Re: [PATCH bpf-next v1 10/15] bpf: Wire up freeing of referenced PTR_TO_BTF_ID in map

Hi Kumar,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on next-20220217]
[cannot apply to bpf-next/master bpf/master linus/master v5.17-rc4 v5.17-rc3 v5.17-rc2 v5.17-rc5]
[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/Kumar-Kartikeya-Dwivedi/Introduce-typed-pointer-support-in-BPF-maps/20220220-215105
base:    3c30cf91b5ecc7272b3d2942ae0505dd8320b81c
config: mips-randconfig-r012-20220220 (https://download.01.org/0day-ci/archive/20220221/202202210651.wyTgHcwt-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project d271fc04d5b97b12e6b797c6067d3c96a8d7470e)
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 mips cross compiling tool for clang build
        # apt-get install binutils-mips-linux-gnu
        # https://github.com/0day-ci/linux/commit/09a47522ec608218eb6aabd5011316d78ad245e0
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Kumar-Kartikeya-Dwivedi/Introduce-typed-pointer-support-in-BPF-maps/20220220-215105
        git checkout 09a47522ec608218eb6aabd5011316d78ad245e0
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=mips SHELL=/bin/bash kernel/bpf/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <redacted>

All errors (new ones prefixed by >>):

   In file included from kernel/bpf/syscall.c:4:
   In file included from include/linux/bpf.h:9:
   In file included from include/linux/workqueue.h:9:
   In file included from include/linux/timer.h:6:
   In file included from include/linux/ktime.h:24:
   In file included from include/linux/time.h:60:
   In file included from include/linux/time32.h:13:
   In file included from include/linux/timex.h:65:
   In file included from arch/mips/include/asm/timex.h:19:
   In file included from arch/mips/include/asm/cpu-type.h:12:
   In file included from include/linux/smp.h:13:
   In file included from include/linux/cpumask.h:13:
   In file included from include/linux/atomic.h:7:
   In file included from arch/mips/include/asm/atomic.h:23:

quoted

arch/mips/include/asm/cmpxchg.h:83:11: error: call to __xchg_called_with_bad_pointer declared with 'error' attribute: Bad argument size for xchg

                           return __xchg_called_with_bad_pointer();
                                  ^
   1 error generated.

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for OMAP_GPMC
   Depends on MEMORY && OF_ADDRESS
   Selected by
   - MTD_NAND_OMAP2 && MTD && MTD_RAW_NAND && (ARCH_OMAP2PLUS || ARCH_KEYSTONE || ARCH_K3 || COMPILE_TEST && HAS_IOMEM


vim +/error +83 arch/mips/include/asm/cmpxchg.h

5154f3b4194910 Paul Burton         2017-06-09  66  
b70eb30056dc84 Paul Burton         2017-06-09  67  extern unsigned long __xchg_small(volatile void *ptr, unsigned long val,
b70eb30056dc84 Paul Burton         2017-06-09  68  				  unsigned int size);
b70eb30056dc84 Paul Burton         2017-06-09  69  
46f1619500d022 Thomas Bogendoerfer 2019-10-09  70  static __always_inline
46f1619500d022 Thomas Bogendoerfer 2019-10-09  71  unsigned long __xchg(volatile void *ptr, unsigned long x, int size)
b81947c646bfef David Howells       2012-03-28  72  {
b81947c646bfef David Howells       2012-03-28  73  	switch (size) {
b70eb30056dc84 Paul Burton         2017-06-09  74  	case 1:
b70eb30056dc84 Paul Burton         2017-06-09  75  	case 2:
b70eb30056dc84 Paul Burton         2017-06-09  76  		return __xchg_small(ptr, x, size);
b70eb30056dc84 Paul Burton         2017-06-09  77  
b81947c646bfef David Howells       2012-03-28  78  	case 4:
62c6081dca75d6 Paul Burton         2017-06-09  79  		return __xchg_asm("ll", "sc", (volatile u32 *)ptr, x);
62c6081dca75d6 Paul Burton         2017-06-09  80  
b81947c646bfef David Howells       2012-03-28  81  	case 8:
62c6081dca75d6 Paul Burton         2017-06-09  82  		if (!IS_ENABLED(CONFIG_64BIT))
62c6081dca75d6 Paul Burton         2017-06-09 @83  			return __xchg_called_with_bad_pointer();
62c6081dca75d6 Paul Burton         2017-06-09  84  
62c6081dca75d6 Paul Burton         2017-06-09  85  		return __xchg_asm("lld", "scd", (volatile u64 *)ptr, x);
62c6081dca75d6 Paul Burton         2017-06-09  86  
d15dc68c1143e2 Paul Burton         2017-06-09  87  	default:
d15dc68c1143e2 Paul Burton         2017-06-09  88  		return __xchg_called_with_bad_pointer();
b81947c646bfef David Howells       2012-03-28  89  	}
b81947c646bfef David Howells       2012-03-28  90  }
b81947c646bfef David Howells       2012-03-28  91  

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