]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commit
lib: parser: optimize match_NUMBER apis to use local array
authorLi Lingfeng <lilingfeng3@huawei.com>
Fri, 20 Jan 2023 03:23:52 +0000 (11:23 +0800)
committerAndrew Morton <akpm@linux-foundation.org>
Thu, 9 Feb 2023 23:56:51 +0000 (15:56 -0800)
commit67222c4ba8afe409d1e049a8f1e687c8a214fec7
treeef7f8ab438d02014220403e3ddc4875cdb00fd48
parentbadc28d4924bfed73efc93f716a0c3aa3afbdf6f
lib: parser: optimize match_NUMBER apis to use local array

Memory will be allocated to store substring_t in match_strdup(), which
means the caller of match_strdup() may need to be scheduled out to wait
for reclaiming memory.  smatch complains that this can cuase sleeping in
an atoic context.

Using local array to store substring_t to remove the restriction.

Link: https://lkml.kernel.org/r/20230120032352.242767-1-lilingfeng3@huawei.com
Link: https://lore.kernel.org/all/20221104023938.2346986-5-yukuai1@huaweicloud.com/
Link: https://lkml.kernel.org/r/20230120032352.242767-1-lilingfeng3@huawei.com
Fixes: 2c0647988433 ("blk-iocost: don't release 'ioc->lock' while updating params")
Signed-off-by: Li Lingfeng <lilingfeng3@huawei.com>
Reported-by: Yu Kuai <yukuai1@huaweicloud.com>
Acked-by: Tejun Heo <tj@kernel.org>
Cc: BingJing Chang <bingjingc@synology.com>
Cc: Eric Biggers <ebiggers@google.com>
Cc: Hou Tao <houtao1@huawei.com>
Cc: James Smart <james.smart@broadcom.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: yangerkun <yangerkun@huawei.com>
Cc: Zhang Yi <yi.zhang@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
lib/parser.c