Le 10/01/2021 à 23:16, kernel test robot a écrit :
Hi Christophe,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 
master
head:   0653161f0faca68b77b3f36fb4b4b9b8b07050e5
commit: 03fd42d458fb9cb69e712600bd69ff77ff3a45a8 powerpc/fixmap: Fix 
FIX_EARLY_DEBUG_BASE when page size is 256k

This problem has been existing for years (since b8e8efaa8639). The above mentionned commit only fixes another build failure, that's the reason why the reported problems appear only now


date:   7 months ago
config: powerpc64-randconfig-r034-20210111 (attached as .config)
compiler: powerpc-linux-gcc (GCC) 9.3.0
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
         # 
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=03fd42d458fb9cb69e712600bd69ff77ff3a45a8
         git remote add linus 
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
         git fetch --no-tags linus master
         git checkout 03fd42d458fb9cb69e712600bd69ff77ff3a45a8
         # save the attached .config to linux build tree
         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross 
ARCH=powerpc64

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <[email protected]>

All error/warnings (new ones prefixed by >>):

    fs/ntfs/mft.c: In function 'ntfs_sync_mft_mirror':
fs/ntfs/mft.c:627:1: warning: the frame size of 2096 bytes is larger than 1024 
bytes [-Wframe-larger-than=]
      627 | }
          | ^
    fs/ntfs/mft.c: In function 'write_mft_record_nolock':
    fs/ntfs/mft.c:839:1: warning: the frame size of 2096 bytes is larger than 
1024 bytes [-Wframe-larger-than=]
      839 | }
          | ^
--
    fs/buffer.c: In function 'block_read_full_page':
fs/buffer.c:2343:1: warning: the frame size of 2064 bytes is larger than 1024 
bytes [-Wframe-larger-than=]
     2343 | }
          | ^
--
    arch/powerpc/kernel/head_44x.S: Assembler messages:
arch/powerpc/kernel/head_44x.S:601: Error: invalid operands (*ABS* and *UND* 
sections) for `|'
    arch/powerpc/kernel/head_44x.S:684: Error: invalid operands (*ABS* and 
*UND* sections) for `|'
--
    fs/ext4/move_extent.c: In function 'mext_page_mkuptodate':
fs/ext4/move_extent.c:227:1: warning: the frame size of 2048 bytes is larger 
than 1024 bytes [-Wframe-larger-than=]
      227 | }
          | ^
--
    fs/fat/dir.c: In function 'fat_add_new_entries':
fs/fat/dir.c:1279:1: warning: the frame size of 2112 bytes is larger than 1024 
bytes [-Wframe-larger-than=]
     1279 | }
          | ^
    fs/fat/dir.c: In function 'fat_alloc_new_dir':
    fs/fat/dir.c:1195:1: warning: the frame size of 2064 bytes is larger than 
1024 bytes [-Wframe-larger-than=]
     1195 | }
          | ^
--
    fs/fat/fatent.c: In function 'fat_free_clusters':
fs/fat/fatent.c:632:1: warning: the frame size of 2080 bytes is larger than 
1024 bytes [-Wframe-larger-than=]
      632 | }
          | ^
    fs/fat/fatent.c: In function 'fat_alloc_clusters':
    fs/fat/fatent.c:550:1: warning: the frame size of 2136 bytes is larger than 
1024 bytes [-Wframe-larger-than=]
      550 | }
          | ^
--
    fs/exfat/fatent.c: In function 'exfat_zeroed_cluster':
fs/exfat/fatent.c:311:1: warning: the frame size of 2064 bytes is larger than 
1024 bytes [-Wframe-larger-than=]
      311 | }
          | ^
--
    drivers/media/common/saa7146/saa7146_hlp.c: In function 
'calculate_clipping_registers_rect.isra.0':
drivers/media/common/saa7146/saa7146_hlp.c:465:1: warning: the frame size of 
1168 bytes is larger than 1024 bytes [-Wframe-larger-than=]
      465 | }
          | ^

Kconfig warnings: (for reference only)
    WARNING: unmet direct dependencies detected for NETDEVICES
    Depends on NET
    Selected by
    - AKEBONO && PPC_47x
    WARNING: unmet direct dependencies detected for ETHERNET
    Depends on NETDEVICES && NET
    Selected by
    - AKEBONO && PPC_47x
    WARNING: unmet direct dependencies detected for NET_DEVLINK
    Depends on NET
    Selected by
    - BNXT && NETDEVICES && ETHERNET && NET_VENDOR_BROADCOM && PCI
    - NFP && NETDEVICES && ETHERNET && NET_VENDOR_NETRONOME && PCI && PCI_MSI && (VXLAN || 
VXLAN && (TLS && TLS_DEVICE || !TLS_DEVICE
    WARNING: unmet direct dependencies detected for FAILOVER
    Depends on NET
    Selected by
    - NET_FAILOVER && NETDEVICES
    WARNING: unmet direct dependencies detected for PAGE_POOL
    Depends on NET
    Selected by
    - BNXT && NETDEVICES && ETHERNET && NET_VENDOR_BROADCOM && PCI


vim +601 arch/powerpc/kernel/head_44x.S

e7f75ad01d590243 Dave Kleikamp 2010-03-05  577
e7f75ad01d590243 Dave Kleikamp 2010-03-05  578          /* Mask of required 
permission bits. Note that while we
e7f75ad01d590243 Dave Kleikamp 2010-03-05  579           * do copy ESR:ST to 
_PAGE_RW position as trying to write
e7f75ad01d590243 Dave Kleikamp 2010-03-05  580           * to an RO page is 
pretty common, we don't do it with
e7f75ad01d590243 Dave Kleikamp 2010-03-05  581           * _PAGE_DIRTY. We 
could do it, but it's a fairly rare
e7f75ad01d590243 Dave Kleikamp 2010-03-05  582           * event so I'd rather 
take the overhead when it happens
e7f75ad01d590243 Dave Kleikamp 2010-03-05  583           * rather than adding 
an instruction here. We should measure
e7f75ad01d590243 Dave Kleikamp 2010-03-05  584           * whether the whole 
thing is worth it in the first place
e7f75ad01d590243 Dave Kleikamp 2010-03-05  585           * as we could avoid 
loading SPRN_ESR completely in the first
e7f75ad01d590243 Dave Kleikamp 2010-03-05  586           * place...
e7f75ad01d590243 Dave Kleikamp 2010-03-05  587           *
e7f75ad01d590243 Dave Kleikamp 2010-03-05  588           * TODO: Is it worth doing 
that mfspr & rlwimi in the first
e7f75ad01d590243 Dave Kleikamp 2010-03-05  589           *       place or can 
we save a couple of instructions here ?
e7f75ad01d590243 Dave Kleikamp 2010-03-05  590           */
e7f75ad01d590243 Dave Kleikamp 2010-03-05  591          mfspr   r12,SPRN_ESR
e7f75ad01d590243 Dave Kleikamp 2010-03-05  592          li      
r13,_PAGE_PRESENT|_PAGE_ACCESSED
e7f75ad01d590243 Dave Kleikamp 2010-03-05  593          rlwimi  r13,r12,10,30,30
e7f75ad01d590243 Dave Kleikamp 2010-03-05  594
e7f75ad01d590243 Dave Kleikamp 2010-03-05  595          /* Load the PTE */
e7f75ad01d590243 Dave Kleikamp 2010-03-05  596          /* Compute pgdir/pmd 
offset */
e7f75ad01d590243 Dave Kleikamp 2010-03-05  597          rlwinm  
r12,r10,PPC44x_PGD_OFF_SHIFT,PPC44x_PGD_OFF_MASK_BIT,29
e7f75ad01d590243 Dave Kleikamp 2010-03-05  598          lwzx    r11,r12,r11     
        /* Get pgd/pmd entry */
e7f75ad01d590243 Dave Kleikamp 2010-03-05  599
e7f75ad01d590243 Dave Kleikamp 2010-03-05  600          /* Word 0 is 
EPN,V,TS,DSIZ */
e7f75ad01d590243 Dave Kleikamp 2010-03-05 @601          li      
r12,PPC47x_TLB0_VALID | PPC47x_TLBE_SIZE
e7f75ad01d590243 Dave Kleikamp 2010-03-05  602          rlwimi  
r10,r12,0,32-PAGE_SHIFT,31      /* Insert valid and page size*/
e7f75ad01d590243 Dave Kleikamp 2010-03-05  603          li      r12,0
e7f75ad01d590243 Dave Kleikamp 2010-03-05  604          tlbwe   r10,r12,0
e7f75ad01d590243 Dave Kleikamp 2010-03-05  605
e7f75ad01d590243 Dave Kleikamp 2010-03-05  606          /* XXX can we do better 
? Need to make sure tlbwe has established
e7f75ad01d590243 Dave Kleikamp 2010-03-05  607           * latch V bit in 
MMUCR0 before the PTE is loaded further down */
e7f75ad01d590243 Dave Kleikamp 2010-03-05  608  #ifdef CONFIG_SMP
e7f75ad01d590243 Dave Kleikamp 2010-03-05  609          isync
e7f75ad01d590243 Dave Kleikamp 2010-03-05  610  #endif
e7f75ad01d590243 Dave Kleikamp 2010-03-05  611
e7f75ad01d590243 Dave Kleikamp 2010-03-05  612          rlwinm. r12,r11,0,0,20  
        /* Extract pt base address */
e7f75ad01d590243 Dave Kleikamp 2010-03-05  613          /* Compute pte address 
*/
e7f75ad01d590243 Dave Kleikamp 2010-03-05  614          rlwimi  
r12,r10,PPC44x_PTE_ADD_SHIFT,PPC44x_PTE_ADD_MASK_BIT,28
e7f75ad01d590243 Dave Kleikamp 2010-03-05  615          beq     2f              
        /* Bail if no table */
e7f75ad01d590243 Dave Kleikamp 2010-03-05  616          lwz     r11,0(r12)      
        /* Get high word of pte entry */
e7f75ad01d590243 Dave Kleikamp 2010-03-05  617
e7f75ad01d590243 Dave Kleikamp 2010-03-05  618          /* XXX can we do better 
? maybe insert a known 0 bit from r11 into the
e7f75ad01d590243 Dave Kleikamp 2010-03-05  619           * bottom of r12 to 
create a data dependency... We can also use r10
e7f75ad01d590243 Dave Kleikamp 2010-03-05  620           * as destination 
nowadays
e7f75ad01d590243 Dave Kleikamp 2010-03-05  621           */
e7f75ad01d590243 Dave Kleikamp 2010-03-05  622  #ifdef CONFIG_SMP
e7f75ad01d590243 Dave Kleikamp 2010-03-05  623          lwsync
e7f75ad01d590243 Dave Kleikamp 2010-03-05  624  #endif
e7f75ad01d590243 Dave Kleikamp 2010-03-05  625          lwz     r12,4(r12)      
        /* Get low word of pte entry */
e7f75ad01d590243 Dave Kleikamp 2010-03-05  626
e7f75ad01d590243 Dave Kleikamp 2010-03-05  627          andc.   r13,r13,r12     
        /* Check permission */
e7f75ad01d590243 Dave Kleikamp 2010-03-05  628
e7f75ad01d590243 Dave Kleikamp 2010-03-05  629           /* Jump to common tlb 
load */
e7f75ad01d590243 Dave Kleikamp 2010-03-05  630          beq     
finish_tlb_load_47x
e7f75ad01d590243 Dave Kleikamp 2010-03-05  631

:::::: The code at line 601 was first introduced by commit
:::::: e7f75ad01d590243904c2d95ab47e6b2e9ef6dad powerpc/47x: Base ppc476 support

:::::: TO: Dave Kleikamp <[email protected]>
:::::: CC: Josh Boyer <[email protected]>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/[email protected]

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