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* arch/powerpc/platforms/powernv/eeh-powernv.c:1454:12: error: stack frame size of 3024 bytes in function 'pnv_eeh_next_error'
@ 2021-05-03  3:27 kernel test robot
  0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2021-05-03  3:27 UTC (permalink / raw)
  To: Oliver O'Halloran
  Cc: kbuild-all, clang-built-linux, linux-kernel, Michael Ellerman,
	Joel Stanley

[-- Attachment #1: Type: text/plain, Size: 18217 bytes --]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   9ccce092fc64d19504fa54de4fd659e279cc92e7
commit: 3b70464aa78917e88c1d4bfc2100c344c0eda8e0 powerpc/powernv: Staticify functions without prototypes
date:   8 months ago
config: powerpc64-randconfig-r026-20210430 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 8f5a2a5836cc8e4c1def2bdeb022e7b496623439)
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 powerpc64 cross compiling tool for clang build
        # apt-get install binutils-powerpc64-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3b70464aa78917e88c1d4bfc2100c344c0eda8e0
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 3b70464aa78917e88c1d4bfc2100c344c0eda8e0
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=powerpc64 

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

All errors (new ones prefixed by >>):

>> arch/powerpc/platforms/powernv/eeh-powernv.c:1454:12: error: stack frame size of 3024 bytes in function 'pnv_eeh_next_error' [-Werror,-Wframe-larger-than=]
   static int pnv_eeh_next_error(struct eeh_pe **pe)
              ^
   1 error generated.


vim +/pnv_eeh_next_error +1454 arch/powerpc/platforms/powernv/eeh-powernv.c

2a485ad7c88ddf Gavin Shan      2015-02-16  1443  
29310e5e860697 Gavin Shan      2013-06-20  1444  /**
01f3bfb7804ae2 Gavin Shan      2015-02-16  1445   * pnv_eeh_next_error - Retrieve next EEH error to handle
29310e5e860697 Gavin Shan      2013-06-20  1446   * @pe: Affected PE
29310e5e860697 Gavin Shan      2013-06-20  1447   *
2a485ad7c88ddf Gavin Shan      2015-02-16  1448   * The function is expected to be called by EEH core while it gets
2a485ad7c88ddf Gavin Shan      2015-02-16  1449   * special EEH event (without binding PE). The function calls to
2a485ad7c88ddf Gavin Shan      2015-02-16  1450   * OPAL APIs for next error to handle. The informational error is
2a485ad7c88ddf Gavin Shan      2015-02-16  1451   * handled internally by platform. However, the dead IOC, dead PHB,
2a485ad7c88ddf Gavin Shan      2015-02-16  1452   * fenced PHB and frozen PE should be handled by EEH core eventually.
29310e5e860697 Gavin Shan      2013-06-20  1453   */
01f3bfb7804ae2 Gavin Shan      2015-02-16 @1454  static int pnv_eeh_next_error(struct eeh_pe **pe)
29310e5e860697 Gavin Shan      2013-06-20  1455  {
29310e5e860697 Gavin Shan      2013-06-20  1456  	struct pci_controller *hose;
2a485ad7c88ddf Gavin Shan      2015-02-16  1457  	struct pnv_phb *phb;
2a485ad7c88ddf Gavin Shan      2015-02-16  1458  	struct eeh_pe *phb_pe, *parent_pe;
2a485ad7c88ddf Gavin Shan      2015-02-16  1459  	__be64 frozen_pe_no;
2a485ad7c88ddf Gavin Shan      2015-02-16  1460  	__be16 err_type, severity;
2a485ad7c88ddf Gavin Shan      2015-02-16  1461  	long rc;
2a485ad7c88ddf Gavin Shan      2015-02-16  1462  	int state, ret = EEH_NEXT_ERR_NONE;
2a485ad7c88ddf Gavin Shan      2015-02-16  1463  
2a485ad7c88ddf Gavin Shan      2015-02-16  1464  	/*
79231448c929cc Alistair Popple 2015-05-15  1465  	 * While running here, it's safe to purge the event queue. The
79231448c929cc Alistair Popple 2015-05-15  1466  	 * event should still be masked.
2a485ad7c88ddf Gavin Shan      2015-02-16  1467  	 */
2a485ad7c88ddf Gavin Shan      2015-02-16  1468  	eeh_remove_event(NULL, false);
29310e5e860697 Gavin Shan      2013-06-20  1469  
29310e5e860697 Gavin Shan      2013-06-20  1470  	list_for_each_entry(hose, &hose_list, list_node) {
2a485ad7c88ddf Gavin Shan      2015-02-16  1471  		/*
2a485ad7c88ddf Gavin Shan      2015-02-16  1472  		 * If the subordinate PCI buses of the PHB has been
2a485ad7c88ddf Gavin Shan      2015-02-16  1473  		 * removed or is exactly under error recovery, we
2a485ad7c88ddf Gavin Shan      2015-02-16  1474  		 * needn't take care of it any more.
2a485ad7c88ddf Gavin Shan      2015-02-16  1475  		 */
29310e5e860697 Gavin Shan      2013-06-20  1476  		phb = hose->private_data;
2a485ad7c88ddf Gavin Shan      2015-02-16  1477  		phb_pe = eeh_phb_pe_get(hose);
2a485ad7c88ddf Gavin Shan      2015-02-16  1478  		if (!phb_pe || (phb_pe->state & EEH_PE_ISOLATED))
2a485ad7c88ddf Gavin Shan      2015-02-16  1479  			continue;
2a485ad7c88ddf Gavin Shan      2015-02-16  1480  
2a485ad7c88ddf Gavin Shan      2015-02-16  1481  		rc = opal_pci_next_error(phb->opal_id,
2a485ad7c88ddf Gavin Shan      2015-02-16  1482  					 &frozen_pe_no, &err_type, &severity);
2a485ad7c88ddf Gavin Shan      2015-02-16  1483  		if (rc != OPAL_SUCCESS) {
2a485ad7c88ddf Gavin Shan      2015-02-16  1484  			pr_devel("%s: Invalid return value on "
2a485ad7c88ddf Gavin Shan      2015-02-16  1485  				 "PHB#%x (0x%lx) from opal_pci_next_error",
2a485ad7c88ddf Gavin Shan      2015-02-16  1486  				 __func__, hose->global_number, rc);
2a485ad7c88ddf Gavin Shan      2015-02-16  1487  			continue;
2a485ad7c88ddf Gavin Shan      2015-02-16  1488  		}
2a485ad7c88ddf Gavin Shan      2015-02-16  1489  
2a485ad7c88ddf Gavin Shan      2015-02-16  1490  		/* If the PHB doesn't have error, stop processing */
2a485ad7c88ddf Gavin Shan      2015-02-16  1491  		if (be16_to_cpu(err_type) == OPAL_EEH_NO_ERROR ||
2a485ad7c88ddf Gavin Shan      2015-02-16  1492  		    be16_to_cpu(severity) == OPAL_EEH_SEV_NO_ERROR) {
2a485ad7c88ddf Gavin Shan      2015-02-16  1493  			pr_devel("%s: No error found on PHB#%x\n",
2a485ad7c88ddf Gavin Shan      2015-02-16  1494  				 __func__, hose->global_number);
2a485ad7c88ddf Gavin Shan      2015-02-16  1495  			continue;
2a485ad7c88ddf Gavin Shan      2015-02-16  1496  		}
2a485ad7c88ddf Gavin Shan      2015-02-16  1497  
2a485ad7c88ddf Gavin Shan      2015-02-16  1498  		/*
2a485ad7c88ddf Gavin Shan      2015-02-16  1499  		 * Processing the error. We're expecting the error with
2a485ad7c88ddf Gavin Shan      2015-02-16  1500  		 * highest priority reported upon multiple errors on the
2a485ad7c88ddf Gavin Shan      2015-02-16  1501  		 * specific PHB.
2a485ad7c88ddf Gavin Shan      2015-02-16  1502  		 */
2a485ad7c88ddf Gavin Shan      2015-02-16  1503  		pr_devel("%s: Error (%d, %d, %llu) on PHB#%x\n",
2a485ad7c88ddf Gavin Shan      2015-02-16  1504  			__func__, be16_to_cpu(err_type),
2a485ad7c88ddf Gavin Shan      2015-02-16  1505  			be16_to_cpu(severity), be64_to_cpu(frozen_pe_no),
2a485ad7c88ddf Gavin Shan      2015-02-16  1506  			hose->global_number);
2a485ad7c88ddf Gavin Shan      2015-02-16  1507  		switch (be16_to_cpu(err_type)) {
2a485ad7c88ddf Gavin Shan      2015-02-16  1508  		case OPAL_EEH_IOC_ERROR:
2a485ad7c88ddf Gavin Shan      2015-02-16  1509  			if (be16_to_cpu(severity) == OPAL_EEH_SEV_IOC_DEAD) {
2a485ad7c88ddf Gavin Shan      2015-02-16  1510  				pr_err("EEH: dead IOC detected\n");
2a485ad7c88ddf Gavin Shan      2015-02-16  1511  				ret = EEH_NEXT_ERR_DEAD_IOC;
2a485ad7c88ddf Gavin Shan      2015-02-16  1512  			} else if (be16_to_cpu(severity) == OPAL_EEH_SEV_INF) {
2a485ad7c88ddf Gavin Shan      2015-02-16  1513  				pr_info("EEH: IOC informative error "
2a485ad7c88ddf Gavin Shan      2015-02-16  1514  					"detected\n");
2a485ad7c88ddf Gavin Shan      2015-02-16  1515  				pnv_eeh_get_and_dump_hub_diag(hose);
2a485ad7c88ddf Gavin Shan      2015-02-16  1516  				ret = EEH_NEXT_ERR_NONE;
2a485ad7c88ddf Gavin Shan      2015-02-16  1517  			}
2a485ad7c88ddf Gavin Shan      2015-02-16  1518  
29310e5e860697 Gavin Shan      2013-06-20  1519  			break;
2a485ad7c88ddf Gavin Shan      2015-02-16  1520  		case OPAL_EEH_PHB_ERROR:
2a485ad7c88ddf Gavin Shan      2015-02-16  1521  			if (be16_to_cpu(severity) == OPAL_EEH_SEV_PHB_DEAD) {
2a485ad7c88ddf Gavin Shan      2015-02-16  1522  				*pe = phb_pe;
2a485ad7c88ddf Gavin Shan      2015-02-16  1523  				pr_err("EEH: dead PHB#%x detected, "
2a485ad7c88ddf Gavin Shan      2015-02-16  1524  				       "location: %s\n",
2a485ad7c88ddf Gavin Shan      2015-02-16  1525  					hose->global_number,
2a485ad7c88ddf Gavin Shan      2015-02-16  1526  					eeh_pe_loc_get(phb_pe));
2a485ad7c88ddf Gavin Shan      2015-02-16  1527  				ret = EEH_NEXT_ERR_DEAD_PHB;
2a485ad7c88ddf Gavin Shan      2015-02-16  1528  			} else if (be16_to_cpu(severity) ==
2a485ad7c88ddf Gavin Shan      2015-02-16  1529  				   OPAL_EEH_SEV_PHB_FENCED) {
2a485ad7c88ddf Gavin Shan      2015-02-16  1530  				*pe = phb_pe;
2a485ad7c88ddf Gavin Shan      2015-02-16  1531  				pr_err("EEH: Fenced PHB#%x detected, "
2a485ad7c88ddf Gavin Shan      2015-02-16  1532  				       "location: %s\n",
2a485ad7c88ddf Gavin Shan      2015-02-16  1533  					hose->global_number,
2a485ad7c88ddf Gavin Shan      2015-02-16  1534  					eeh_pe_loc_get(phb_pe));
2a485ad7c88ddf Gavin Shan      2015-02-16  1535  				ret = EEH_NEXT_ERR_FENCED_PHB;
2a485ad7c88ddf Gavin Shan      2015-02-16  1536  			} else if (be16_to_cpu(severity) == OPAL_EEH_SEV_INF) {
2a485ad7c88ddf Gavin Shan      2015-02-16  1537  				pr_info("EEH: PHB#%x informative error "
2a485ad7c88ddf Gavin Shan      2015-02-16  1538  					"detected, location: %s\n",
2a485ad7c88ddf Gavin Shan      2015-02-16  1539  					hose->global_number,
2a485ad7c88ddf Gavin Shan      2015-02-16  1540  					eeh_pe_loc_get(phb_pe));
2a485ad7c88ddf Gavin Shan      2015-02-16  1541  				pnv_eeh_get_phb_diag(phb_pe);
2a485ad7c88ddf Gavin Shan      2015-02-16  1542  				pnv_pci_dump_phb_diag_data(hose, phb_pe->data);
2a485ad7c88ddf Gavin Shan      2015-02-16  1543  				ret = EEH_NEXT_ERR_NONE;
29310e5e860697 Gavin Shan      2013-06-20  1544  			}
29310e5e860697 Gavin Shan      2013-06-20  1545  
2a485ad7c88ddf Gavin Shan      2015-02-16  1546  			break;
2a485ad7c88ddf Gavin Shan      2015-02-16  1547  		case OPAL_EEH_PE_ERROR:
2a485ad7c88ddf Gavin Shan      2015-02-16  1548  			/*
2a485ad7c88ddf Gavin Shan      2015-02-16  1549  			 * If we can't find the corresponding PE, we
2a485ad7c88ddf Gavin Shan      2015-02-16  1550  			 * just try to unfreeze.
2a485ad7c88ddf Gavin Shan      2015-02-16  1551  			 */
2a485ad7c88ddf Gavin Shan      2015-02-16  1552  			if (pnv_eeh_get_pe(hose,
2a485ad7c88ddf Gavin Shan      2015-02-16  1553  				be64_to_cpu(frozen_pe_no), pe)) {
2a485ad7c88ddf Gavin Shan      2015-02-16  1554  				pr_info("EEH: Clear non-existing PHB#%x-PE#%llx\n",
0f36db77643b6f Gavin Shan      2015-05-12  1555  					hose->global_number, be64_to_cpu(frozen_pe_no));
2a485ad7c88ddf Gavin Shan      2015-02-16  1556  				pr_info("EEH: PHB location: %s\n",
2a485ad7c88ddf Gavin Shan      2015-02-16  1557  					eeh_pe_loc_get(phb_pe));
79cd95200035fb Gavin Shan      2015-05-12  1558  
79cd95200035fb Gavin Shan      2015-05-12  1559  				/* Dump PHB diag-data */
79cd95200035fb Gavin Shan      2015-05-12  1560  				rc = opal_pci_get_phb_diag_data2(phb->opal_id,
5cb1f8fdddb747 Russell Currey  2017-06-14  1561  					phb->diag_data, phb->diag_data_size);
79cd95200035fb Gavin Shan      2015-05-12  1562  				if (rc == OPAL_SUCCESS)
79cd95200035fb Gavin Shan      2015-05-12  1563  					pnv_pci_dump_phb_diag_data(hose,
5cb1f8fdddb747 Russell Currey  2017-06-14  1564  							phb->diag_data);
79cd95200035fb Gavin Shan      2015-05-12  1565  
79cd95200035fb Gavin Shan      2015-05-12  1566  				/* Try best to clear it */
2a485ad7c88ddf Gavin Shan      2015-02-16  1567  				opal_pci_eeh_freeze_clear(phb->opal_id,
d63e51b31e0b65 Gavin Shan      2016-08-02  1568  					be64_to_cpu(frozen_pe_no),
2a485ad7c88ddf Gavin Shan      2015-02-16  1569  					OPAL_EEH_ACTION_CLEAR_FREEZE_ALL);
2a485ad7c88ddf Gavin Shan      2015-02-16  1570  				ret = EEH_NEXT_ERR_NONE;
2a485ad7c88ddf Gavin Shan      2015-02-16  1571  			} else if ((*pe)->state & EEH_PE_ISOLATED ||
2a485ad7c88ddf Gavin Shan      2015-02-16  1572  				   eeh_pe_passed(*pe)) {
2a485ad7c88ddf Gavin Shan      2015-02-16  1573  				ret = EEH_NEXT_ERR_NONE;
2a485ad7c88ddf Gavin Shan      2015-02-16  1574  			} else {
2a485ad7c88ddf Gavin Shan      2015-02-16  1575  				pr_err("EEH: Frozen PE#%x "
2a485ad7c88ddf Gavin Shan      2015-02-16  1576  				       "on PHB#%x detected\n",
2a485ad7c88ddf Gavin Shan      2015-02-16  1577  				       (*pe)->addr,
2a485ad7c88ddf Gavin Shan      2015-02-16  1578  					(*pe)->phb->global_number);
2a485ad7c88ddf Gavin Shan      2015-02-16  1579  				pr_err("EEH: PE location: %s, "
2a485ad7c88ddf Gavin Shan      2015-02-16  1580  				       "PHB location: %s\n",
2a485ad7c88ddf Gavin Shan      2015-02-16  1581  				       eeh_pe_loc_get(*pe),
2a485ad7c88ddf Gavin Shan      2015-02-16  1582  				       eeh_pe_loc_get(phb_pe));
2a485ad7c88ddf Gavin Shan      2015-02-16  1583  				ret = EEH_NEXT_ERR_FROZEN_PE;
2a485ad7c88ddf Gavin Shan      2015-02-16  1584  			}
29310e5e860697 Gavin Shan      2013-06-20  1585  
2a485ad7c88ddf Gavin Shan      2015-02-16  1586  			break;
2a485ad7c88ddf Gavin Shan      2015-02-16  1587  		default:
2a485ad7c88ddf Gavin Shan      2015-02-16  1588  			pr_warn("%s: Unexpected error type %d\n",
2a485ad7c88ddf Gavin Shan      2015-02-16  1589  				__func__, be16_to_cpu(err_type));
2a485ad7c88ddf Gavin Shan      2015-02-16  1590  		}
2a485ad7c88ddf Gavin Shan      2015-02-16  1591  
2a485ad7c88ddf Gavin Shan      2015-02-16  1592  		/*
2a485ad7c88ddf Gavin Shan      2015-02-16  1593  		 * EEH core will try recover from fenced PHB or
2a485ad7c88ddf Gavin Shan      2015-02-16  1594  		 * frozen PE. In the time for frozen PE, EEH core
2a485ad7c88ddf Gavin Shan      2015-02-16  1595  		 * enable IO path for that before collecting logs,
2a485ad7c88ddf Gavin Shan      2015-02-16  1596  		 * but it ruins the site. So we have to dump the
2a485ad7c88ddf Gavin Shan      2015-02-16  1597  		 * log in advance here.
2a485ad7c88ddf Gavin Shan      2015-02-16  1598  		 */
2a485ad7c88ddf Gavin Shan      2015-02-16  1599  		if ((ret == EEH_NEXT_ERR_FROZEN_PE  ||
2a485ad7c88ddf Gavin Shan      2015-02-16  1600  		    ret == EEH_NEXT_ERR_FENCED_PHB) &&
2a485ad7c88ddf Gavin Shan      2015-02-16  1601  		    !((*pe)->state & EEH_PE_ISOLATED)) {
e762bb891a294a Sam Bobroff     2018-09-12  1602  			eeh_pe_mark_isolated(*pe);
2a485ad7c88ddf Gavin Shan      2015-02-16  1603  			pnv_eeh_get_phb_diag(*pe);
2a485ad7c88ddf Gavin Shan      2015-02-16  1604  
2a485ad7c88ddf Gavin Shan      2015-02-16  1605  			if (eeh_has_flag(EEH_EARLY_DUMP_LOG))
2a485ad7c88ddf Gavin Shan      2015-02-16  1606  				pnv_pci_dump_phb_diag_data((*pe)->phb,
2a485ad7c88ddf Gavin Shan      2015-02-16  1607  							   (*pe)->data);
2a485ad7c88ddf Gavin Shan      2015-02-16  1608  		}
2a485ad7c88ddf Gavin Shan      2015-02-16  1609  
2a485ad7c88ddf Gavin Shan      2015-02-16  1610  		/*
2a485ad7c88ddf Gavin Shan      2015-02-16  1611  		 * We probably have the frozen parent PE out there and
2a485ad7c88ddf Gavin Shan      2015-02-16  1612  		 * we need have to handle frozen parent PE firstly.
2a485ad7c88ddf Gavin Shan      2015-02-16  1613  		 */
2a485ad7c88ddf Gavin Shan      2015-02-16  1614  		if (ret == EEH_NEXT_ERR_FROZEN_PE) {
2a485ad7c88ddf Gavin Shan      2015-02-16  1615  			parent_pe = (*pe)->parent;
2a485ad7c88ddf Gavin Shan      2015-02-16  1616  			while (parent_pe) {
2a485ad7c88ddf Gavin Shan      2015-02-16  1617  				/* Hit the ceiling ? */
2a485ad7c88ddf Gavin Shan      2015-02-16  1618  				if (parent_pe->type & EEH_PE_PHB)
2a485ad7c88ddf Gavin Shan      2015-02-16  1619  					break;
2a485ad7c88ddf Gavin Shan      2015-02-16  1620  
2a485ad7c88ddf Gavin Shan      2015-02-16  1621  				/* Frozen parent PE ? */
2a485ad7c88ddf Gavin Shan      2015-02-16  1622  				state = eeh_ops->get_state(parent_pe, NULL);
34a286a4ac576d Sam Bobroff     2018-03-19  1623  				if (state > 0 && !eeh_state_active(state))
2a485ad7c88ddf Gavin Shan      2015-02-16  1624  					*pe = parent_pe;
2a485ad7c88ddf Gavin Shan      2015-02-16  1625  
2a485ad7c88ddf Gavin Shan      2015-02-16  1626  				/* Next parent level */
2a485ad7c88ddf Gavin Shan      2015-02-16  1627  				parent_pe = parent_pe->parent;
2a485ad7c88ddf Gavin Shan      2015-02-16  1628  			}
2a485ad7c88ddf Gavin Shan      2015-02-16  1629  
2a485ad7c88ddf Gavin Shan      2015-02-16  1630  			/* We possibly migrate to another PE */
e762bb891a294a Sam Bobroff     2018-09-12  1631  			eeh_pe_mark_isolated(*pe);
2a485ad7c88ddf Gavin Shan      2015-02-16  1632  		}
2a485ad7c88ddf Gavin Shan      2015-02-16  1633  
2a485ad7c88ddf Gavin Shan      2015-02-16  1634  		/*
2a485ad7c88ddf Gavin Shan      2015-02-16  1635  		 * If we have no errors on the specific PHB or only
2a485ad7c88ddf Gavin Shan      2015-02-16  1636  		 * informative error there, we continue poking it.
2a485ad7c88ddf Gavin Shan      2015-02-16  1637  		 * Otherwise, we need actions to be taken by upper
2a485ad7c88ddf Gavin Shan      2015-02-16  1638  		 * layer.
2a485ad7c88ddf Gavin Shan      2015-02-16  1639  		 */
2a485ad7c88ddf Gavin Shan      2015-02-16  1640  		if (ret > EEH_NEXT_ERR_INF)
2a485ad7c88ddf Gavin Shan      2015-02-16  1641  			break;
2a485ad7c88ddf Gavin Shan      2015-02-16  1642  	}
2a485ad7c88ddf Gavin Shan      2015-02-16  1643  
79231448c929cc Alistair Popple 2015-05-15  1644  	/* Unmask the event */
b8d65e9662b1ff Alistair Popple 2015-07-30  1645  	if (ret == EEH_NEXT_ERR_NONE && eeh_enabled())
79231448c929cc Alistair Popple 2015-05-15  1646  		enable_irq(eeh_event_irq);
79231448c929cc Alistair Popple 2015-05-15  1647  
2a485ad7c88ddf Gavin Shan      2015-02-16  1648  	return ret;
29310e5e860697 Gavin Shan      2013-06-20  1649  }
29310e5e860697 Gavin Shan      2013-06-20  1650  

:::::: The code at line 1454 was first introduced by commit
:::::: 01f3bfb7804ae20aaf66884cf537f7dc2cdc1671 powerpc/powernv: Shorten EEH function names

:::::: TO: Gavin Shan <gwshan@linux.vnet.ibm.com>
:::::: CC: Benjamin Herrenschmidt <benh@kernel.crashing.org>

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

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2021-05-03  3:27 arch/powerpc/platforms/powernv/eeh-powernv.c:1454:12: error: stack frame size of 3024 bytes in function 'pnv_eeh_next_error' kernel test robot

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