From: kbuild test robot <lkp@intel.com>
To: mikelley@exchange.microsoft.com
Cc: kbuild-all@01.org, gregkh@linuxfoundation.org,
linux-kernel@vger.kernel.org, devel@linuxdriverproject.org,
olaf@aepfle.de, apw@canonical.com, vkuznets@redhat.com,
jasowang@redhat.com, leann.ogasawara@canonical.com,
marcelo.cerri@canonical.com, sthemmin@microsoft.com,
kys@microsoft.com, Michael Kelley <mikelley@microsoft.com>
Subject: Re: [PATCH char-misc 1/1] Drivers: hv: vmbus: Implement Direct Mode for stimer0
Date: Sat, 4 Nov 2017 06:55:06 +0800 [thread overview]
Message-ID: <201711040621.zEbP0MVH%fengguang.wu@intel.com> (raw)
In-Reply-To: <20171031221849.12117-1-mikelley@exchange.microsoft.com>
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Hi Michael,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on char-misc/master]
url: https://github.com/0day-ci/linux/commits/mikelley-exchange-microsoft-com/Drivers-hv-vmbus-Implement-Direct-Mode-for-stimer0/20171103-214519
config: x86_64-randconfig-h0-11040619 (attached as .config)
compiler: gcc-4.9 (Debian 4.9.4-2) 4.9.4
reproduce:
# save the attached .config to linux build tree
make ARCH=x86_64
All warnings (new ones prefixed by >>):
In file included from include/linux/kasan.h:16:0,
from include/linux/slab.h:120,
from include/linux/irq.h:25,
from arch/x86/include/asm/mshyperv.h:7,
from arch/x86/entry/vdso/vdso32/../vclock_gettime.c:20,
from arch/x86/entry/vdso/vdso32/vclock_gettime.c:32:
arch/x86/include/asm/pgtable.h: In function 'pte_flags_pkey':
>> arch/x86/include/asm/pgtable.h:1199:2: warning: left shift count >= width of type
return (pte_flags & _PAGE_PKEY_MASK) >> _PAGE_BIT_PKEY_BIT0;
^
>> arch/x86/include/asm/pgtable.h:1199:2: warning: left shift count >= width of type
>> arch/x86/include/asm/pgtable.h:1199:2: warning: left shift count >= width of type
>> arch/x86/include/asm/pgtable.h:1199:2: warning: left shift count >= width of type
arch/x86/include/asm/pgtable.h:1199:2: warning: right shift count >= width of type
vim +1199 arch/x86/include/asm/pgtable.h
33a709b2 Dave Hansen 2016-02-12 1194
33a709b2 Dave Hansen 2016-02-12 1195 static inline u16 pte_flags_pkey(unsigned long pte_flags)
33a709b2 Dave Hansen 2016-02-12 1196 {
33a709b2 Dave Hansen 2016-02-12 1197 #ifdef CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS
33a709b2 Dave Hansen 2016-02-12 1198 /* ifdef to avoid doing 59-bit shift on 32-bit values */
33a709b2 Dave Hansen 2016-02-12 @1199 return (pte_flags & _PAGE_PKEY_MASK) >> _PAGE_BIT_PKEY_BIT0;
33a709b2 Dave Hansen 2016-02-12 1200 #else
33a709b2 Dave Hansen 2016-02-12 1201 return 0;
33a709b2 Dave Hansen 2016-02-12 1202 #endif
33a709b2 Dave Hansen 2016-02-12 1203 }
33a709b2 Dave Hansen 2016-02-12 1204
:::::: The code at line 1199 was first introduced by commit
:::::: 33a709b25a760b91184bb335cf7d7c32b8123013 mm/gup, x86/mm/pkeys: Check VMAs and PTEs for protection keys
:::::: TO: Dave Hansen <dave.hansen@linux.intel.com>
:::::: CC: Ingo Molnar <mingo@kernel.org>
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
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prev parent reply other threads:[~2017-11-03 22:55 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-31 22:18 [PATCH char-misc 1/1] Drivers: hv: vmbus: Implement Direct Mode for stimer0 mikelley
2017-11-01 12:00 ` Vitaly Kuznetsov
2017-11-01 13:41 ` Vitaly Kuznetsov
2017-11-30 18:08 ` Michael Kelley (EOSG)
2017-11-01 14:51 ` Thomas Gleixner
2017-11-01 16:19 ` Thomas Gleixner
2017-11-01 16:21 ` Michael Kelley (EOSG)
2017-11-30 18:08 ` Michael Kelley (EOSG)
2017-11-03 16:01 ` kbuild test robot
2017-11-03 22:55 ` kbuild test robot [this message]
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