• Linus Torvalds's avatar
    Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs · 33caf82a
    Linus Torvalds authored
    Pull misc vfs updates from Al Viro:
     "All kinds of stuff.  That probably should've been 5 or 6 separate
      branches, but by the time I'd realized how large and mixed that bag
      had become it had been too close to -final to play with rebasing.
      Some fs/namei.c cleanups there, memdup_user_nul() introduction and
      switching open-coded instances, burying long-dead code, whack-a-mole
      of various kinds, several new helpers for ->llseek(), assorted
      cleanups and fixes from various people, etc.
      One piece probably deserves special mention - Neil's
      lookup_one_len_unlocked().  Similar to lookup_one_len(), but gets
      called without ->i_mutex and tries to avoid ever taking it.  That, of
      course, means that it's not useful for any directory modifications,
      but things like getting inode attributes in nfds readdirplus are fine
      with that.  I really should've asked for moratorium on lookup-related
      changes this cycle, but since I hadn't done that early enough...  I
      *am* asking for that for the coming cycle, though - I'm going to try
      and get conversion of i_mutex to rwsem with ->lookup() done under lock
      taken shared.
      There will be a patch closer to the end of the window, along the lines
      of the one Linus had posted last May - mechanical conversion of
      ->i_mutex accesses to inode_lock()/inode_unlock()/inode_trylock()/
      inode_is_locked()/inode_lock_nested().  To quote Linus back then:
        |    This is an automated patch using
        |        sed 's/mutex_lock(&\(.*\)->i_mutex)/inode_lock(\1)/'
        |        sed 's/mutex_unlock(&\(.*\)->i_mutex)/inode_unlock(\1)/'
        |        sed 's/mutex_lock_nested(&\(.*\)->i_mutex,[     ]*I_MUTEX_\([A-Z0-9_]*\))/inode_lock_nested(\1, I_MUTEX_\2)/'
        |        sed 's/mutex_is_locked(&\(.*\)->i_mutex)/inode_is_locked(\1)/'
        |        sed 's/mutex_trylock(&\(.*\)->i_mutex)/inode_trylock(\1)/'
        |    with a very few manual fixups
      I'm going to send that once the ->i_mutex-affecting stuff in -next
      gets mostly merged (or when Linus says he's about to stop taking
    * 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (63 commits)
      nfsd: don't hold i_mutex over userspace upcalls
      fs:affs:Replace time_t with time64_t
      fs/9p: use fscache mutex rather than spinlock
      proc: add a reschedule point in proc_readfd_common()
      logfs: constify logfs_block_ops structures
      fcntl: allow to set O_DIRECT flag on pipe
      fs: __generic_file_splice_read retry lookup on AOP_TRUNCATED_PAGE
      fs: xattr: Use kvfree()
      [s390] page_to_phys() always returns a multiple of PAGE_SIZE
      nbd: use ->compat_ioctl()
      fs: use block_device name vsprintf helper
      lib/vsprintf: add %*pg format specifier
      fs: use gendisk->disk_name where possible
      poll: plug an unused argument to do_poll
      amdkfd: don't open-code memdup_user()
      cdrom: don't open-code memdup_user()
      rsxx: don't open-code memdup_user()
      mtip32xx: don't open-code memdup_user()
      [um] mconsole: don't open-code memdup_user_nul()
      [um] hostaudio: don't open-code memdup_user()
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