Re: [PATCH v5 3/3] asm-generic/io.h: warn in inb() and friends with undefined PCI_IOBASE
From: kernel test robot
Date: Mon May 10 2021 - 09:15:24 EST
Hi Niklas,
I love your patch! Perhaps something to improve:
[auto build test WARNING on soc/for-next]
[also build test WARNING on asm-generic/master v5.13-rc1 next-20210510]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]
url: https://github.com/0day-ci/linux/commits/Niklas-Schnelle/asm-generic-io-h-Silence-Wnull-pointer-arithmetic-warning-on-PCI_IOBASE/20210510-165435
base: https://git.kernel.org/pub/scm/linux/kernel/git/soc/soc.git for-next
config: h8300-randconfig-r035-20210510 (attached as .config)
compiler: h8300-linux-gcc (GCC) 9.3.0
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
# https://github.com/0day-ci/linux/commit/fa75946a8988026bee808b5840438a3908f0a65b
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Niklas-Schnelle/asm-generic-io-h-Silence-Wnull-pointer-arithmetic-warning-on-PCI_IOBASE/20210510-165435
git checkout fa75946a8988026bee808b5840438a3908f0a65b
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross W=1 ARCH=h8300
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>
All warnings (new ones prefixed by >>):
In file included from include/linux/kernel.h:10,
from drivers/media/rc/nuvoton-cir.c:25:
include/linux/scatterlist.h: In function 'sg_set_buf':
include/asm-generic/page.h:89:50: warning: ordered comparison of pointer with null pointer [-Wextra]
89 | #define virt_addr_valid(kaddr) (((void *)(kaddr) >= (void *)PAGE_OFFSET) && \
| ^~
include/linux/compiler.h:78:42: note: in definition of macro 'unlikely'
78 | # define unlikely(x) __builtin_expect(!!(x), 0)
| ^
include/linux/scatterlist.h:137:2: note: in expansion of macro 'BUG_ON'
137 | BUG_ON(!virt_addr_valid(buf));
| ^~~~~~
include/linux/scatterlist.h:137:10: note: in expansion of macro 'virt_addr_valid'
137 | BUG_ON(!virt_addr_valid(buf));
| ^~~~~~~~~~~~~~~
drivers/media/rc/nuvoton-cir.c: In function 'nvt_get_rx_ir_data':
>> drivers/media/rc/nuvoton-cir.c:761:15: warning: iteration 32 invokes undefined behavior [-Waggressive-loop-optimizations]
761 | nvt->buf[i] = nvt_cir_reg_read(nvt, CIR_SRXFIFO);
| ~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/media/rc/nuvoton-cir.c:760:2: note: within this loop
760 | for (i = 0; i < fifocount; i++)
| ^~~
vim +761 drivers/media/rc/nuvoton-cir.c
fbdc781c6ba974 drivers/media/IR/nuvoton-cir.c Jarod Wilson 2010-10-08 747
6d2f5c27880c2c drivers/media/IR/nuvoton-cir.c Jarod Wilson 2010-10-07 748 /* copy data from hardware rx fifo into driver buffer */
6d2f5c27880c2c drivers/media/IR/nuvoton-cir.c Jarod Wilson 2010-10-07 749 static void nvt_get_rx_ir_data(struct nvt_dev *nvt)
6d2f5c27880c2c drivers/media/IR/nuvoton-cir.c Jarod Wilson 2010-10-07 750 {
6db0168821fa4e drivers/media/rc/nuvoton-cir.c Heiner Kallweit 2016-08-02 751 u8 fifocount;
6d2f5c27880c2c drivers/media/IR/nuvoton-cir.c Jarod Wilson 2010-10-07 752 int i;
6d2f5c27880c2c drivers/media/IR/nuvoton-cir.c Jarod Wilson 2010-10-07 753
6d2f5c27880c2c drivers/media/IR/nuvoton-cir.c Jarod Wilson 2010-10-07 754 /* Get count of how many bytes to read from RX FIFO */
6d2f5c27880c2c drivers/media/IR/nuvoton-cir.c Jarod Wilson 2010-10-07 755 fifocount = nvt_cir_reg_read(nvt, CIR_RXFCONT);
6d2f5c27880c2c drivers/media/IR/nuvoton-cir.c Jarod Wilson 2010-10-07 756
6d2f5c27880c2c drivers/media/IR/nuvoton-cir.c Jarod Wilson 2010-10-07 757 nvt_dbg("attempting to fetch %u bytes from hw rx fifo", fifocount);
6d2f5c27880c2c drivers/media/IR/nuvoton-cir.c Jarod Wilson 2010-10-07 758
6d2f5c27880c2c drivers/media/IR/nuvoton-cir.c Jarod Wilson 2010-10-07 759 /* Read fifocount bytes from CIR Sample RX FIFO register */
6db0168821fa4e drivers/media/rc/nuvoton-cir.c Heiner Kallweit 2016-08-02 760 for (i = 0; i < fifocount; i++)
6db0168821fa4e drivers/media/rc/nuvoton-cir.c Heiner Kallweit 2016-08-02 @761 nvt->buf[i] = nvt_cir_reg_read(nvt, CIR_SRXFIFO);
6d2f5c27880c2c drivers/media/IR/nuvoton-cir.c Jarod Wilson 2010-10-07 762
bacf8351f23cfd drivers/media/rc/nuvoton-cir.c Heiner Kallweit 2016-08-02 763 nvt->pkts = fifocount;
6d2f5c27880c2c drivers/media/IR/nuvoton-cir.c Jarod Wilson 2010-10-07 764 nvt_dbg("%s: pkts now %d", __func__, nvt->pkts);
6d2f5c27880c2c drivers/media/IR/nuvoton-cir.c Jarod Wilson 2010-10-07 765
6d2f5c27880c2c drivers/media/IR/nuvoton-cir.c Jarod Wilson 2010-10-07 766 nvt_process_rx_ir_data(nvt);
6d2f5c27880c2c drivers/media/IR/nuvoton-cir.c Jarod Wilson 2010-10-07 767 }
6d2f5c27880c2c drivers/media/IR/nuvoton-cir.c Jarod Wilson 2010-10-07 768
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0-DAY CI Kernel Test Service, Intel Corporation
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