GitLab

Remove last unneeded bit of BKL from knfsd

Remove BKL from nfsservctl systemcall.  All
components have their own locking.
Also remove it from the body of nfsd threads.  Keep
it for final thread destruction though.

Tidy up locking in nfssvc - preparing for BKL removal

- nfsd_busy becomes atomic_t
- nfsd_call_lock created to protect timing of calls and stats gathering
- lock_kernel around thread creation and destruction.  It is
  sufficiently uncommon that it doesn't really need a lock of it's
  own.  It is currently under the BKL because all of the nfsservctl
  syscall is, but that is about to be removed so we preserve BKL here.

Change export table lock to (SMP safe) rwsemaphore

As a first step to removing the BKL from nfsd, this patch
changes the lock used for the export table to be a rwsem semaphore.
Previously it had the same functionality but depended on the BKL
for correctness.

As there is no "down_write_interruptible" this patch removes the
posibility of interrupting the write_lock request, but this should
never be needed anyway.

Big bits first, I'll redo the smaller bits tomorrow after some sleep.
Same as last time, rediffed against pre5

- Patrick Mochel: initcall levels
- Patrick Mochel: devicefs updates, add PCI devices into the hierarchy
- Denis Oliver Kropp: neomagic fb driver
- David Miller: sparc64 and network updates
- Kai Mäkisara: scsi tape update
- Al Viro: more inode trimming, VFS cleanup
- Greg KH: USB update - proper urb allocations
- Eric Raymond: kdev_t updates for fb devices

  - Al Viro: mnt_list init
  - Jeff Garzik: network driver update (license tags, tulip driver)
  - David Miller: sparc, net updates
  - Ben Collins: firewire update
  - Gerd Knorr: btaudio/bttv update
  - Tim Hockin: MD cleanups
  - Greg KH, Petko Manolov: USB updates
  - Leonard Zubkoff: DAC960 driver update

  - Manfred Spraul: /proc/pid/maps cleanup (and bugfix for non-x86)
  - Al Viro: "block device fs" - cleanup of page cache handling
  - Hugh Dickins: VM/shmem cleanups and swap search speedup
  - David Miller: sparc updates, soc driver typo fix, net updates
  - Jeff Garzik: network driver updates (dl2k, yellowfin and tulip)
  - Neil Brown: knfsd cleanups and fixues
  - Ben LaHaise: zap_page_range merge from -ac

  - Alan Cox: continued merging
  - Mingming Cao: make msgrcv/shmat check the queue/segment ID's properly
  - Greg KH: USB serial init failure fix, Xircom serial converter driver
  - Neil Brown: nsfd/raid/md/lockd cleanups
  - Ingo Molnar: multipath RAID personality, raid xor update
  - Hugh Dickins/Marcelo Tosatti: swapin read-ahead race fix
  - Vojtech Pavlik: fix up some of the infrastructure for x86-64
  - Robert Love: AMD 761 AGP GART support
  - Jens Axboe: fix SCSI-generic queue handling race
  - me: be sane about page reference bits

  - Russell King: ARM updates
  - Al Viro: more init cleanups
  - Cort Dougan: more PPC updates
  - David Miller: cleanups, pci mmap updates
  - Neil Brown: raid resync by sector
  - Alan Cox: more merging with -ac
  - Johannes Erdfelt: USB updates
  - Kai Germaschewski: ISDN updates
  - Tobias Ringstrom: dmfe.c network driver update
  - Trond Myklebust: NFS client updates and cleanups

  - Rik van Riel and others: mm rw-semaphore (ps/top ok when swapping)
  - IDE: 256 sectors at a time is legal, but apparently confuses some
  drives. Max out at 255 sectors instead.
  - Petko Manolov: USB pegasus driver update
  - make the boottime memory map printout at least almost readable.
  - USB driver updates
  - pte_alloc()/pmd_alloc() need page_table_lock.

  - Jens: better ordering of requests when unable to merge
  - Neil Brown: make md work as a module again (we cannot autodetect
  in modules, not enough background information)
  - Neil Brown: raid5 SMP locking cleanups
  - Neil Brown: nfsd: handle Irix NFS clients named pipe behavior and
  dentry leak fix
  - maestro3 shutdown fix
  - fix dcache hash calculation that could cause bad hashes under certain
  circumstances (Dean Gaudet)
  - David Miller: networking and sparc updates
  - Jeff Garzik: include file cleanups
  - Andy Grover: ACPI update
  - Coda-fs error return fixes
  - rth: alpha Jensen update