• Linus Torvalds's avatar
    vfs: make it possible to access the dentry hash/len as one 64-bit entry · 26fe5750
    Linus Torvalds authored
    This allows comparing hash and len in one operation on 64-bit
    architectures.  Right now only __d_lookup_rcu() takes advantage of this,
    since that is the case we care most about.
    
    The use of anonymous struct/unions hides the alternate 64-bit approach
    from most users, the exception being a few cases where we initialize a
    'struct qstr' with a static initializer.  This makes the problematic
    cases use a new QSTR_INIT() helper function for that (but initializing
    just the name pointer with a "{ .name = xyzzy }" initializer remains
    valid, as does just copying another qstr structure).
    Signed-off-by: 's avatarLinus Torvalds <torvalds@linux-foundation.org>
    26fe5750
libfs.c 25.8 KB