fs/dcache: Fix incorrect nr_dentry_unused accounting in shrink_dcache_sb()
The nr_dentry_unused per-cpu counter tracks dentries in both the LRU lists and the shrink lists where the DCACHE_LRU_LIST bit is set. The shrink_dcache_sb() function moves dentries from the LRU list to a shrink list and subtracts the dentry count from nr_dentry_unused. This is incorrect as the nr_dentry_unused count will also be decremented in shrink_dentry_list() via d_shrink_del(). To fix this double decrement, the decrement in the shrink_dcache_sb() function is taken out. Fixes: 4e717f5c ("list_lru: remove special case function list_lru_dispose_all." Cc: stable@kernel.org Signed-off-by: NWaiman Long <longman@redhat.com> Reviewed-by: NDave Chinner <dchinner@redhat.com> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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