From: kernel test robot <lkp@intel.com>
To: oe-kbuild@lists.linux.dev
Cc: lkp@intel.com, Julia Lawall <julia.lawall@inria.fr>
Subject: Re: [PATCH] zram: Using GFP_ATOMIC instead of GFP_KERNEL to allocate bitmap memory in backing_dev_store
Date: Wed, 6 Dec 2023 16:08:49 +0800 [thread overview]
Message-ID: <202312061559.CDXHSGIQ-lkp@intel.com> (raw)
BCC: lkp@intel.com
CC: oe-kbuild-all@lists.linux.dev
In-Reply-To: <20231130152047.200169-1-dongyun.liu@transsion.com>
References: <20231130152047.200169-1-dongyun.liu@transsion.com>
TO: Dongyun Liu <dongyun.liu3@gmail.com>
TO: minchan@kernel.org
TO: senozhatsky@chromium.org
TO: axboe@kernel.dk
CC: linux-kernel@vger.kernel.org
CC: linux-block@vger.kernel.org
CC: lincheng.yang@transsion.com
CC: jiajun.ling@transsion.com
CC: ldys2014@foxmail.com
CC: Dongyun Liu <dongyun.liu@transsion.com>
Hi Dongyun,
kernel test robot noticed the following build warnings:
[auto build test WARNING on axboe-block/for-next]
[also build test WARNING on linus/master v6.7-rc4 next-20231206]
[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#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Dongyun-Liu/zram-Using-GFP_ATOMIC-instead-of-GFP_KERNEL-to-allocate-bitmap-memory-in-backing_dev_store/20231130-233042
base: https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git for-next
patch link: https://lore.kernel.org/r/20231130152047.200169-1-dongyun.liu%40transsion.com
patch subject: [PATCH] zram: Using GFP_ATOMIC instead of GFP_KERNEL to allocate bitmap memory in backing_dev_store
:::::: branch date: 6 days ago
:::::: commit date: 6 days ago
config: i386-randconfig-051-20231201 (https://download.01.org/0day-ci/archive/20231206/202312061559.CDXHSGIQ-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce: (https://download.01.org/0day-ci/archive/20231206/202312061559.CDXHSGIQ-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>
| Reported-by: Julia Lawall <julia.lawall@inria.fr>
| Closes: https://lore.kernel.org/r/202312061559.CDXHSGIQ-lkp@intel.com/
cocci warnings: (new ones prefixed by >>)
>> drivers/block/zram/zram_drv.c:536:14-15: WARNING kmalloc is used to allocate this memory at line 517
vim +536 drivers/block/zram/zram_drv.c
013bf95a83ec76 Minchan Kim 2017-09-06 459
013bf95a83ec76 Minchan Kim 2017-09-06 460 static ssize_t backing_dev_store(struct device *dev,
013bf95a83ec76 Minchan Kim 2017-09-06 461 struct device_attribute *attr, const char *buf, size_t len)
013bf95a83ec76 Minchan Kim 2017-09-06 462 {
013bf95a83ec76 Minchan Kim 2017-09-06 463 char *file_name;
c8bd134a4bddaf Peter Kalauskas 2018-08-21 464 size_t sz;
013bf95a83ec76 Minchan Kim 2017-09-06 465 struct file *backing_dev = NULL;
013bf95a83ec76 Minchan Kim 2017-09-06 466 struct inode *inode;
013bf95a83ec76 Minchan Kim 2017-09-06 467 struct address_space *mapping;
ee763e2143e79f Christoph Hellwig 2020-11-16 468 unsigned int bitmap_sz;
1363d4662a0d28 Minchan Kim 2017-09-06 469 unsigned long nr_pages, *bitmap = NULL;
eed993a0910338 Jan Kara 2023-09-27 470 struct bdev_handle *bdev_handle = NULL;
013bf95a83ec76 Minchan Kim 2017-09-06 471 int err;
013bf95a83ec76 Minchan Kim 2017-09-06 472 struct zram *zram = dev_to_zram(dev);
013bf95a83ec76 Minchan Kim 2017-09-06 473
013bf95a83ec76 Minchan Kim 2017-09-06 474 file_name = kmalloc(PATH_MAX, GFP_KERNEL);
013bf95a83ec76 Minchan Kim 2017-09-06 475 if (!file_name)
013bf95a83ec76 Minchan Kim 2017-09-06 476 return -ENOMEM;
013bf95a83ec76 Minchan Kim 2017-09-06 477
013bf95a83ec76 Minchan Kim 2017-09-06 478 down_write(&zram->init_lock);
013bf95a83ec76 Minchan Kim 2017-09-06 479 if (init_done(zram)) {
013bf95a83ec76 Minchan Kim 2017-09-06 480 pr_info("Can't setup backing device for initialized device\n");
013bf95a83ec76 Minchan Kim 2017-09-06 481 err = -EBUSY;
013bf95a83ec76 Minchan Kim 2017-09-06 482 goto out;
013bf95a83ec76 Minchan Kim 2017-09-06 483 }
013bf95a83ec76 Minchan Kim 2017-09-06 484
e55e1b4831563e Wolfram Sang 2022-08-18 485 strscpy(file_name, buf, PATH_MAX);
c8bd134a4bddaf Peter Kalauskas 2018-08-21 486 /* ignore trailing newline */
c8bd134a4bddaf Peter Kalauskas 2018-08-21 487 sz = strlen(file_name);
c8bd134a4bddaf Peter Kalauskas 2018-08-21 488 if (sz > 0 && file_name[sz - 1] == '\n')
c8bd134a4bddaf Peter Kalauskas 2018-08-21 489 file_name[sz - 1] = 0x00;
013bf95a83ec76 Minchan Kim 2017-09-06 490
013bf95a83ec76 Minchan Kim 2017-09-06 491 backing_dev = filp_open(file_name, O_RDWR|O_LARGEFILE, 0);
013bf95a83ec76 Minchan Kim 2017-09-06 492 if (IS_ERR(backing_dev)) {
013bf95a83ec76 Minchan Kim 2017-09-06 493 err = PTR_ERR(backing_dev);
013bf95a83ec76 Minchan Kim 2017-09-06 494 backing_dev = NULL;
013bf95a83ec76 Minchan Kim 2017-09-06 495 goto out;
013bf95a83ec76 Minchan Kim 2017-09-06 496 }
013bf95a83ec76 Minchan Kim 2017-09-06 497
013bf95a83ec76 Minchan Kim 2017-09-06 498 mapping = backing_dev->f_mapping;
013bf95a83ec76 Minchan Kim 2017-09-06 499 inode = mapping->host;
013bf95a83ec76 Minchan Kim 2017-09-06 500
013bf95a83ec76 Minchan Kim 2017-09-06 501 /* Support only block device in this moment */
013bf95a83ec76 Minchan Kim 2017-09-06 502 if (!S_ISBLK(inode->i_mode)) {
013bf95a83ec76 Minchan Kim 2017-09-06 503 err = -ENOTBLK;
013bf95a83ec76 Minchan Kim 2017-09-06 504 goto out;
013bf95a83ec76 Minchan Kim 2017-09-06 505 }
013bf95a83ec76 Minchan Kim 2017-09-06 506
eed993a0910338 Jan Kara 2023-09-27 507 bdev_handle = bdev_open_by_dev(inode->i_rdev,
eed993a0910338 Jan Kara 2023-09-27 508 BLK_OPEN_READ | BLK_OPEN_WRITE, zram, NULL);
eed993a0910338 Jan Kara 2023-09-27 509 if (IS_ERR(bdev_handle)) {
eed993a0910338 Jan Kara 2023-09-27 510 err = PTR_ERR(bdev_handle);
eed993a0910338 Jan Kara 2023-09-27 511 bdev_handle = NULL;
013bf95a83ec76 Minchan Kim 2017-09-06 512 goto out;
5547932dc67a48 Minchan Kim 2018-12-28 513 }
013bf95a83ec76 Minchan Kim 2017-09-06 514
1363d4662a0d28 Minchan Kim 2017-09-06 515 nr_pages = i_size_read(inode) >> PAGE_SHIFT;
1363d4662a0d28 Minchan Kim 2017-09-06 516 bitmap_sz = BITS_TO_LONGS(nr_pages) * sizeof(long);
e51f2361fc7fd9 Dongyun Liu 2023-11-30 @517 bitmap = kmalloc(bitmap_sz, GFP_ATOMIC);
1363d4662a0d28 Minchan Kim 2017-09-06 518 if (!bitmap) {
1363d4662a0d28 Minchan Kim 2017-09-06 519 err = -ENOMEM;
1363d4662a0d28 Minchan Kim 2017-09-06 520 goto out;
1363d4662a0d28 Minchan Kim 2017-09-06 521 }
1363d4662a0d28 Minchan Kim 2017-09-06 522
013bf95a83ec76 Minchan Kim 2017-09-06 523 reset_bdev(zram);
013bf95a83ec76 Minchan Kim 2017-09-06 524
eed993a0910338 Jan Kara 2023-09-27 525 zram->bdev_handle = bdev_handle;
013bf95a83ec76 Minchan Kim 2017-09-06 526 zram->backing_dev = backing_dev;
1363d4662a0d28 Minchan Kim 2017-09-06 527 zram->bitmap = bitmap;
1363d4662a0d28 Minchan Kim 2017-09-06 528 zram->nr_pages = nr_pages;
013bf95a83ec76 Minchan Kim 2017-09-06 529 up_write(&zram->init_lock);
013bf95a83ec76 Minchan Kim 2017-09-06 530
013bf95a83ec76 Minchan Kim 2017-09-06 531 pr_info("setup backing device %s\n", file_name);
013bf95a83ec76 Minchan Kim 2017-09-06 532 kfree(file_name);
013bf95a83ec76 Minchan Kim 2017-09-06 533
013bf95a83ec76 Minchan Kim 2017-09-06 534 return len;
013bf95a83ec76 Minchan Kim 2017-09-06 535 out:
1363d4662a0d28 Minchan Kim 2017-09-06 @536 kvfree(bitmap);
1363d4662a0d28 Minchan Kim 2017-09-06 537
eed993a0910338 Jan Kara 2023-09-27 538 if (bdev_handle)
eed993a0910338 Jan Kara 2023-09-27 539 bdev_release(bdev_handle);
013bf95a83ec76 Minchan Kim 2017-09-06 540
013bf95a83ec76 Minchan Kim 2017-09-06 541 if (backing_dev)
013bf95a83ec76 Minchan Kim 2017-09-06 542 filp_close(backing_dev, NULL);
013bf95a83ec76 Minchan Kim 2017-09-06 543
013bf95a83ec76 Minchan Kim 2017-09-06 544 up_write(&zram->init_lock);
013bf95a83ec76 Minchan Kim 2017-09-06 545
013bf95a83ec76 Minchan Kim 2017-09-06 546 kfree(file_name);
013bf95a83ec76 Minchan Kim 2017-09-06 547
013bf95a83ec76 Minchan Kim 2017-09-06 548 return err;
013bf95a83ec76 Minchan Kim 2017-09-06 549 }
013bf95a83ec76 Minchan Kim 2017-09-06 550
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
next reply other threads:[~2023-12-06 8:09 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-12-06 8:08 kernel test robot [this message]
-- strict thread matches above, loose matches on Subject: below --
2023-11-30 15:20 [PATCH] zram: Using GFP_ATOMIC instead of GFP_KERNEL to allocate bitmap memory in backing_dev_store Dongyun Liu
2023-11-30 15:37 ` Jens Axboe
2023-12-01 6:51 ` Dongyun Liu
2023-12-01 14:19 ` Jens Axboe
2023-12-01 15:28 ` Sergey Senozhatsky
2023-12-02 13:54 ` Dongyun Liu
2023-12-01 15:39 ` Sergey Senozhatsky
2023-12-02 15:50 ` Dongyun Liu
2023-12-03 1:23 ` Sergey Senozhatsky
2023-12-03 14:45 ` Dongyun Liu
2023-12-01 18:41 ` Minchan Kim
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