From: kbuild test robot <lkp@intel.com>
To: Vaibhav Jain <vaibhav@linux.ibm.com>
Cc: "Aneesh Kumar K . V" <aneesh.kumar@linux.ibm.com>,
Oliver O'Halloran <oohall@gmail.com>,
kbuild-all@01.org, Vaibhav Jain <vaibhav@linux.ibm.com>,
Laurent Dufour <ldufour@linux.vnet.ibm.com>,
linuxppc-dev@lists.ozlabs.org,
David Gibson <david@gibson.dropbear.id.au>
Subject: Re: [PATCH v2 2/3] powerpc/papr_scm: Update drc_pmem_unbind() to use H_SCM_UNBIND_ALL
Date: Wed, 26 Jun 2019 04:35:13 +0800 [thread overview]
Message-ID: <201906260437.hXXgAGdv%lkp@intel.com> (raw)
In-Reply-To: <20190625122709.11846-3-vaibhav@linux.ibm.com>
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Hi Vaibhav,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on powerpc/next]
[also build test WARNING on v5.2-rc6 next-20190625]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/Vaibhav-Jain/powerpc-papr_scm-Workaround-for-failure-of-drc-bind-after-kexec/20190626-034335
base: https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next
config: powerpc-allyesconfig (attached as .config)
compiler: powerpc64-linux-gcc (GCC) 7.4.0
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# save the attached .config to linux build tree
GCC_VERSION=7.4.0 make.cross ARCH=powerpc
If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@intel.com>
Note: it may well be a FALSE warning. FWIW you are at least aware of it now.
http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings
All warnings (new ones prefixed by >>):
arch/powerpc/platforms/pseries/papr_scm.c: In function 'drc_pmem_unbind.isra.2':
>> arch/powerpc/platforms/pseries/papr_scm.c:90:6: warning: 'token' may be used uninitialized in this function [-Wmaybe-uninitialized]
rc = plpar_hcall(H_SCM_UNBIND_ALL, ret, H_UNBIND_SCOPE_DRC,
~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
p->drc_index, token);
~~~~~~~~~~~~~~~~~~~~
vim +/token +90 arch/powerpc/platforms/pseries/papr_scm.c
77
78 static int drc_pmem_unbind(struct papr_scm_priv *p)
79 {
80 unsigned long ret[PLPAR_HCALL_BUFSIZE];
81 uint64_t token;
82 int64_t rc;
83
84 dev_dbg(&p->pdev->dev, "unbind drc %x\n", p->drc_index);
85
86 /* NB: unbind has the same retry requirements as drc_pmem_bind() */
87 do {
88
89 /* Unbind of all SCM resources associated with drcIndex */
> 90 rc = plpar_hcall(H_SCM_UNBIND_ALL, ret, H_UNBIND_SCOPE_DRC,
91 p->drc_index, token);
92 token = ret[0];
93
94 /* Check if we are stalled for some time */
95 if (H_IS_LONG_BUSY(rc)) {
96 msleep(get_longbusy_msecs(rc));
97 rc = H_BUSY;
98 } else if (rc == H_BUSY) {
99 cond_resched();
100 }
101
102 } while (rc == H_BUSY);
103
104 if (rc)
105 dev_err(&p->pdev->dev, "unbind error: %lld\n", rc);
106 else
107 dev_dbg(&p->pdev->dev, "unbind drc %x complete\n",
108 p->drc_index);
109
110 return rc == H_SUCCESS ? 0 : -ENXIO;
111 }
112
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
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next prev parent reply other threads:[~2019-06-25 20:38 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-25 12:27 [PATCH v2 0/3] powerpc/papr_scm: Workaround for failure of drc bind after kexec Vaibhav Jain
2019-06-25 12:27 ` [PATCH v2 1/3] powerpc/pseries: Update SCM hcall op-codes in hvcall.h Vaibhav Jain
2019-06-26 3:17 ` Oliver O'Halloran
2019-06-25 12:27 ` [PATCH v2 2/3] powerpc/papr_scm: Update drc_pmem_unbind() to use H_SCM_UNBIND_ALL Vaibhav Jain
2019-06-25 20:35 ` kbuild test robot [this message]
2019-06-26 3:47 ` Oliver O'Halloran
2019-06-25 12:27 ` [PATCH v2 3/3] powerpc/papr_scm: Force a scm-unbind if initial scm-bind fails Vaibhav Jain
2019-06-26 3:24 ` Oliver O'Halloran
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