Messages in this thread |  | | Date | Sat, 29 May 2021 23:56:23 +0800 | From | kernel test robot <> | Subject | Re: [PATCH] uprobes: Use better bitmap_zalloc() |
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Hi Kefeng,
Thank you for the patch! Yet something to improve:
[auto build test ERROR on tip/perf/core] [also build test ERROR on linux/master linus/master v5.13-rc3 next-20210528] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch]
url: https://github.com/0day-ci/linux/commits/Kefeng-Wang/uprobes-Use-better-bitmap_zalloc/20210529-190812 base: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git 875dd7bf548104bc1d2c5784a6af6cf38215a216 config: x86_64-randconfig-a006-20210529 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project bc6799f2f79f0ae87e9f1ebf9d25ba799fbd25a9) 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 x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # https://github.com/0day-ci/linux/commit/346b85395aa484f7b3b64a53e197bc7f56a4e719 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Kefeng-Wang/uprobes-Use-better-bitmap_zalloc/20210529-190812 git checkout 346b85395aa484f7b3b64a53e197bc7f56a4e719 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64
If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@intel.com>
All errors (new ones prefixed by >>):
>> kernel/events/uprobes.c:1490:17: error: implicit declaration of function 'bitmap_kzalloc' [-Werror,-Wimplicit-function-declaration] area->bitmap = bitmap_kzalloc(UINSNS_PER_PAGE, GFP_KERNEL); ^ kernel/events/uprobes.c:1490:17: note: did you mean 'bitmap_zalloc'? include/linux/bitmap.h:125:16: note: 'bitmap_zalloc' declared here unsigned long *bitmap_zalloc(unsigned int nbits, gfp_t flags); ^ kernel/events/uprobes.c:1490:15: warning: incompatible integer to pointer conversion assigning to 'unsigned long *' from 'int' [-Wint-conversion] area->bitmap = bitmap_kzalloc(UINSNS_PER_PAGE, GFP_KERNEL); ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ >> kernel/events/uprobes.c:1514:2: error: implicit declaration of function 'bitmap_kfree' [-Werror,-Wimplicit-function-declaration] bitmap_kfree(area->bitmap); ^ kernel/events/uprobes.c:1514:2: note: did you mean 'bitmap_free'? include/linux/bitmap.h:126:6: note: 'bitmap_free' declared here void bitmap_free(const unsigned long *bitmap); ^ kernel/events/uprobes.c:1555:2: error: implicit declaration of function 'bitmap_kfree' [-Werror,-Wimplicit-function-declaration] bitmap_kfree(area->bitmap); ^ 1 warning and 3 errors generated.
vim +/bitmap_kzalloc +1490 kernel/events/uprobes.c
1479 1480 static struct xol_area *__create_xol_area(unsigned long vaddr) 1481 { 1482 struct mm_struct *mm = current->mm; 1483 uprobe_opcode_t insn = UPROBE_SWBP_INSN; 1484 struct xol_area *area; 1485 1486 area = kmalloc(sizeof(*area), GFP_KERNEL); 1487 if (unlikely(!area)) 1488 goto out; 1489 > 1490 area->bitmap = bitmap_kzalloc(UINSNS_PER_PAGE, GFP_KERNEL); 1491 if (!area->bitmap) 1492 goto free_area; 1493 1494 area->xol_mapping.name = "[uprobes]"; 1495 area->xol_mapping.fault = NULL; 1496 area->xol_mapping.pages = area->pages; 1497 area->pages[0] = alloc_page(GFP_HIGHUSER); 1498 if (!area->pages[0]) 1499 goto free_bitmap; 1500 area->pages[1] = NULL; 1501 1502 area->vaddr = vaddr; 1503 init_waitqueue_head(&area->wq); 1504 /* Reserve the 1st slot for get_trampoline_vaddr() */ 1505 set_bit(0, area->bitmap); 1506 atomic_set(&area->slot_count, 1); 1507 arch_uprobe_copy_ixol(area->pages[0], 0, &insn, UPROBE_SWBP_INSN_SIZE); 1508 1509 if (!xol_add_vma(mm, area)) 1510 return area; 1511 1512 __free_page(area->pages[0]); 1513 free_bitmap: > 1514 bitmap_kfree(area->bitmap); 1515 free_area: 1516 kfree(area); 1517 out: 1518 return NULL; 1519 } 1520
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