isofs: Remove global fs lock

sbi->s_mutex isn't needed for isofs at all so we can just remove it. Generally,
since isofs is always mounted read-only, filesystem structure cannot change
under us. So

isofs: Remove global fs lock

sbi->s_mutex isn't needed for isofs at all so we can just remove it. Generally,
since isofs is always mounted read-only, filesystem structure cannot change
under us. So buffer_head contents stays constant after it's filled in. That
leaves us with possible changes of global data structures. Superblock changes
only during filesystem mount (even remount does not change it), inodes are only
filled in during reading from disk. So there are no changes of these structures
to bother about.

Arguments why sbi->s_mutex can be removed at each place:
isofs_readdir: Accesses sb, inode, filp, local variables => s_mutex not needed
isofs_lookup: Protected by directory's i_mutex. Accesses sb, inode, dentry,
local variables => s_mutex not needed
rock_ridge_symlink_readpage: Protected by page lock. Accesses sb, inode,
local variables => s_mutex not needed.

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

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make d_splice_alias(ERR_PTR(err), dentry) = ERR_PTR(err)

... and simplify the living hell out of callers

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

Merge tag 'v2.6.39-rc7'

in order to pull in changes in drivers/media/dvb/firewire/ and
sound/firewire/.

Merge branch 'next' into for-linus

Merge commit 'v2.6.38-rc1' into kbuild/packaging

Merge branch 'master'; commit 'v2.6.38-rc7' into next

Merge commit 'v2.6.38-rc6' into for-2.6.39/core

Conflicts:
block/cfq-iosched.c

Signed-off-by: Jens Axboe <jaxboe@fusionio.com>

Merge remote-tracking branch 'airlied/drm-core-next' into drm-nouveau-next

Merge branch 'devicetree/for-x86' of git://git.secretlab.ca/git/linux-2.6 into x86/platform

Reason: x86 devicetree support for ce4100 depends on those device tree
changes scheduled for .39.

Signed

Merge branch 'devicetree/for-x86' of git://git.secretlab.ca/git/linux-2.6 into x86/platform

Reason: x86 devicetree support for ce4100 depends on those device tree
changes scheduled for .39.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

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Merge branch 'linus' into x86/bootmem

Conflicts:
arch/x86/mm/numa_64.c

Merge reason: fix the conflict, update to latest -rc and pick up this
dependent fix from Yinghai:

e6d2e2b2b1

Merge branch 'linus' into x86/bootmem

Conflicts:
arch/x86/mm/numa_64.c

Merge reason: fix the conflict, update to latest -rc and pick up this
dependent fix from Yinghai:

e6d2e2b2b1e1: memblock: don't adjust size in memblock_find_base()

Signed-off-by: Ingo Molnar <mingo@elte.hu>

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Merge commit 'v2.6.38-rc3' into next

Merge commit 'v2.6.38-rc2' into core/locking

Reason: Update to mainline before adding the locking cleanup

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

Merge branches 'sh/wdt', 'sh/pci-express-async' and 'common/serial-rework' into sh-latest

Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6

Merge branch 'master' of /repos/git/net-next-2.6

Merge branch 'for-2.6.38' into for-2.6.39

Merge branch 'master' of /pub/scm/linux/kernel/git/jejb/scsi-post-merge-2.6 into for-linus

Merge branch 'devicetree/next' into spi/next

Merge branch 'master' of git://1984.lsi.us.es/net-next-2.6

Conflicts:
net/ipv4/route.c

Signed-off-by: Patrick McHardy <kaber@trash.net>

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: (41 commits)
fs: add documentati

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: (41 commits)
fs: add documentation on fallocate hole punching
Gfs2: fail if we try to use hole punch
Btrfs: fail if we try to use hole punch
Ext4: fail if we try to use hole punch
Ocfs2: handle hole punching via fallocate properly
XFS: handle hole punching via fallocate properly
fs: add hole punching to fallocate
vfs: pass struct file to do_truncate on O_TRUNC opens (try #2)
fix signedness mess in rw_verify_area() on 64bit architectures
fs: fix kernel-doc for dcache::prepend_path
fs: fix kernel-doc for dcache::d_validate
sanitize ecryptfs ->mount()
switch afs
move internal-only parts of ncpfs headers to fs/ncpfs
switch ncpfs
switch 9p
pass default dentry_operations to mount_pseudo()
switch hostfs
switch affs
switch configfs
...

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Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6 into common/serial-rework

Conflicts:
arch/sh/kernel/cpu/sh2/setup-sh7619.c
arch/sh/kernel/cpu/sh2a/setup-mxg

Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6 into common/serial-rework

Conflicts:
arch/sh/kernel/cpu/sh2/setup-sh7619.c
arch/sh/kernel/cpu/sh2a/setup-mxg.c
arch/sh/kernel/cpu/sh2a/setup-sh7201.c
arch/sh/kernel/cpu/sh2a/setup-sh7203.c
arch/sh/kernel/cpu/sh2a/setup-sh7206.c
arch/sh/kernel/cpu/sh3/setup-sh7705.c
arch/sh/kernel/cpu/sh3/setup-sh770x.c
arch/sh/kernel/cpu/sh3/setup-sh7710.c
arch/sh/kernel/cpu/sh3/setup-sh7720.c
arch/sh/kernel/cpu/sh4/setup-sh4-202.c
arch/sh/kernel/cpu/sh4/setup-sh7750.c
arch/sh/kernel/cpu/sh4/setup-sh7760.c
arch/sh/kernel/cpu/sh4a/setup-sh7343.c
arch/sh/kernel/cpu/sh4a/setup-sh7366.c
arch/sh/kernel/cpu/sh4a/setup-sh7722.c
arch/sh/kernel/cpu/sh4a/setup-sh7723.c
arch/sh/kernel/cpu/sh4a/setup-sh7724.c
arch/sh/kernel/cpu/sh4a/setup-sh7763.c
arch/sh/kernel/cpu/sh4a/setup-sh7770.c
arch/sh/kernel/cpu/sh4a/setup-sh7780.c
arch/sh/kernel/cpu/sh4a/setup-sh7785.c
arch/sh/kernel/cpu/sh4a/setup-sh7786.c
arch/sh/kernel/cpu/sh4a/setup-shx3.c
arch/sh/kernel/cpu/sh5/setup-sh5.c
drivers/serial/sh-sci.c
drivers/serial/sh-sci.h
include/linux/serial_sci.h

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Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6 into HEAD

fix isofs d_op handling

switch to ->s_d_op; d_obtain_alias() will DTRT now

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

Merge branch 'linus' into idle-test

Merge branches 'sh/memchunk' and 'common/mmcif' into sh-latest