ext4: do not unnecessarily allocate buffer in recently_deleted()
In recently_deleted() function we want to check whether inode is still cached in buffer cache. Use sb_find_get_block() for that instead of sb_getblk() to avoid unnecessary allocation of bdev page and buffer heads. Signed-off-by: NJan Kara <jack@suse.cz> Signed-off-by: NTheodore Ts'o <tytso@mit.edu>
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