bpf.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: kernel test robot <lkp@intel.com>
To: Tobias Klauser <tklauser@distanz.ch>,
	Alexei Starovoitov <ast@kernel.org>,
	Daniel Borkmann <daniel@iogearbox.net>,
	Wang YanQing <udknight@gmail.com>
Cc: kbuild-all@lists.01.org, bpf@vger.kernel.org,
	netdev@vger.kernel.org, x86@kernel.org
Subject: Re: [PATCH bpf-next 1/2] bpf, x86: Factor common x86 JIT code
Date: Sat, 11 Jul 2020 11:13:54 +0800	[thread overview]
Message-ID: <202007111131.VDVUrWTd%lkp@intel.com> (raw)
In-Reply-To: <20200629093336.20963-2-tklauser@distanz.ch>

[-- Attachment #1: Type: text/plain, Size: 9532 bytes --]

Hi Tobias,

I love your patch! Perhaps something to improve:

[auto build test WARNING on bpf-next/master]

url:    https://github.com/0day-ci/linux/commits/Tobias-Klauser/bpf-x86-Factor-common-x86-JIT-code/20200630-045932
base:   https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master
config: x86_64-randconfig-s022-20200710 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-14) 9.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.2-37-gc9676a3b-dirty
        # save the attached .config to linux build tree
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>


sparse warnings: (new ones prefixed by >>)

   arch/x86/net/bpf_jit.h:13:24: sparse: sparse: cast truncates bits from constant value (e58948 becomes 48)
   arch/x86/net/bpf_jit.h:15:31: sparse: sparse: cast truncates bits from constant value (e58948 becomes 8948)
   arch/x86/net/bpf_jit.h:13:24: sparse: sparse: cast truncates bits from constant value (ec8148 becomes 48)
   arch/x86/net/bpf_jit.h:15:31: sparse: sparse: cast truncates bits from constant value (ec8148 becomes 8148)
   arch/x86/net/bpf_jit.h:13:24: sparse: sparse: cast truncates bits from constant value (5541 becomes 41)
   arch/x86/net/bpf_jit.h:13:24: sparse: sparse: cast truncates bits from constant value (5641 becomes 41)
   arch/x86/net/bpf_jit.h:13:24: sparse: sparse: cast truncates bits from constant value (5741 becomes 41)
   arch/x86/net/bpf_jit.h:13:24: sparse: sparse: cast truncates bits from constant value (d289 becomes 89)
>> arch/x86/net/bpf_jit.h:13:24: sparse: sparse: cast truncates bits from constant value (1c5639 becomes 39)
   arch/x86/net/bpf_jit.h:15:31: sparse: sparse: cast truncates bits from constant value (1c5639 becomes 5639)
   arch/x86/net/bpf_jit.h:13:24: sparse: sparse: cast truncates bits from constant value (2b76 becomes 76)
   arch/x86/net/bpf_jit.h:13:24: sparse: sparse: cast truncates bits from constant value (858b becomes 8b)
   arch/x86/net/bpf_jit.h:13:24: sparse: sparse: cast truncates bits from constant value (fffffddc becomes dc)
   arch/x86/net/bpf_jit.h:13:24: sparse: sparse: cast truncates bits from constant value (20f883 becomes 83)
   arch/x86/net/bpf_jit.h:15:31: sparse: sparse: cast truncates bits from constant value (20f883 becomes f883)
   arch/x86/net/bpf_jit.h:13:24: sparse: sparse: cast truncates bits from constant value (2077 becomes 77)
   arch/x86/net/bpf_jit.h:13:24: sparse: sparse: cast truncates bits from constant value (1c083 becomes 83)
   arch/x86/net/bpf_jit.h:15:31: sparse: sparse: cast truncates bits from constant value (1c083 becomes c083)
   arch/x86/net/bpf_jit.h:13:24: sparse: sparse: cast truncates bits from constant value (8589 becomes 89)
   arch/x86/net/bpf_jit.h:13:24: sparse: sparse: cast truncates bits from constant value (fffffddc becomes dc)
   arch/x86/net/bpf_jit.h:13:24: sparse: sparse: cast truncates bits from constant value (d6848b48 becomes 48)
   arch/x86/net/bpf_jit.h:15:31: sparse: sparse: cast truncates bits from constant value (d6848b48 becomes 8b48)
   arch/x86/net/bpf_jit.h:13:24: sparse: sparse: cast truncates bits from constant value (190 becomes 90)
   arch/x86/net/bpf_jit.h:13:24: sparse: sparse: cast truncates bits from constant value (c08548 becomes 48)
   arch/x86/net/bpf_jit.h:15:31: sparse: sparse: cast truncates bits from constant value (c08548 becomes 8548)
   arch/x86/net/bpf_jit.h:13:24: sparse: sparse: cast truncates bits from constant value (a74 becomes 74)
   arch/x86/net/bpf_jit.h:13:24: sparse: sparse: cast truncates bits from constant value (30408b48 becomes 48)
   arch/x86/net/bpf_jit.h:15:31: sparse: sparse: cast truncates bits from constant value (30408b48 becomes 8b48)
   arch/x86/net/bpf_jit.h:13:24: sparse: sparse: cast truncates bits from constant value (19c08348 becomes 48)
   arch/x86/net/bpf_jit.h:15:31: sparse: sparse: cast truncates bits from constant value (19c08348 becomes 8348)
   arch/x86/net/bpf_jit.h:13:24: sparse: sparse: cast truncates bits from constant value (e0ff becomes ff)
   arch/x86/net/bpf_jit.h:13:24: sparse: sparse: cast truncates bits from constant value (858b becomes 8b)
   arch/x86/net/bpf_jit.h:13:24: sparse: sparse: cast truncates bits from constant value (fffffddc becomes dc)
   arch/x86/net/bpf_jit.h:13:24: sparse: sparse: cast truncates bits from constant value (20f883 becomes 83)
   arch/x86/net/bpf_jit.h:15:31: sparse: sparse: cast truncates bits from constant value (20f883 becomes f883)
   arch/x86/net/bpf_jit.h:13:24: sparse: sparse: cast truncates bits from constant value (e77 becomes 77)
   arch/x86/net/bpf_jit.h:13:24: sparse: sparse: cast truncates bits from constant value (1c083 becomes 83)
   arch/x86/net/bpf_jit.h:15:31: sparse: sparse: cast truncates bits from constant value (1c083 becomes c083)
   arch/x86/net/bpf_jit.h:13:24: sparse: sparse: cast truncates bits from constant value (8589 becomes 89)
   arch/x86/net/bpf_jit.h:13:24: sparse: sparse: cast truncates bits from constant value (fffffddc becomes dc)
   arch/x86/net/bpf_jit.h:13:24: sparse: sparse: cast truncates bits from constant value (8966 becomes 66)
   arch/x86/net/bpf_jit.h:13:24: sparse: sparse: cast truncates bits from constant value (c3c749 becomes 49)
   arch/x86/net/bpf_jit.h:15:31: sparse: sparse: cast truncates bits from constant value (c3c749 becomes c749)
   arch/x86/net/bpf_jit.h:13:24: sparse: sparse: cast truncates bits from constant value (d231 becomes 31)
   arch/x86/net/bpf_jit.h:13:24: sparse: sparse: cast truncates bits from constant value (f3f749 becomes 49)
   arch/x86/net/bpf_jit.h:15:31: sparse: sparse: cast truncates bits from constant value (f3f749 becomes f749)
   arch/x86/net/bpf_jit.h:13:24: sparse: sparse: cast truncates bits from constant value (f3f741 becomes 41)
   arch/x86/net/bpf_jit.h:15:31: sparse: sparse: cast truncates bits from constant value (f3f741 becomes f741)
   arch/x86/net/bpf_jit.h:13:24: sparse: sparse: cast truncates bits from constant value (d38949 becomes 49)
   arch/x86/net/bpf_jit.h:15:31: sparse: sparse: cast truncates bits from constant value (d38949 becomes 8949)
   arch/x86/net/bpf_jit.h:13:24: sparse: sparse: cast truncates bits from constant value (c38949 becomes 49)
   arch/x86/net/bpf_jit.h:15:31: sparse: sparse: cast truncates bits from constant value (c38949 becomes 8949)
   arch/x86/net/bpf_jit.h:13:24: sparse: sparse: cast truncates bits from constant value (b70f45 becomes 45)
   arch/x86/net/bpf_jit.h:15:31: sparse: sparse: cast truncates bits from constant value (b70f45 becomes f45)
   arch/x86/net/bpf_jit.h:13:24: sparse: sparse: cast truncates bits from constant value (b70f becomes f)
   arch/x86/net/bpf_jit.h:13:24: sparse: sparse: cast truncates bits from constant value (f41 becomes 41)
   arch/x86/net/bpf_jit.h:13:24: sparse: sparse: cast truncates bits from constant value (b70f45 becomes 45)
   arch/x86/net/bpf_jit.h:15:31: sparse: sparse: cast truncates bits from constant value (b70f45 becomes f45)
   arch/x86/net/bpf_jit.h:13:24: sparse: sparse: cast truncates bits from constant value (b70f becomes f)
   arch/x86/net/bpf_jit.h:13:24: sparse: sparse: cast truncates bits from constant value (c641 becomes 41)
   arch/x86/net/bpf_jit.h:13:24: sparse: sparse: cast truncates bits from constant value (c74166 becomes 66)
   arch/x86/net/bpf_jit.h:15:31: sparse: sparse: cast truncates bits from constant value (c74166 becomes 4166)
   arch/x86/net/bpf_jit.h:13:24: sparse: sparse: cast truncates bits from constant value (c766 becomes 66)
   arch/x86/net/bpf_jit.h:13:24: sparse: sparse: cast truncates bits from constant value (c741 becomes 41)
   arch/x86/net/bpf_jit.h:13:24: sparse: sparse: cast truncates bits from constant value (1f0 becomes f0)
   arch/x86/net/bpf_jit.h:13:24: sparse: sparse: cast truncates bits from constant value (5f41 becomes 41)
   arch/x86/net/bpf_jit.h:13:24: sparse: sparse: cast truncates bits from constant value (5e41 becomes 41)
   arch/x86/net/bpf_jit.h:13:24: sparse: sparse: cast truncates bits from constant value (5d41 becomes 41)
   arch/x86/net/bpf_jit.h:13:24: sparse: sparse: cast truncates bits from constant value (f87d8348 becomes 48)
   arch/x86/net/bpf_jit.h:15:31: sparse: sparse: cast truncates bits from constant value (f87d8348 becomes 8348)
   arch/x86/net/bpf_jit.h:13:24: sparse: sparse: cast truncates bits from constant value (e58948 becomes 48)
   arch/x86/net/bpf_jit.h:15:31: sparse: sparse: cast truncates bits from constant value (e58948 becomes 8948)
   arch/x86/net/bpf_jit.h:13:24: sparse: sparse: cast truncates bits from constant value (8c48348 becomes 48)
   arch/x86/net/bpf_jit.h:15:31: sparse: sparse: cast truncates bits from constant value (8c48348 becomes 8348)
   arch/x86/net/bpf_jit.h:13:24: sparse: sparse: cast truncates bits from constant value (e2ff becomes ff)
   arch/x86/net/bpf_jit.h:13:24: sparse: sparse: cast truncates bits from constant value (8f0f becomes f)

vim +13 arch/x86/net/bpf_jit.h

     9	
    10	static inline u8 *emit_code(u8 *ptr, u32 bytes, unsigned int len)
    11	{
    12		if (len == 1)
  > 13			*ptr = bytes;
    14		else if (len == 2)
    15			*(u16 *)ptr = bytes;
    16		else {
    17			*(u32 *)ptr = bytes;
    18			barrier();
    19		}
    20		return ptr + len;
    21	}
    22	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 34446 bytes --]

  parent reply	other threads:[~2020-07-11  3:48 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-29  9:33 [PATCH bpf-next 0/2] Factor common x86 JIT code Tobias Klauser
2020-06-29  9:33 ` [PATCH bpf-next 1/2] bpf, x86: " Tobias Klauser
2020-06-29 17:48   ` Alexei Starovoitov
2020-06-30  5:20   ` kernel test robot
2020-07-11  3:13   ` kernel test robot [this message]
2020-06-29  9:33 ` [PATCH bpf-next 2/2] bpf, x86: Factor out get_cond_jmp_opcode and use for 64bit x86 Tobias Klauser

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=202007111131.VDVUrWTd%lkp@intel.com \
    --to=lkp@intel.com \
    --cc=ast@kernel.org \
    --cc=bpf@vger.kernel.org \
    --cc=daniel@iogearbox.net \
    --cc=kbuild-all@lists.01.org \
    --cc=netdev@vger.kernel.org \
    --cc=tklauser@distanz.ch \
    --cc=udknight@gmail.com \
    --cc=x86@kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).