[openeuler:OLK-5.10 2882/2882] mm/hugetlb.c:2216:9: warning: variable 'gfp' set but not used

[openeuler:OLK-5.10 2882/2882] mm/hugetlb.c:2216:9: warning: variable 'gfp' set but not used

[kernel test robot]

tree:   https://gitee.com/openeuler/kernel.git OLK-5.10
head:   4fdf755b0cabc80fc65da83c9da27ec2cee144dc
commit: 27a782f719fdab073c5b0e19764fad1f93cddd00 [2882/2882] mm/hugetlb: add support for mempolicy MPOL_PREFERRED_MANY
config: x86_64-randconfig-2002-20250501 (https://download.01.org/0day-ci/archive/20250702/202507020936.wpYnAMsn-lkp@intel.com/config)
compiler: clang version 20.1.2 (https://github.com/llvm/llvm-project 58df0ef89dd64126512e4ee27b4ac3fd8ddf6247)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250702/202507020936.wpYnAMsn-lkp@intel.com/reproduce)

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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202507020936.wpYnAMsn-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> mm/hugetlb.c:2216:9: warning: variable 'gfp' set but not used [-Wunused-but-set-variable]
    2216 |                 gfp_t gfp = gfp_mask | __GFP_NOWARN;
         |                       ^
   1 warning generated.


vim +/gfp +2216 mm/hugetlb.c

  2200	
  2201	/*
  2202	 * Use the VMA's mpolicy to allocate a huge page from the buddy.
  2203	 */
  2204	static
  2205	struct page *alloc_buddy_huge_page_with_mpol(struct hstate *h,
  2206			struct vm_area_struct *vma, unsigned long addr)
  2207	{
  2208		struct page *page = NULL;
  2209		struct mempolicy *mpol;
  2210		gfp_t gfp_mask = htlb_alloc_mask(h);
  2211		int nid;
  2212		nodemask_t *nodemask;
  2213	
  2214		nid = huge_node(vma, addr, gfp_mask, &mpol, &nodemask);
  2215		if (mpol_is_preferred_many(mpol)) {
> 2216			gfp_t gfp = gfp_mask | __GFP_NOWARN;
  2217	
  2218			gfp &=  ~(__GFP_DIRECT_RECLAIM | __GFP_NOFAIL);
  2219			page = alloc_surplus_huge_page(h, gfp_mask, nid, nodemask);
  2220	
  2221			/* Fallback to all nodes if page==NULL */
  2222			nodemask = NULL;
  2223		}
  2224	
  2225		if (!page)
  2226			page = alloc_surplus_huge_page(h, gfp_mask, nid, nodemask);
  2227		mpol_cond_put(mpol);
  2228		return page;
  2229	}
  2230	

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