Hi Liu, FYI, the error/warning still remains. tree: https://gitee.com/openeuler/kernel.git OLK-6.6 head: 3e16741023a15d92f4be3343cb4d8b508327dda3 commit: fd855715f24e3eeadaa56de5fde21c55a14aeea0 [2938/2938] mm/mem_reliable: Fallback to dpool if reliable memory is not enough config: arm64-randconfig-003-20250926 (https://download.01.org/0day-ci/archive/20250926/202509261459.GIpDqA4A-lkp@i...) compiler: aarch64-linux-gcc (GCC) 9.5.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250926/202509261459.GIpDqA4A-lkp@i...) 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/202509261459.GIpDqA4A-lkp@intel.com/ All errors (new ones prefixed by >>): mm/page_alloc.c: In function 'mem_reliable_fallback_dpool':

...

mm/page_alloc.c:4110:9: error: implicit declaration of function 'dynamic_pool_should_alloc' [-Werror=implicit-function-declaration] 4110 | return dynamic_pool_should_alloc(gfp_mask & ~GFP_RELIABLE, order); | ^~~~~~~~~~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors

vim +/dynamic_pool_should_alloc +4110 mm/page_alloc.c 4101 4102 static inline bool mem_reliable_fallback_dpool(gfp_t gfp_mask, unsigned int order) 4103 { 4104 if (!reliable_allow_fb_enabled()) 4105 return false; 4106 4107 if (!(gfp_mask & GFP_RELIABLE)) 4108 return false; 4109

4110 return dynamic_pool_should_alloc(gfp_mask & ~GFP_RELIABLE, order); 4111 } 4112 #else 4113 static inline struct zone *mem_reliable_fallback_zone(gfp_t gfp_mask, 4114 struct alloc_context *ac) 4115 { 4116 return NULL; 4117 } 4118 static inline void mem_reliable_fallback_slowpath(gfp_t gfp_mask, 4119 struct alloc_context *ac) {} 4120 static inline bool mem_reliable_fallback_dpool(gfp_t gfp_mask, unsigned int order) 4121 { 4122 return false; 4123 } 4124 #endif 4125

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