btrfs: sanitizing ->fs_info, part 3

move assignments to ->fs_info in open_ctree() up, to the place
just after the original allocations.  Assignment for tree_root
becomes a no-op - we'd obtained fs_info from tree_root->fs_info
in the first place.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
btrfs: sanitizing ->fs_info, part 4

A new helper: btrfs_alloc_root(fs_info); allocates btrfs_root
and sets ->fs_info.  All places allocating the suckers converted
to it.  At that point we *never* reassign ->fs_info of btrfs_root;
it's set before anyone sees the address of newly allocated
struct btrfs_root and never assigned anywhere else.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
btrfs: sanitizing ->fs_info, part 5

close_ctree() uses a weird mix of accesses to root->fs_info and
its value at the beginning of function stored in local variable.
Since ->fs_info *never* changes, let's just use the local variable
to avoid confusion.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
btrfs: make open_ctree() return int

It returns either ERR_PTR(-ve) or sb->s_fs_info.  The latter can
be found by caller just as well, TYVM, no need to return it.  Just
return -ve or 0...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
btrfs: kill pointless reassignment of ->s_fs_info in btrfs_fill_super()

We do not (fortunately) modify ->s_fs_info of superblock on the fly in
btrfs_fill_super(); apparent assignment is a no-op.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
btrfs: merge free_fs_info() calls on fill_super failures

... all the way up into btrfs_mount().

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
btrfs: make free_fs_info() call ->kill_sb() unconditional

... and don't bother with it after btrfs_fill_super() failure -
->kill_sb() (unlike ->put_super()) will be called even if we
have not got non-NULL ->s_root.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
btrfs: consolidate failure exits in btrfs_mount() a bit

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
btrfs: let ->s_fs_info point to fs_info, not root...

the latter can be obtained from the former (by looking as ->tree_root)
just as cheaply as we currently are doing the other way round.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
btrfs: take allocation of ->tree_root into open_ctree()

now that we don't need it for sget() anymore...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux into rmobile-latest

Conflicts:
	arch/arm/mach-shmobile/Makefile

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Merge branches 'common/pfc' and 'common/clkfwk' into rmobile/marzen

Conflicts:
	arch/arm/mach-shmobile/clock-sh73a0.c

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
ARM: mach-shmobile: r8a7779 and Marzen base support V2

Initial support for the r8a7779 SoC and the Marzen board (V2).

Only SCIF ports and the TMU are supported at this point.

To keep things simple only entity-mapped virt-to-phys mappings
are supported. This forces drivers and other SoC glue code to
make use of ioremap(). We cannot support early serial console
due to virtual address space collisions with the ARM kernel.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Merge branch 'next' into for-linus

Conflicts:
	security/integrity/evm/evm_crypto.c

Resolved upstream fix vs. next conflict manually.

Signed-off-by: James Morris <jmorris@namei.org>
ARM: mach-shmobile: r8a7779 PFC GPIO-only support V2

Add GPIO-only r8a7779 PFC support V2.

Only regular GPIOs are supported at this time. GPIO_FN are not
supported because they require variable bit width support in be
the shared pfc code.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
ARM: mach-shmobile: Marzen SCIF2/SCIF4 support

Add SCIF2 and SCIF4 pin configuration code to
the r8a7779 Marzen board.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
ARM: mach-shmobile: Marzen LAN89218 support

Add LAN89218 support to the r8a7779 Marzen board.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
ARM: mach-shmobile: clock-r8a7779: add DIV4 clock support

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
ARM: mach-shmobile: clock-r8a7779: clkz/clkzs support

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
ARM: mach-shmobile: Fix headsmp.S code to use CPUINIT

Convert the low level SMP assembly code for SH-Mobile ARM
from using the INIT to the CPUINIT section. This unbreaks
onlining of CPUs using the CPU hotplug interface:

echo 1 > /sys/devices/system/cpu/cpu1/online

Without this fix the reset vector code used by CPU hotplug
will be freed as init section data and CPU cores cannot
be brought online.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>