Re: [PATCH net-next] sock: make SKB_FRAG_PAGE_ORDER equal to PAGE_ALLOC_COSTLY_ORDER

[kernel test robot <lkp@intel.com>]

Hi Yajun,

kernel test robot noticed the following build warnings:

[auto build test WARNING on net-next/main]

url:    https://github.com/intel-lab-lkp/linux/commits/Yajun-Deng/sock-make-SKB_FRAG_PAGE_ORDER-equal-to-PAGE_ALLOC_COSTLY_ORDER/20241217-185748
base:   net-next/main
patch link:    https://lore.kernel.org/r/20241217105659.2215649-1-yajun.deng%40linux.dev
patch subject: [PATCH net-next] sock: make SKB_FRAG_PAGE_ORDER equal to PAGE_ALLOC_COSTLY_ORDER
config: openrisc-defconfig (https://download.01.org/0day-ci/archive/20241220/202412202122.04V0tnNx-lkp@intel.com/config)
compiler: or1k-linux-gcc (GCC) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241220/202412202122.04V0tnNx-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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202412202122.04V0tnNx-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from arch/openrisc/include/asm/page.h:18,
                    from arch/openrisc/include/asm/processor.h:19,
                    from arch/openrisc/include/asm/thread_info.h:22,
                    from include/linux/thread_info.h:60,
                    from include/asm-generic/preempt.h:5,
                    from ./arch/openrisc/include/generated/asm/preempt.h:1,
                    from include/linux/preempt.h:79,
                    from include/linux/spinlock.h:56,
                    from include/linux/wait.h:9,
                    from include/linux/wait_bit.h:8,
                    from include/linux/fs.h:6,
                    from include/linux/highmem.h:5,
                    from include/linux/bvec.h:10,
                    from include/linux/skbuff.h:17,
                    from include/linux/ip.h:16,
                    from include/net/ip.h:22,
                    from include/linux/errqueue.h:6,
                    from net/core/sock.c:91:
   net/core/sock.c: In function 'skb_page_frag_refill':
>> include/vdso/page.h:15:25: warning: conversion from 'long unsigned int' to '__u16' {aka 'short unsigned int'} changes value from '65536' to '0' [-Woverflow]
      15 | #define PAGE_SIZE       (_AC(1,UL) << CONFIG_PAGE_SHIFT)
         |                         ^
   net/core/sock.c:3044:39: note: in expansion of macro 'PAGE_SIZE'
    3044 |                         pfrag->size = PAGE_SIZE << SKB_FRAG_PAGE_ORDER;
         |                                       ^~~~~~~~~


vim +15 include/vdso/page.h

efe8419ae78d65 Vincenzo Frascino 2024-10-14  14  
efe8419ae78d65 Vincenzo Frascino 2024-10-14 @15  #define PAGE_SIZE	(_AC(1,UL) << CONFIG_PAGE_SHIFT)
efe8419ae78d65 Vincenzo Frascino 2024-10-14  16  

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