tree: https://gitee.com/openeuler/kernel.git OLK-5.10 head: a3384275f6f1faae9ddfeb8d95a66345f1e58b94 commit: 0cd6fd52741f659d2a57501ca933ab33040cb911 [2768/2768] mm: Enhanced copy capabilities for Hygon processor config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20250226/202502261100.jDFUgPr4-lkp@i...) compiler: clang version 19.1.7 (https://github.com/llvm/llvm-project cd708029e0b2869e80abe31ddb175f7c35361f90) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250226/202502261100.jDFUgPr4-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/202502261100.jDFUgPr4-lkp@intel.com/ All warnings (new ones prefixed by >>): In file included from arch/x86/kernel/fpu/core.c:14: In file included from arch/x86/include/asm/traps.h:6: In file included from include/linux/kprobes.h:29: In file included from include/linux/ftrace.h:11: In file included from include/linux/kallsyms.h:12: In file included from include/linux/mm.h:1587: include/linux/vmstat.h:417:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion] 417 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~ ^ 418 | item]; | ~~~~ include/linux/vmstat.h:424:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion] 424 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~ ^ 425 | NR_VM_NUMA_STAT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~ include/linux/vmstat.h:431:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion] 431 | return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_" | ~~~~~~~~~~~ ^ ~~~ include/linux/vmstat.h:436:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion] 436 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~ ^ 437 | NR_VM_NUMA_STAT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~ include/linux/vmstat.h:445:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion] 445 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~ ^ 446 | NR_VM_NUMA_STAT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~ arch/x86/kernel/fpu/core.c:444:14: warning: no previous prototype for function 'get_fpustate_free_space' [-Wmissing-prototypes] 444 | unsigned int get_fpustate_free_space(struct fpu *fpu) | ^ arch/x86/kernel/fpu/core.c:444:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 444 | unsigned int get_fpustate_free_space(struct fpu *fpu) | ^ | static

...

arch/x86/kernel/fpu/core.c:452:15: warning: no previous prototype for function 'get_fpu_registers_pos' [-Wmissing-prototypes] 452 | unsigned long get_fpu_registers_pos(struct fpu *fpu, unsigned int off) | ^ arch/x86/kernel/fpu/core.c:452:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 452 | unsigned long get_fpu_registers_pos(struct fpu *fpu, unsigned int off) | ^ | static arch/x86/kernel/fpu/core.c:533:6: warning: no previous prototype for function 'save_fpregs_to_fpkernelstate' [-Wmissing-prototypes] 533 | void save_fpregs_to_fpkernelstate(struct fpu *kfpu) | ^ arch/x86/kernel/fpu/core.c:533:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 533 | void save_fpregs_to_fpkernelstate(struct fpu *kfpu) | ^ | static 8 warnings generated.

vim +/get_fpu_registers_pos +452 arch/x86/kernel/fpu/core.c 451

452 unsigned long get_fpu_registers_pos(struct fpu *fpu, unsigned int off) 453 { 454 unsigned long addr = 0; 455 456 if (fpu && (fpu_kernel_nonatomic_xstate_size > off)) { 457 addr = (unsigned long)&fpu->__fpstate.regs.__padding[0]; 458 addr += fpu_kernel_cfg.default_size + off; 459 } 460 return addr; 461 } 462 463 /* 464 * We can call kernel_fpu_begin_nonatomic in non-atomic task context. 465 */ 466 int kernel_fpu_begin_nonatomic_mask(unsigned int kfpu_mask) 467 { 468 preempt_disable(); 469 /* we not support Nested call */ 470 if (test_thread_flag(TIF_USING_FPU_NONATOMIC)) 471 goto err; 472 473 if (KERNEL_FPU_NONATOMIC_SIZE > 474 get_fpustate_free_space(¤t->thread.fpu)) 475 goto err; 476 477 /* 478 * This means we call kernel_fpu_begin_nonatomic after kernel_fpu_begin, 479 * but before kernel_fpu_end. 480 */ 481 if (this_cpu_read(in_kernel_fpu)) 482 goto err; 483 484 if (in_interrupt()) 485 goto err; 486 487 if (current->flags & PF_KTHREAD) 488 goto err; 489 490 if (!test_thread_flag(TIF_NEED_FPU_LOAD)) { 491 set_thread_flag(TIF_NEED_FPU_LOAD); 492 save_fpregs_to_fpstate(¤t->thread.fpu); 493 } 494 /* Set thread flag: TIC_USING_FPU_NONATOMIC */ 495 set_thread_flag(TIF_USING_FPU_NONATOMIC); 496 497 __cpu_invalidate_fpregs_state(); 498 499 /* Put sane initial values into the control registers. */ 500 if (likely(kfpu_mask & KFPU_MXCSR) && boot_cpu_has(X86_FEATURE_XMM)) 501 ldmxcsr(MXCSR_DEFAULT); 502 503 if (unlikely(kfpu_mask & KFPU_387) && boot_cpu_has(X86_FEATURE_FPU)) 504 asm volatile ("fninit"); 505 506 preempt_enable(); 507 508 return 0; 509 510 err: 511 preempt_enable(); 512 513 return -1; 514 } 515 EXPORT_SYMBOL_GPL(kernel_fpu_begin_nonatomic_mask); 516 517 void kernel_fpu_end_nonatomic(void) 518 { 519 preempt_disable(); 520 /* 521 * This means we call kernel_fpu_end_nonatomic after kernel_fpu_begin, 522 * but before kernel_fpu_end. 523 */ 524 WARN_ON_FPU(this_cpu_read(in_kernel_fpu)); 525 526 WARN_ON_FPU(!test_thread_flag(TIF_USING_FPU_NONATOMIC)); 527 528 clear_thread_flag(TIF_USING_FPU_NONATOMIC); 529 preempt_enable(); 530 } 531 EXPORT_SYMBOL_GPL(kernel_fpu_end_nonatomic); 532 533 void save_fpregs_to_fpkernelstate(struct fpu *kfpu) 534 { 535 kernel_fpu_states_save((void *)get_fpu_registers_pos(kfpu, 536 MAX_FPU_CTX_SIZE), 537 NULL, MAX_FPU_CTX_SIZE); 538 } 539 #endif 540

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