1:51 p.m.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 642b151f45dd54809ea00ecd3976a56c1ec9b53d
commit: 295bcca84916cb5079140a89fccb472bb8d1f6e2 linux/bits.h: add compile time sanity
check of GENMASK inputs
date: 6 weeks ago
config: arm-defconfig (attached as .config)
compiler: arm-linux-gnueabi-gcc (GCC) 9.3.0
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O
~/bin/make.cross
chmod +x ~/bin/make.cross
git checkout 295bcca84916cb5079140a89fccb472bb8d1f6e2
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm
If you fix the issue, kindly add following tag as appropriate
Reported-by: kbuild test robot <lkp(a)intel.com>
All warnings (new ones prefixed by >>, old ones prefixed by <<):
In file included from include/linux/bits.h:23,
from include/linux/bitops.h:5,
from include/linux/kernel.h:12,
from include/asm-generic/bug.h:19,
from arch/arm/include/asm/bug.h:60,
from include/linux/bug.h:5,
from include/linux/mmdebug.h:5,
from include/linux/gfp.h:5,
from include/linux/slab.h:15,
from drivers/clk/socfpga/clk-gate.c:8:
drivers/clk/socfpga/clk-gate.c: In function 'socfpga_clk_recalc_rate':
include/linux/bits.h:26:28: warning: comparison of unsigned expression < 0 is always
false [-Wtype-limits]
26 | __builtin_constant_p((l) > (h)), (l) > (h), 0)))
| ^
include/linux/build_bug.h:16:62: note: in definition of macro 'BUILD_BUG_ON_ZERO'
16 | #define BUILD_BUG_ON_ZERO(e) ((int)(sizeof(struct { int:(-!!(e)); })))
| ^
include/linux/bits.h:39:3: note: in expansion of macro 'GENMASK_INPUT_CHECK'
39 | (GENMASK_INPUT_CHECK(h, l) + __GENMASK(h, l))
| ^~~~~~~~~~~~~~~~~~~
> drivers/clk/socfpga/clk-gate.c:100:10: note: in expansion of
macro 'GENMASK'
100 | val &= GENMASK(socfpgaclk->width - 1, 0);
| ^~~~~~~
include/linux/bits.h:26:40: warning: comparison of unsigned expression < 0 is always
false [-Wtype-limits]
26 | __builtin_constant_p((l) > (h)), (l) > (h), 0)))
| ^
include/linux/build_bug.h:16:62: note: in definition of macro 'BUILD_BUG_ON_ZERO'
16 | #define BUILD_BUG_ON_ZERO(e) ((int)(sizeof(struct { int:(-!!(e)); })))
| ^
include/linux/bits.h:39:3: note: in expansion of macro 'GENMASK_INPUT_CHECK'
39 | (GENMASK_INPUT_CHECK(h, l) + __GENMASK(h, l))
| ^~~~~~~~~~~~~~~~~~~
> drivers/clk/socfpga/clk-gate.c:100:10: note: in expansion of
macro 'GENMASK'
100 | val &= GENMASK(socfpgaclk->width - 1, 0);
| ^~~~~~~
--
In file included from include/linux/bits.h:23,
from include/linux/bitops.h:5,
from include/linux/kernel.h:12,
from include/asm-generic/bug.h:19,
from arch/arm/include/asm/bug.h:60,
from include/linux/bug.h:5,
from include/linux/mmdebug.h:5,
from include/linux/gfp.h:5,
from include/linux/slab.h:15,
from drivers/clk/socfpga/clk-periph.c:8:
drivers/clk/socfpga/clk-periph.c: In function 'clk_periclk_recalc_rate':
include/linux/bits.h:26:28: warning: comparison of unsigned expression < 0 is always
false [-Wtype-limits]
26 | __builtin_constant_p((l) > (h)), (l) > (h), 0)))
| ^
include/linux/build_bug.h:16:62: note: in definition of macro 'BUILD_BUG_ON_ZERO'
16 | #define BUILD_BUG_ON_ZERO(e) ((int)(sizeof(struct { int:(-!!(e)); })))
| ^
include/linux/bits.h:39:3: note: in expansion of macro 'GENMASK_INPUT_CHECK'
39 | (GENMASK_INPUT_CHECK(h, l) + __GENMASK(h, l))
| ^~~~~~~~~~~~~~~~~~~
> drivers/clk/socfpga/clk-periph.c:28:11: note: in expansion of
macro 'GENMASK'
28 | val &= GENMASK(socfpgaclk->width - 1, 0);
| ^~~~~~~
include/linux/bits.h:26:40: warning: comparison of unsigned expression < 0 is always
false [-Wtype-limits]
26 | __builtin_constant_p((l) > (h)), (l) > (h), 0)))
| ^
include/linux/build_bug.h:16:62: note: in definition of macro 'BUILD_BUG_ON_ZERO'
16 | #define BUILD_BUG_ON_ZERO(e) ((int)(sizeof(struct { int:(-!!(e)); })))
| ^
include/linux/bits.h:39:3: note: in expansion of macro 'GENMASK_INPUT_CHECK'
39 | (GENMASK_INPUT_CHECK(h, l) + __GENMASK(h, l))
| ^~~~~~~~~~~~~~~~~~~
> drivers/clk/socfpga/clk-periph.c:28:11: note: in expansion of
macro 'GENMASK'
28 | val &= GENMASK(socfpgaclk->width - 1, 0);
| ^~~~~~~
--
In file included from include/linux/bits.h:23,
from include/linux/bitops.h:5,
from include/linux/kernel.h:12,
from include/asm-generic/bug.h:19,
from arch/arm/include/asm/bug.h:60,
from include/linux/bug.h:5,
from include/linux/mmdebug.h:5,
from include/linux/gfp.h:5,
from include/linux/slab.h:15,
from drivers/clk/socfpga/clk-periph-a10.c:5:
drivers/clk/socfpga/clk-periph-a10.c: In function 'clk_periclk_recalc_rate':
include/linux/bits.h:26:28: warning: comparison of unsigned expression < 0 is always
false [-Wtype-limits]
26 | __builtin_constant_p((l) > (h)), (l) > (h), 0)))
| ^
include/linux/build_bug.h:16:62: note: in definition of macro 'BUILD_BUG_ON_ZERO'
16 | #define BUILD_BUG_ON_ZERO(e) ((int)(sizeof(struct { int:(-!!(e)); })))
| ^
include/linux/bits.h:39:3: note: in expansion of macro 'GENMASK_INPUT_CHECK'
39 | (GENMASK_INPUT_CHECK(h, l) + __GENMASK(h, l))
| ^~~~~~~~~~~~~~~~~~~
> drivers/clk/socfpga/clk-periph-a10.c:30:10: note: in expansion of
macro 'GENMASK'
30 | div &= GENMASK(socfpgaclk->width - 1, 0);
| ^~~~~~~
include/linux/bits.h:26:40: warning: comparison of unsigned expression < 0 is always
false [-Wtype-limits]
26 | __builtin_constant_p((l) > (h)), (l) > (h), 0)))
| ^
include/linux/build_bug.h:16:62: note: in definition of macro 'BUILD_BUG_ON_ZERO'
16 | #define BUILD_BUG_ON_ZERO(e) ((int)(sizeof(struct { int:(-!!(e)); })))
| ^
include/linux/bits.h:39:3: note: in expansion of macro 'GENMASK_INPUT_CHECK'
39 | (GENMASK_INPUT_CHECK(h, l) + __GENMASK(h, l))
| ^~~~~~~~~~~~~~~~~~~
> drivers/clk/socfpga/clk-periph-a10.c:30:10: note: in expansion of
macro 'GENMASK'
30 | div &= GENMASK(socfpgaclk->width - 1, 0);
| ^~~~~~~
--
In file included from include/linux/bits.h:23,
from include/linux/bitops.h:5,
from include/linux/kernel.h:12,
from include/asm-generic/bug.h:19,
from arch/arm/include/asm/bug.h:60,
from include/linux/bug.h:5,
from include/linux/mmdebug.h:5,
from include/linux/gfp.h:5,
from include/linux/slab.h:15,
from drivers/clk/socfpga/clk-gate-a10.c:5:
drivers/clk/socfpga/clk-gate-a10.c: In function 'socfpga_gate_clk_recalc_rate':
include/linux/bits.h:26:28: warning: comparison of unsigned expression < 0 is always
false [-Wtype-limits]
26 | __builtin_constant_p((l) > (h)), (l) > (h), 0)))
| ^
include/linux/build_bug.h:16:62: note: in definition of macro 'BUILD_BUG_ON_ZERO'
16 | #define BUILD_BUG_ON_ZERO(e) ((int)(sizeof(struct { int:(-!!(e)); })))
| ^
include/linux/bits.h:39:3: note: in expansion of macro 'GENMASK_INPUT_CHECK'
39 | (GENMASK_INPUT_CHECK(h, l) + __GENMASK(h, l))
| ^~~~~~~~~~~~~~~~~~~
> drivers/clk/socfpga/clk-gate-a10.c:31:10: note: in expansion of
macro 'GENMASK'
31 | val &= GENMASK(socfpgaclk->width - 1, 0);
| ^~~~~~~
include/linux/bits.h:26:40: warning: comparison of unsigned expression < 0 is always
false [-Wtype-limits]
26 | __builtin_constant_p((l) > (h)), (l) > (h), 0)))
| ^
include/linux/build_bug.h:16:62: note: in definition of macro 'BUILD_BUG_ON_ZERO'
16 | #define BUILD_BUG_ON_ZERO(e) ((int)(sizeof(struct { int:(-!!(e)); })))
| ^
include/linux/bits.h:39:3: note: in expansion of macro 'GENMASK_INPUT_CHECK'
39 | (GENMASK_INPUT_CHECK(h, l) + __GENMASK(h, l))
| ^~~~~~~~~~~~~~~~~~~
> drivers/clk/socfpga/clk-gate-a10.c:31:10: note: in expansion of
macro 'GENMASK'
31 | val &= GENMASK(socfpgaclk->width - 1, 0);
| ^~~~~~~
vim +/GENMASK +100 drivers/clk/socfpga/clk-gate.c
97259e99bdc914 Steffen Trumtrar 2014-01-06 89
97259e99bdc914 Steffen Trumtrar 2014-01-06 90 static unsigned long
socfpga_clk_recalc_rate(struct clk_hw *hwclk,
97259e99bdc914 Steffen Trumtrar 2014-01-06 91 unsigned long parent_rate)
97259e99bdc914 Steffen Trumtrar 2014-01-06 92 {
97259e99bdc914 Steffen Trumtrar 2014-01-06 93 struct socfpga_gate_clk *socfpgaclk =
to_socfpga_gate_clk(hwclk);
97259e99bdc914 Steffen Trumtrar 2014-01-06 94 u32 div = 1, val;
97259e99bdc914 Steffen Trumtrar 2014-01-06 95
97259e99bdc914 Steffen Trumtrar 2014-01-06 96 if (socfpgaclk->fixed_div)
97259e99bdc914 Steffen Trumtrar 2014-01-06 97 div = socfpgaclk->fixed_div;
97259e99bdc914 Steffen Trumtrar 2014-01-06 98 else if (socfpgaclk->div_reg) {
97259e99bdc914 Steffen Trumtrar 2014-01-06 99 val = readl(socfpgaclk->div_reg)
>> socfpgaclk->shift;
25d4d341d31b34 Andy Shevchenko 2015-07-13 @100 val &= GENMASK(socfpgaclk->width
- 1, 0);
97259e99bdc914 Steffen Trumtrar 2014-01-06 101 /* Check for GPIO_DB_CLK by its offset
*/
97259e99bdc914 Steffen Trumtrar 2014-01-06 102 if ((int) socfpgaclk->div_reg &
SOCFPGA_GPIO_DB_CLK_OFFSET)
97259e99bdc914 Steffen Trumtrar 2014-01-06 103 div = val + 1;
97259e99bdc914 Steffen Trumtrar 2014-01-06 104 else
97259e99bdc914 Steffen Trumtrar 2014-01-06 105 div = (1 << val);
97259e99bdc914 Steffen Trumtrar 2014-01-06 106 }
97259e99bdc914 Steffen Trumtrar 2014-01-06 107
97259e99bdc914 Steffen Trumtrar 2014-01-06 108 return parent_rate / div;
97259e99bdc914 Steffen Trumtrar 2014-01-06 109 }
97259e99bdc914 Steffen Trumtrar 2014-01-06 110
:::::: The code at line 100 was first introduced by commit
:::::: 25d4d341d31b349836e1b12d10be34b9b575c12b clk: socfpga: switch to GENMASK()
:::::: TO: Andy Shevchenko <andriy.shevchenko(a)linux.intel.com>
:::::: CC: Stephen Boyd <sboyd(a)codeaurora.org>
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org