tree: https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git dev.2024.03.27b
head: 786fab3085d764055a78edb54023420920344333
commit: 4977f14819143065158973013b51a3c1f926e61e [63/69] sh: Emulate one-byte and two-byte cmpxchg
config: sh-defconfig (https://download.01.org/0day-ci/archive/20240329/[email protected]/config)
compiler: sh4-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240329/[email protected]/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 <[email protected]>
| Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/
All errors (new ones prefixed by >>):
In file included from arch/sh/include/asm/atomic.h:19,
from include/linux/atomic.h:7,
from include/asm-generic/bitops/lock.h:5,
from arch/sh/include/asm/bitops.h:63,
from include/linux/bitops.h:68,
from include/linux/log2.h:12,
from kernel/bounds.c:13:
arch/sh/include/asm/cmpxchg.h: In function '__cmpxchg':
>> arch/sh/include/asm/cmpxchg.h:60:24: error: implicit declaration of function 'cmpxchg_emu_u8' [-Werror=implicit-function-declaration]
60 | return cmpxchg_emu_u8((volatile u8 *)ptr, old, new);
| ^~~~~~~~~~~~~~
>> arch/sh/include/asm/cmpxchg.h:62:24: error: implicit declaration of function 'cmpxchg_emu_u16' [-Werror=implicit-function-declaration]
62 | return cmpxchg_emu_u16((volatile u16 *)ptr, old, new);
| ^~~~~~~~~~~~~~~
cc1: some warnings being treated as errors
make[3]: *** [scripts/Makefile.build:117: kernel/bounds.s] Error 1
make[3]: Target 'prepare' not remade because of errors.
make[2]: *** [Makefile:1197: prepare0] Error 2
make[2]: Target 'prepare' not remade because of errors.
make[1]: *** [Makefile:240: __sub-make] Error 2
make[1]: Target 'prepare' not remade because of errors.
make: *** [Makefile:240: __sub-make] Error 2
make: Target 'prepare' not remade because of errors.
vim +/cmpxchg_emu_u8 +60 arch/sh/include/asm/cmpxchg.h
54
55 static inline unsigned long __cmpxchg(volatile void * ptr, unsigned long old,
56 unsigned long new, int size)
57 {
58 switch (size) {
59 case 1:
> 60 return cmpxchg_emu_u8((volatile u8 *)ptr, old, new);
61 case 2:
> 62 return cmpxchg_emu_u16((volatile u16 *)ptr, old, new);
63 case 4:
64 return __cmpxchg_u32(ptr, old, new);
65 }
66 __cmpxchg_called_with_bad_pointer();
67 return old;
68 }
69
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