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Date: Wed, 23 Aug 2023 06:25:40 +0800
From: kernel test robot <lkp@...el.com>
To: Rohan McLure <rmclure@...ux.ibm.com>
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
linux-kernel@...r.kernel.org, Michael Ellerman <mpe@...erman.id.au>
Subject: drivers/media/dvb-frontends/dib0090.c:2542:12: warning: stack frame
size (2080) exceeds limit (2048) in 'dib0090_set_params'
Hi Rohan,
FYI, the error/warning was bisected to this commit, please ignore it if it's irrelevant.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 89bf6209cad66214d3774dac86b6bbf2aec6a30d
commit: 6f0926c00565a91f3bd7ca1aa05db307daed5e0f powerpc/kcsan: Add KCSAN Support
date: 6 months ago
config: powerpc64-randconfig-r032-20230823 (https://download.01.org/0day-ci/archive/20230823/202308230658.YWtkC9Oz-lkp@intel.com/config)
compiler: clang version 16.0.4 (https://github.com/llvm/llvm-project.git ae42196bc493ffe877a7e3dff8be32035dea4d07)
reproduce: (https://download.01.org/0day-ci/archive/20230823/202308230658.YWtkC9Oz-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/202308230658.YWtkC9Oz-lkp@intel.com/
All warnings (new ones prefixed by >>):
In file included from include/linux/swap.h:9:
In file included from include/linux/memcontrol.h:13:
In file included from include/linux/cgroup.h:26:
In file included from include/linux/kernel_stat.h:9:
In file included from include/linux/interrupt.h:11:
In file included from include/linux/hardirq.h:11:
In file included from arch/powerpc/include/asm/hardirq.h:6:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
In file included from arch/powerpc/include/asm/io.h:640:
arch/powerpc/include/asm/io-defs.h:47:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
DEF_PCI_AC_NORET(insl, (unsigned long p, void *b, unsigned long c),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/io.h:637:3: note: expanded from macro 'DEF_PCI_AC_NORET'
__do_##name al; \
^~~~~~~~~~~~~~
<scratch space>:207:1: note: expanded from here
__do_insl
^
arch/powerpc/include/asm/io.h:579:56: note: expanded from macro '__do_insl'
#define __do_insl(p, b, n) readsl((PCI_IO_ADDR)_IO_BASE+(p), (b), (n))
~~~~~~~~~~~~~~~~~~~~~^
In file included from drivers/media/dvb-frontends/dib0090.c:15:
In file included from include/linux/i2c.h:19:
In file included from include/linux/regulator/consumer.h:35:
In file included from include/linux/suspend.h:5:
In file included from include/linux/swap.h:9:
In file included from include/linux/memcontrol.h:13:
In file included from include/linux/cgroup.h:26:
In file included from include/linux/kernel_stat.h:9:
In file included from include/linux/interrupt.h:11:
In file included from include/linux/hardirq.h:11:
In file included from arch/powerpc/include/asm/hardirq.h:6:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
In file included from arch/powerpc/include/asm/io.h:640:
arch/powerpc/include/asm/io-defs.h:49:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
DEF_PCI_AC_NORET(outsb, (unsigned long p, const void *b, unsigned long c),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/io.h:637:3: note: expanded from macro 'DEF_PCI_AC_NORET'
__do_##name al; \
^~~~~~~~~~~~~~
<scratch space>:211:1: note: expanded from here
__do_outsb
^
arch/powerpc/include/asm/io.h:580:58: note: expanded from macro '__do_outsb'
#define __do_outsb(p, b, n) writesb((PCI_IO_ADDR)_IO_BASE+(p),(b),(n))
~~~~~~~~~~~~~~~~~~~~~^
In file included from drivers/media/dvb-frontends/dib0090.c:15:
In file included from include/linux/i2c.h:19:
In file included from include/linux/regulator/consumer.h:35:
In file included from include/linux/suspend.h:5:
In file included from include/linux/swap.h:9:
In file included from include/linux/memcontrol.h:13:
In file included from include/linux/cgroup.h:26:
In file included from include/linux/kernel_stat.h:9:
In file included from include/linux/interrupt.h:11:
In file included from include/linux/hardirq.h:11:
In file included from arch/powerpc/include/asm/hardirq.h:6:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
In file included from arch/powerpc/include/asm/io.h:640:
arch/powerpc/include/asm/io-defs.h:51:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
DEF_PCI_AC_NORET(outsw, (unsigned long p, const void *b, unsigned long c),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/io.h:637:3: note: expanded from macro 'DEF_PCI_AC_NORET'
__do_##name al; \
^~~~~~~~~~~~~~
<scratch space>:215:1: note: expanded from here
__do_outsw
^
arch/powerpc/include/asm/io.h:581:58: note: expanded from macro '__do_outsw'
#define __do_outsw(p, b, n) writesw((PCI_IO_ADDR)_IO_BASE+(p),(b),(n))
~~~~~~~~~~~~~~~~~~~~~^
In file included from drivers/media/dvb-frontends/dib0090.c:15:
In file included from include/linux/i2c.h:19:
In file included from include/linux/regulator/consumer.h:35:
In file included from include/linux/suspend.h:5:
In file included from include/linux/swap.h:9:
In file included from include/linux/memcontrol.h:13:
In file included from include/linux/cgroup.h:26:
In file included from include/linux/kernel_stat.h:9:
In file included from include/linux/interrupt.h:11:
In file included from include/linux/hardirq.h:11:
In file included from arch/powerpc/include/asm/hardirq.h:6:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
In file included from arch/powerpc/include/asm/io.h:640:
arch/powerpc/include/asm/io-defs.h:53:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
DEF_PCI_AC_NORET(outsl, (unsigned long p, const void *b, unsigned long c),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/io.h:637:3: note: expanded from macro 'DEF_PCI_AC_NORET'
__do_##name al; \
^~~~~~~~~~~~~~
<scratch space>:219:1: note: expanded from here
__do_outsl
^
arch/powerpc/include/asm/io.h:582:58: note: expanded from macro '__do_outsl'
#define __do_outsl(p, b, n) writesl((PCI_IO_ADDR)_IO_BASE+(p),(b),(n))
~~~~~~~~~~~~~~~~~~~~~^
>> drivers/media/dvb-frontends/dib0090.c:2542:12: warning: stack frame size (2080) exceeds limit (2048) in 'dib0090_set_params' [-Wframe-larger-than]
static int dib0090_set_params(struct dvb_frontend *fe)
^
1997/2080 (96.01%) spills, 83/2080 (3.99%) variables
13 warnings generated.
vim +/dib0090_set_params +2542 drivers/media/dvb-frontends/dib0090.c
03245a5ee69a5f drivers/media/dvb/frontends/dib0090.c Olivier Grenie 2009-12-04 2541
14d24d148c7521 drivers/media/dvb/frontends/dib0090.c Mauro Carvalho Chehab 2011-12-24 @2542 static int dib0090_set_params(struct dvb_frontend *fe)
03245a5ee69a5f drivers/media/dvb/frontends/dib0090.c Olivier Grenie 2009-12-04 2543 {
03245a5ee69a5f drivers/media/dvb/frontends/dib0090.c Olivier Grenie 2009-12-04 2544 struct dib0090_state *state = fe->tuner_priv;
28fafca78797be drivers/media/dvb/frontends/dib0090.c Olivier Grenie 2011-01-04 2545 u32 ret;
03245a5ee69a5f drivers/media/dvb/frontends/dib0090.c Olivier Grenie 2009-12-04 2546
03245a5ee69a5f drivers/media/dvb/frontends/dib0090.c Olivier Grenie 2009-12-04 2547 state->tune_state = CT_TUNER_START;
03245a5ee69a5f drivers/media/dvb/frontends/dib0090.c Olivier Grenie 2009-12-04 2548
03245a5ee69a5f drivers/media/dvb/frontends/dib0090.c Olivier Grenie 2009-12-04 2549 do {
03245a5ee69a5f drivers/media/dvb/frontends/dib0090.c Olivier Grenie 2009-12-04 2550 ret = dib0090_tune(fe);
0de04ca1dc0bd3 drivers/media/dvb-frontends/dib0090.c Mauro Carvalho Chehab 2014-07-04 2551 if (ret == FE_CALLBACK_TIME_NEVER)
03245a5ee69a5f drivers/media/dvb/frontends/dib0090.c Olivier Grenie 2009-12-04 2552 break;
0de04ca1dc0bd3 drivers/media/dvb-frontends/dib0090.c Mauro Carvalho Chehab 2014-07-04 2553
0de04ca1dc0bd3 drivers/media/dvb-frontends/dib0090.c Mauro Carvalho Chehab 2014-07-04 2554 /*
0de04ca1dc0bd3 drivers/media/dvb-frontends/dib0090.c Mauro Carvalho Chehab 2014-07-04 2555 * Despite dib0090_tune returns time at a 0.1 ms range,
0de04ca1dc0bd3 drivers/media/dvb-frontends/dib0090.c Mauro Carvalho Chehab 2014-07-04 2556 * the actual sleep time depends on CONFIG_HZ. The worse case
0de04ca1dc0bd3 drivers/media/dvb-frontends/dib0090.c Mauro Carvalho Chehab 2014-07-04 2557 * is when CONFIG_HZ=100. In such case, the minimum granularity
0de04ca1dc0bd3 drivers/media/dvb-frontends/dib0090.c Mauro Carvalho Chehab 2014-07-04 2558 * is 10ms. On some real field tests, the tuner sometimes don't
0de04ca1dc0bd3 drivers/media/dvb-frontends/dib0090.c Mauro Carvalho Chehab 2014-07-04 2559 * lock when this timer is lower than 10ms. So, enforce a 10ms
0de04ca1dc0bd3 drivers/media/dvb-frontends/dib0090.c Mauro Carvalho Chehab 2014-07-04 2560 * granularity and use usleep_range() instead of msleep().
0de04ca1dc0bd3 drivers/media/dvb-frontends/dib0090.c Mauro Carvalho Chehab 2014-07-04 2561 */
0de04ca1dc0bd3 drivers/media/dvb-frontends/dib0090.c Mauro Carvalho Chehab 2014-07-04 2562 ret = 10 * (ret + 99)/100;
0de04ca1dc0bd3 drivers/media/dvb-frontends/dib0090.c Mauro Carvalho Chehab 2014-07-04 2563 usleep_range(ret * 1000, (ret + 1) * 1000);
03245a5ee69a5f drivers/media/dvb/frontends/dib0090.c Olivier Grenie 2009-12-04 2564 } while (state->tune_state != CT_TUNER_STOP);
03245a5ee69a5f drivers/media/dvb/frontends/dib0090.c Olivier Grenie 2009-12-04 2565
03245a5ee69a5f drivers/media/dvb/frontends/dib0090.c Olivier Grenie 2009-12-04 2566 return 0;
03245a5ee69a5f drivers/media/dvb/frontends/dib0090.c Olivier Grenie 2009-12-04 2567 }
03245a5ee69a5f drivers/media/dvb/frontends/dib0090.c Olivier Grenie 2009-12-04 2568
:::::: The code at line 2542 was first introduced by commit
:::::: 14d24d148c7521b2b88b396652e36f55d061e195 [media] tuners: remove dvb_frontend_parameters from set_params()
:::::: TO: Mauro Carvalho Chehab <mchehab@...hat.com>
:::::: CC: Mauro Carvalho Chehab <mchehab@...hat.com>
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