Re: [linux-next:master 6447/7105] mm/mempolicy.c:2280:15: error: redefinition of 'folio_alloc_mpol_noprof'

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On Fri, Jun 21, 2024 at 11:17:05AM +0800, Kefeng Wang wrote:
> 
> 
> On 2024/6/20 23:55, kernel test robot wrote:
> > tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
> > head:   2102cb0d050d34d50b9642a3a50861787527e922
> > commit: f85385e70cb4bbb569298830fdf0a3d8325de36d [6447/7105] mm: add folio_alloc_mpol()
> > config: x86_64-randconfig-014-20240202 (https://download.01.org/0day-ci/archive/20240620/202406202319.pBcCfVar-lkp@xxxxxxxxx/config)
> > compiler: gcc-13 (Ubuntu 13.2.0-4ubuntu3) 13.2.0
> > reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240620/202406202319.pBcCfVar-lkp@xxxxxxxxx/reproduce)
> 
> Hi, thanks for report, I try with gcc-13 from 0day[1], but can't
> reproduce with above config.
> 
> [1] https://download.01.org/0day-ci/cross-package/gcc-13.2.0-nolibc
> 
> > 
> > If you fix the issue in a separate patch/commit (i.e. not just a new version of
> > the same patch/commit), kindly add following tags
> > | Reported-by: kernel test robot <lkp@xxxxxxxxx>
> > | Closes: https://lore.kernel.org/oe-kbuild-all/202406202319.pBcCfVar-lkp@xxxxxxxxx/
> > 
> > All errors (new ones prefixed by >>):
> > 
> >           |                        ^~
> >     mm/mempolicy.c:2058:35: error: 'struct mempolicy' has no member named 'home_node'
> >      2058 |                         *nid = pol->home_node;
> >           |                                   ^~
> >     mm/mempolicy.c:2063:60: error: 'struct mempolicy' has no member named 'nodes'
> >      2063 |                     cpuset_nodemask_valid_mems_allowed(&pol->nodes))
> >           |                                                            ^~
> >     mm/mempolicy.c:2064:40: error: 'struct mempolicy' has no member named 'nodes'
> >      2064 |                         nodemask = &pol->nodes;
> >           |                                        ^~
> >     mm/mempolicy.c:2065:24: error: 'struct mempolicy' has no member named 'home_node'
> >      2065 |                 if (pol->home_node != NUMA_NO_NODE)
> >           |                        ^~
> >     mm/mempolicy.c:2066:35: error: 'struct mempolicy' has no member named 'home_node'
> >      2066 |                         *nid = pol->home_node;
> >           |                                   ^~
> >     mm/mempolicy.c: At top level:
> >     mm/mempolicy.c:2172:6: warning: no previous prototype for 'mempolicy_in_oom_domain' [-Wmissing-prototypes]
> >      2172 | bool mempolicy_in_oom_domain(struct task_struct *tsk,
> >           |      ^~~~~~~~~~~~~~~~~~~~~~~
> >     mm/mempolicy.c: In function 'mempolicy_in_oom_domain':
> >     mm/mempolicy.c:2182:26: error: 'struct task_struct' has no member named 'mempolicy'; did you mean 'policy'?
> >      2182 |         mempolicy = tsk->mempolicy;
> >           |                          ^~~~~~~~~
> >           |                          policy
> >     mm/mempolicy.c:2183:35: error: 'struct mempolicy' has no member named 'mode'
> >      2183 |         if (mempolicy && mempolicy->mode == MPOL_BIND)
> >           |                                   ^~
> >     mm/mempolicy.c:2184:49: error: 'struct mempolicy' has no member named 'nodes'
> >      2184 |                 ret = nodes_intersects(mempolicy->nodes, *mask);
> >           |                                                 ^~
> >     include/linux/nodemask.h:211:46: note: in definition of macro 'nodes_intersects'
> >       211 |                         __nodes_intersects(&(src1), &(src2), MAX_NUMNODES)
> 
> 
> 
> The above error is strange, my change shouldn't affect them.

Hi Kefeng, sorry for confusion, usually you only need take care of the issue
that is prefixed with >>, which is the new issue being introduced by the commit.
Other issues exist due to existing commits.

> 
> >           |                                              ^~~~
> >     mm/mempolicy.c: At top level:
> >     mm/mempolicy.c:2221:14: error: redefinition of 'alloc_pages_mpol_noprof'
> >      2221 | struct page *alloc_pages_mpol_noprof(gfp_t gfp, unsigned int order,

[...]

> >           |              ^~~~~~~~~~~~~~~~~~~~~~~
> >           |                         __count_vm_event
> >     mm/mempolicy.c:2272:61: error: 'NUMA_INTERLEAVE_HIT' undeclared (first use in this function)
> >      2272 |                         __count_numa_event(page_zone(page), NUMA_INTERLEAVE_HIT);
> >           |                                                             ^~~~~~~~~~~~~~~~~~~
> >     mm/mempolicy.c: At top level:
> > > > mm/mempolicy.c:2280:15: error: redefinition of 'folio_alloc_mpol_noprof'
> >      2280 | struct folio *folio_alloc_mpol_noprof(gfp_t gfp, unsigned int order,

For this report, you can check whether this issue can be reproduced or not.

> >           |               ^~~~~~~~~~~~~~~~~~~~~~~
> >     include/linux/gfp.h:324:29: note: previous definition of 'folio_alloc_mpol_noprof' with type 'struct folio *(gfp_t,  unsigned int,  struct mempolicy *, long unsigned int,  int)' {aka 'struct folio *(unsigned int,  unsigned int,  struct mempolicy *, long unsigned int,  int)'}
> >       324 | static inline struct folio *folio_alloc_mpol_noprof(gfp_t gfp, unsigned int order,
> >           |                             ^~~~~~~~~~~~~~~~~~~~~~~
> >     include/linux/gfp.h:330:9: error: conflicting types for 'folio_alloc_noprof'; have 'struct folio *(gfp_t,  int)' {aka 'struct folio *(unsigned int,  int)'}
> >       330 |         folio_alloc_noprof(gfp, order)
> >           |         ^~~~~~~~~~~~~~~~~~
> >     mm/mempolicy.c:2303:15: note: in expansion of macro 'vma_alloc_folio_noprof'
> >      2303 | struct folio *vma_alloc_folio_noprof(gfp_t gfp, int order, struct vm_area_struct *vma,
> >           |               ^~~~~~~~~~~~~~~~~~~~~~
> >     include/linux/gfp.h:320:29: note: previous definition of 'folio_alloc_noprof' with type 'struct folio *(gfp_t,  unsigned int)' {aka 'struct folio *(unsigned int,  unsigned int)'}
> >       320 | static inline struct folio *folio_alloc_noprof(gfp_t gfp, unsigned int order)
> >           |                             ^~~~~~~~~~~~~~~~~~
> >     mm/mempolicy.c: In function 'folio_alloc_noprof':
> >     mm/mempolicy.c:2310:30: error: 'vma' undeclared (first use in this function)
> >      2310 |         pol = get_vma_policy(vma, addr, order, &ilx);
> >           |                              ^~~
> >     mm/mempolicy.c:2310:35: error: 'addr' undeclared (first use in this function)
> >      2310 |         pol = get_vma_policy(vma, addr, order, &ilx);
> >           |                                   ^~~~
> >     In file included from include/linux/linkage.h:7,
> >                      from arch/x86/include/asm/cache.h:5,
> >                      from include/linux/cache.h:6,
> >                      from arch/x86/include/asm/current.h:10:
> >     mm/mempolicy.c: At top level:
> >     mm/mempolicy.c:2316:15: error: 'vma_alloc_folio_noprof' undeclared here (not in a function); did you mean 'filemap_alloc_folio_noprof'?
> >      2316 | EXPORT_SYMBOL(vma_alloc_folio_noprof);
> >           |               ^~~~~~~~~~~~~~~~~~~~~~
> >     include/linux/export.h:56:23: note: in definition of macro '__EXPORT_SYMBOL'
> >        56 |         extern typeof(sym) sym;                                 \
> >           |                       ^~~
> >     include/linux/export.h:68:41: note: in expansion of macro '_EXPORT_SYMBOL'
> >        68 | #define EXPORT_SYMBOL(sym)              _EXPORT_SYMBOL(sym, "")
> >           |                                         ^~~~~~~~~~~~~~
> >     mm/mempolicy.c:2316:1: note: in expansion of macro 'EXPORT_SYMBOL'
> >      2316 | EXPORT_SYMBOL(vma_alloc_folio_noprof);
> >           | ^~~~~~~~~~~~~
> >     mm/mempolicy.c:2332:14: error: redefinition of 'alloc_pages_noprof'
> >      2332 | struct page *alloc_pages_noprof(gfp_t gfp, unsigned int order)
> >           |              ^~~~~~~~~~~~~~~~~~
> >     include/linux/gfp.h:311:28: note: previous definition of 'alloc_pages_noprof' with type 'struct page *(gfp_t,  unsigned int)' {aka 'struct page *(unsigned int,  unsigned int)'}
> >       311 | static inline struct page *alloc_pages_noprof(gfp_t gfp_mask, unsigned int order)
> >           |                            ^~~~~~~~~~~~~~~~~~
> >     mm/mempolicy.c:2348:15: error: conflicting types for 'folio_alloc_noprof'; have 'struct folio *(gfp_t,  unsigned int)' {aka 'struct folio *(unsigned int,  unsigned int)'}
> >      2348 | struct folio *folio_alloc_noprof(gfp_t gfp, unsigned int order)
> >           |               ^~~~~~~~~~~~~~~~~~
> >     include/lsinux/gfp.h:330:9: note: previous definition of 'folio_alloc_noprof' with type 'struct folio *(gfp_t,  int)' {aka 'struct folio *(unsigned int,  int)'}
> >       330 |         folio_alloc_noprof(gfp, order)
> >           |         ^~~~~~~~~~~~~~~~~~
> >     mm/mempolicy.c:2303:15: note: in expansion of macro 'vma_alloc_folio_noprof'
> >      2303 | struct folio *vma_alloc_folio_noprof(gfp_t gfp, int order, struct vm_area_struct *vma,
> >           |               ^~~~~~~~~~~~~~~~~~~~~~
> >     mm/mempolicy.c: In function 'alloc_pages_bulk_array_interleave':
> >     mm/mempolicy.c:2365:33: error: 'struct mempolicy' has no member named 'nodes'
> >      2365 |         nodes = nodes_weight(pol->nodes);
> >           |                                 ^~
> >     include/linux/nodemask.h:238:49: note: in definition of macro 'nodes_weight'
> >       238 | #define nodes_weight(nodemask) __nodes_weight(&(nodemask), MAX_NUMNODES)
> >           |                                                 ^~~~~~~~
> >     mm/mempolicy.c: In function 'alloc_pages_bulk_array_weighted_interleave':
> >     mm/mempolicy.c:2423:18: error: 'struct task_struct' has no member named 'il_prev'
> >      2423 |         node = me->il_prev;
> >           |                  ^~
> >     mm/mempolicy.c:2424:20: error: 'struct task_struct' has no member named 'il_weight'
> >      2424 |         weight = me->il_weight;
> >           |                    ^~
> >     mm/mempolicy.c:2433:27: error: 'struct task_struct' has no member named 'il_weight'
> >      2433 |                         me->il_weight -= rem_pages;
> >           |                           ^~
> >     mm/mempolicy.c:2440:11: error: 'struct task_struct' has no member named 'il_weight'
> >      2440 |         me->il_weight = 0;
> >           |           ^~
> >     mm/mempolicy.c:2498:11: error: 'struct task_struct' has no member named 'il_prev'
> >      2498 |         me->il_prev = resume_node;
> >           |           ^~
> >     mm/mempolicy.c:2499:11: error: 'struct task_struct' has no member named 'il_weight'
> >      2499 |         me->il_weight = resume_weight;
> >           |           ^~
> >     mm/mempolicy.c: In function 'alloc_pages_bulk_array_preferred_many':
> >     mm/mempolicy.c:2514:73: error: 'struct mempolicy' has no member named 'nodes'
> >      2514 |         nr_allocated  = alloc_pages_bulk_noprof(preferred_gfp, nid, &pol->nodes,
> >           |                                                                         ^~
> >     mm/mempolicy.c: In function 'alloc_pages_bulk_array_mempolicy_noprof':
> >     mm/mempolicy.c:2540:16: error: 'struct mempolicy' has no member named 'mode'
> >      2540 |         if (pol->mode == MPOL_INTERLEAVE)
> >           |                ^~
> >     mm/mempolicy.c:2544:16: error: 'struct mempolicy' has no member named 'mode'
> >      2544 |         if (pol->mode == MPOL_WEIGHTED_INTERLEAVE)
> >           |                ^~
> >     mm/mempolicy.c:2548:16: error: 'struct mempolicy' has no member named 'mode'
> >      2548 |         if (pol->mode == MPOL_PREFERRED_MANY)
> >           |                ^~
> >     mm/mempolicy.c: At top level:
> >     mm/mempolicy.c:2558:5: error: redefinition of 'vma_dup_policy'
> >      2558 | int vma_dup_policy(struct vm_area_struct *src, struct vm_area_struct *dst)
> >           |     ^~~~~~~~~~~~~~
> >     include/linux/mempolicy.h:232:1: note: previous definition of 'vma_dup_policy' with type 'int(struct vm_area_struct *, struct vm_area_struct *)'
> >       232 | vma_dup_policy(struct vm_area_struct *src, struct vm_area_struct *dst)
> 
> ditto..
> 
> 
> struct mempolicy is empty when NUMA off, but  mempolicy.c won't be compiled
> if NUMA off,
> 
> $ cat mm/Makefile  | grep mempolicy
> obj-$(CONFIG_NUMA) 	+= mempolicy.o
> 
> Any though ?
> 
> 
> 
> >           | ^~~~~~~~~~~~~~
> > 
> > 
> > vim +/folio_alloc_mpol_noprof +2280 mm/mempolicy.c
> > 
> >    2279	
> > > 2280	struct folio *folio_alloc_mpol_noprof(gfp_t gfp, unsigned int order,
> >    2281			struct mempolicy *pol, pgoff_t ilx, int nid)
> >    2282	{
> >    2283		return page_rmappable_folio(alloc_pages_mpol_noprof(gfp | __GFP_COMP,
> >    2284								order, pol, ilx, nid));
> >    2285	}
> >    2286	
> > 
> 




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