: Reserved ways for the cache slice, the reserved ways cannot
99356b03b431f9 Vivek Gautam 2019-07-18 73 * be used by any other client than the one its assigned to.
99356b03b431f9 Vivek Gautam 2019-07-18 74 * @cache_mode: Each slice operates as a cache, this controls the mode of the
99356b03b431f9 Vivek Gautam 2019-07-18 75 * slice: normal or TCM(Tightly Coupled Memory)
99356b03b431f9 Vivek Gautam 2019-07-18 76 * @probe_target_ways: Determines what ways to probe for access hit. When
99356b03b431f9 Vivek Gautam 2019-07-18 77 * configured to 1 only bonus and reserved ways are probed.
99356b03b431f9 Vivek Gautam 2019-07-18 78 * When configured to 0 all ways in llcc are probed.
99356b03b431f9 Vivek Gautam 2019-07-18 79 * @dis_cap_alloc: Disable capacity based allocation for a client
99356b03b431f9 Vivek Gautam 2019-07-18 80 * @retain_on_pc: If this bit is set and client has maintained active vote
99356b03b431f9 Vivek Gautam 2019-07-18 81 * then the ways assigned to this client are not flushed on power
99356b03b431f9 Vivek Gautam 2019-07-18 82 * collapse.
99356b03b431f9 Vivek Gautam 2019-07-18 83 * @activate_on_init: Activate the slice immediately after it is programmed
c4df37fe186de4 Manivannan Sadhasivam 2020-11-30 84 * @write_scid_en: Bit enables write cache support for a given scid.
2b8175a1f10836 Sai Prakash Ranjan 2022-01-28 85 * @write_scid_cacheable_en: Enables write cache cacheable support for a
2b8175a1f10836 Sai Prakash Ranjan 2022-01-28 86 * given scid (not supported on v2 or older hardware).
99356b03b431f9 Vivek Gautam 2019-07-18 87 */
99356b03b431f9 Vivek Gautam 2019-07-18 @88 struct llcc_slice_config {
99356b03b431f9 Vivek Gautam 2019-07-18 89 u32 usecase_id;
99356b03b431f9 Vivek Gautam 2019-07-18 90 u32 slice_id;
99356b03b431f9 Vivek Gautam 2019-07-18 91 u32 max_cap;
99356b03b431f9 Vivek Gautam 2019-07-18 92 u32 priority;
99356b03b431f9 Vivek Gautam 2019-07-18 93 bool fixed_size;
99356b03b431f9 Vivek Gautam 2019-07-18 94 u32 bonus_ways;
99356b03b431f9 Vivek Gautam 2019-07-18 95 u32 res_ways;
99356b03b431f9 Vivek Gautam 2019-07-18 96 u32 cache_mode;
99356b03b431f9 Vivek Gautam 2019-07-18 97 u32 probe_target_ways;
99356b03b431f9 Vivek Gautam 2019-07-18 98 bool dis_cap_alloc;
99356b03b431f9 Vivek Gautam 2019-07-18 99 bool retain_on_pc;
99356b03b431f9 Vivek Gautam 2019-07-18 100 bool activate_on_init;
c4df37fe186de4 Manivannan Sadhasivam 2020-11-30 101 bool write_scid_en;
2b8175a1f10836 Sai Prakash Ranjan 2022-01-28 102 bool write_scid_cacheable_en;
99356b03b431f9 Vivek Gautam 2019-07-18 103 };
99356b03b431f9 Vivek Gautam 2019-07-18 104

:::::: The code at line 88 was first introduced by commit
:::::: 99356b03b431f9589bbaec2bc5bacceccb3dd99a soc: qcom: Make llcc-qcom a generic driver

:::::: TO: Vivek Gautam <vivek.gautam@xxxxxxxxxxxxxx>
:::::: CC: Bjorn Andersson <bjorn.andersson@xxxxxxxxxx>

--
0-DAY CI Kernel Test Service
https://01.org/lkp

Next message: Geert Uytterhoeven: "[PATCH 1/2] drm: mxsfb: DRM_MXSFB should depend on ARCH_MXS || ARCH_MXC"
Previous message: Suniel Mahesh: "[PATCH v3 2/2] ARM: dts: sun8i: Add R16 Vista E board from RenewWorldOutreach"
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