mbcache: Add functions to delete entry if unused
hulk inclusion category: bugfix bugzilla: 186975, https://gitee.com/openeuler/kernel/issues/I5HT6F CVE: NA Reference: https://patchwork.ozlabs.org/project/linux-ext4/list/?series=309169 -------------------------------- Add function mb_cache_entry_delete_or_get() to delete mbcache entry if it is unused and also add a function to wait for entry to become unused - mb_cache_entry_wait_unused(). We do not share code between the two deleting function as one of them will go away soon. CC: stable@vger.kernel.org Fixes: 82939d79 ("ext4: convert to mbcache2") Signed-off-by:Jan Kara <jack@suse.cz> Signed-off-by:
Zhihao Cheng <chengzhihao1@huawei.com> Reviewed-by:
Zhang Yi <yi.zhang@huawei.com> Signed-off-by:
Yongqiang Liu <liuyongqiang13@huawei.com>
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