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Subjectfs/f2fs/recovery.c:765:5: warning: stack frame size (2080) exceeds limit (2048) in function 'f2fs_recover_fsync_data'
tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 62fb9874f5da54fdb243003b386128037319b219
commit: 7ad08a58bf67594057362e45cbddd3e27e53e557 f2fs: Handle casefolding with Encryption
date: 7 months ago
config: powerpc64-randconfig-r034-20210628 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 59558129276098d62046c8cda92240d292cbfb1c)
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=7ad08a58bf67594057362e45cbddd3e27e53e557
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 7ad08a58bf67594057362e45cbddd3e27e53e557
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc64

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

All warnings (new ones prefixed by >>):

In file included from arch/powerpc/include/asm/hardirq.h:6:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
In file included from arch/powerpc/include/asm/io.h:604:
arch/powerpc/include/asm/io-defs.h:45:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
DEF_PCI_AC_NORET(insw, (unsigned long p, void *b, unsigned long c),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET'
__do_##name al; \
^~~~~~~~~~~~~~
<scratch space>:210:1: note: expanded from here
__do_insw
^
arch/powerpc/include/asm/io.h:542:56: note: expanded from macro '__do_insw'
#define __do_insw(p, b, n) readsw((PCI_IO_ADDR)_IO_BASE+(p), (b), (n))
~~~~~~~~~~~~~~~~~~~~~^
In file included from fs/f2fs/recovery.c:10:
In file included from include/linux/f2fs_fs.h:11:
In file included from include/linux/pagemap.h:11:
In file included from include/linux/highmem.h:10:
In file included from include/linux/hardirq.h:10:
In file included from arch/powerpc/include/asm/hardirq.h:6:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
In file included from arch/powerpc/include/asm/io.h:604:
arch/powerpc/include/asm/io-defs.h:47:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
DEF_PCI_AC_NORET(insl, (unsigned long p, void *b, unsigned long c),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET'
__do_##name al; \
^~~~~~~~~~~~~~
<scratch space>:214:1: note: expanded from here
__do_insl
^
arch/powerpc/include/asm/io.h:543:56: note: expanded from macro '__do_insl'
#define __do_insl(p, b, n) readsl((PCI_IO_ADDR)_IO_BASE+(p), (b), (n))
~~~~~~~~~~~~~~~~~~~~~^
In file included from fs/f2fs/recovery.c:10:
In file included from include/linux/f2fs_fs.h:11:
In file included from include/linux/pagemap.h:11:
In file included from include/linux/highmem.h:10:
In file included from include/linux/hardirq.h:10:
In file included from arch/powerpc/include/asm/hardirq.h:6:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
In file included from arch/powerpc/include/asm/io.h:604:
arch/powerpc/include/asm/io-defs.h:49:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
DEF_PCI_AC_NORET(outsb, (unsigned long p, const void *b, unsigned long c),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET'
__do_##name al; \
^~~~~~~~~~~~~~
<scratch space>:218:1: note: expanded from here
__do_outsb
^
arch/powerpc/include/asm/io.h:544:58: note: expanded from macro '__do_outsb'
#define __do_outsb(p, b, n) writesb((PCI_IO_ADDR)_IO_BASE+(p),(b),(n))
~~~~~~~~~~~~~~~~~~~~~^
In file included from fs/f2fs/recovery.c:10:
In file included from include/linux/f2fs_fs.h:11:
In file included from include/linux/pagemap.h:11:
In file included from include/linux/highmem.h:10:
In file included from include/linux/hardirq.h:10:
In file included from arch/powerpc/include/asm/hardirq.h:6:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
In file included from arch/powerpc/include/asm/io.h:604:
arch/powerpc/include/asm/io-defs.h:51:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
DEF_PCI_AC_NORET(outsw, (unsigned long p, const void *b, unsigned long c),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET'
__do_##name al; \
^~~~~~~~~~~~~~
<scratch space>:222:1: note: expanded from here
__do_outsw
^
arch/powerpc/include/asm/io.h:545:58: note: expanded from macro '__do_outsw'
#define __do_outsw(p, b, n) writesw((PCI_IO_ADDR)_IO_BASE+(p),(b),(n))
~~~~~~~~~~~~~~~~~~~~~^
In file included from fs/f2fs/recovery.c:10:
In file included from include/linux/f2fs_fs.h:11:
In file included from include/linux/pagemap.h:11:
In file included from include/linux/highmem.h:10:
In file included from include/linux/hardirq.h:10:
In file included from arch/powerpc/include/asm/hardirq.h:6:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
In file included from arch/powerpc/include/asm/io.h:604:
arch/powerpc/include/asm/io-defs.h:53:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
DEF_PCI_AC_NORET(outsl, (unsigned long p, const void *b, unsigned long c),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET'
__do_##name al; \
^~~~~~~~~~~~~~
<scratch space>:226:1: note: expanded from here
__do_outsl
^
arch/powerpc/include/asm/io.h:546:58: note: expanded from macro '__do_outsl'
#define __do_outsl(p, b, n) writesl((PCI_IO_ADDR)_IO_BASE+(p),(b),(n))
~~~~~~~~~~~~~~~~~~~~~^
>> fs/f2fs/recovery.c:765:5: warning: stack frame size (2080) exceeds limit (2048) in function 'f2fs_recover_fsync_data' [-Wframe-larger-than]
int f2fs_recover_fsync_data(struct f2fs_sb_info *sbi, bool check_only)
^
14 warnings generated.


vim +/f2fs_recover_fsync_data +765 fs/f2fs/recovery.c

d624c96fb3249e Jaegeuk Kim 2012-11-02 764
4d57b86dd86404 Chao Yu 2018-05-30 @765 int f2fs_recover_fsync_data(struct f2fs_sb_info *sbi, bool check_only)
d624c96fb3249e Jaegeuk Kim 2012-11-02 766 {
26b5a079197c8c Sheng Yong 2018-10-12 767 struct list_head inode_list, tmp_inode_list;
f61cce5b81f91b Chao Yu 2016-05-07 768 struct list_head dir_list;
6ead114232f786 Jaegeuk Kim 2013-03-20 769 int err;
6781eabba1bdb1 Jaegeuk Kim 2016-03-23 770 int ret = 0;
4b2414d04e9912 Chao Yu 2017-08-08 771 unsigned long s_flags = sbi->sb->s_flags;
aabe51364f4468 Haicheng Li 2013-10-23 772 bool need_writecp = false;
c426d99127b1ab Shin'ichiro Kawasaki 2019-12-09 773 bool fix_curseg_write_pointer = false;
ea6767337f8631 Jaegeuk Kim 2017-10-06 774 #ifdef CONFIG_QUOTA
ea6767337f8631 Jaegeuk Kim 2017-10-06 775 int quota_enabled;
ea6767337f8631 Jaegeuk Kim 2017-10-06 776 #endif
d624c96fb3249e Jaegeuk Kim 2012-11-02 777
1751e8a6cb935e Linus Torvalds 2017-11-27 778 if (s_flags & SB_RDONLY) {
dcbb4c10e6d969 Joe Perches 2019-06-18 779 f2fs_info(sbi, "recover fsync data on readonly fs");
1751e8a6cb935e Linus Torvalds 2017-11-27 780 sbi->sb->s_flags &= ~SB_RDONLY;
4b2414d04e9912 Chao Yu 2017-08-08 781 }
4b2414d04e9912 Chao Yu 2017-08-08 782

:::::: The code at line 765 was first introduced by commit
:::::: 4d57b86dd86404fd8bb4f87d277d5a86a7fe537e f2fs: clean up symbol namespace

:::::: TO: Chao Yu <yuchao0@huawei.com>
:::::: CC: Jaegeuk Kim <jaegeuk@kernel.org>

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