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When an extended attribute block is modified, ext4_xattr_hash_entry() recalculates e_hash for the entry that is pointed by s->here. This is unnecessary if the modification is to remove an entry. Currently, if the removed entry is the last one and there are other entries remaining, hash calculation targets the just erased entry which has been filled with zeroes and effectively does nothing. If the removed entry is not the last one and there are more entries, this time it will recalculate hash on the next entry which is totally unnecessary. Fix these by moving the decision on when to recalculate hash to ext4_xattr_set_entry(). Signed-off-by: Tahsin Erdogan <tahsin@google.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.