* 'next-devicetree' of git://git.secretlab.ca/git/linux-2.6: (29 commits)
of/flattree: forward declare struct device_node in of_fdt.h
ipmi: explicitly include of_address.h and of_irq.h
sparc: explicitly cast negative phandle checks to s32
powerpc/405: Fix missing #{address,size}-cells in i2c node
powerpc/5200: dts: refactor dts files
powerpc/5200: dts: Change combatible strings on localbus
powerpc/5200: dts: remove unused properties
powerpc/5200: dts: rename nodes to prepare for refactoring dts files
of/flattree: Update dtc to current mainline.
of/device: Don't register disabled devices
powerpc/dts: fix syntax bugs in bluestone.dts
of: Fixes for OF probing on little endian systems
of: make drivers depend on CONFIG_OF instead of CONFIG_PPC_OF
of/flattree: Add of_flat_dt_match() helper function
of_serial: explicitly include of_irq.h
of/flattree: Refactor unflatten_device_tree and add fdt_unflatten_tree
of/flattree: Reorder unflatten_dt_node
of/flattree: Refactor unflatten_dt_node
of/flattree: Add non-boottime device tree functions
of/flattree: Add Kconfig for EARLY_FLATTREE
...
Fix up trivial conflict in arch/sparc/prom/tree_32.c as per Grant.
Remove kobject.h from files which don't need it, notably,
sched.h and fs.h.
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* 'tty-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6: (36 commits)
serial: apbuart: Fixup apbuart_console_init()
TTY: Add tty ioctl to figure device node of the system console.
tty: add 'active' sysfs attribute to tty0 and console device
drivers: serial: apbuart: Handle OF failures gracefully
Serial: Avoid unbalanced IRQ wake disable during resume
tty: fix typos/errors in tty_driver.h comments
pch_uart : fix warnings for 64bit compile
8250: fix uninitialized FIFOs
ip2: fix compiler warning on ip2main_pci_tbl
specialix: fix compiler warning on specialix_pci_tbl
rocket: fix compiler warning on rocket_pci_ids
8250: add a UPIO_DWAPB32 for 32 bit accesses
8250: use container_of() instead of casting
serial: omap-serial: Add support for kernel debugger
serial: fix pch_uart kconfig & build
drivers: char: hvc: add arm JTAG DCC console support
RS485 documentation: add 16C950 UART description
serial: ifx6x60: fix memory leak
serial: ifx6x60: free IRQ on error
Serial: EG20T: add PCH_UART driver
...
Fixed up conflicts in drivers/serial/apbuart.c with evil merge that
makes the code look fairly sane (unlike either side).
RCU free the struct inode. This will allow:
- Subsequent store-free path walking patch. The inode must be consulted for
permissions when walking, so an RCU inode reference is a must.
- sb_inode_list_lock to be moved inside i_lock because sb list walkers who want
to take i_lock no longer need to take sb_inode_list_lock to walk the list in
the first place. This will simplify and optimize locking.
- Could remove some nested trylock loops in dcache code
- Could potentially simplify things a bit in VM land. Do not need to take the
page lock to follow page->mapping.
The downsides of this is the performance cost of using RCU. In a simple
creat/unlink microbenchmark, performance drops by about 10% due to inability to
reuse cache-hot slab objects. As iterations increase and RCU freeing starts
kicking over, this increases to about 20%.
In cases where inode lifetimes are longer (ie. many inodes may be allocated
during the average life span of a single inode), a lot of this cache reuse is
not applicable, so the regression caused by this patch is smaller.
The cache-hot regression could largely be avoided by using SLAB_DESTROY_BY_RCU,
however this adds some complexity to list walking and store-free path walking,
so I prefer to implement this at a later date, if it is shown to be a win in
real situations. I haven't found a regression in any non-micro benchmark so I
doubt it will be a problem.
Signed-off-by: Nick Piggin <npiggin@kernel.dk>
dget_locked was a shortcut to avoid the lazy lru manipulation when we already
held dcache_lock (lru manipulation was relatively cheap at that point).
However, how that the lru lock is an innermost one, we never hold it at any
caller, so the lock cost can now be avoided. We already have well working lazy
dcache LRU, so it should be fine to defer LRU manipulations to scan time.
Signed-off-by: Nick Piggin <npiggin@kernel.dk>
Protect d_unhashed(dentry) condition with d_lock. This means keeping
DCACHE_UNHASHED bit in synch with hash manipulations.
Signed-off-by: Nick Piggin <npiggin@kernel.dk>
Make d_count non-atomic and protect it with d_lock. This allows us to ensure a
0 refcount dentry remains 0 without dcache_lock. It is also fairly natural when
we start protecting many other dentry members with d_lock.
Signed-off-by: Nick Piggin <npiggin@kernel.dk>
This patch creates mpc5200b.dtsi containing the information for the MPC5200b
SoC then modifies all of the dts files for MPC5200b based systems to use
mpc5200b.dtsi.
Signed-off-by: John Bonesio <bones@secretlab.ca>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
This patch changes some incorrect compatible strings on the local plus bus node
in dts files for MPC5200b based systems.
Signed-off-by: John Bonesio <bones@secretlab.ca>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
This patch remove unused properties in dts files in preparation of refactoring
the dts files for MPC5200b based boards.
Signed-off-by: John Bonesio <bones@secretlab.ca>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
This patch renames nodes in dts fils for MPC5200b files to prepare for
refactoring of these files later. When refactoring it will be easier to verify
the results if the node names aren't changing at the same time.
Signed-off-by: John Bonesio <bones@secretlab.ca>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
This patch adds of_flat_dt_match() which tests a node for
compatibility with a list of values and converts the relevant powerpc
platform code to use it. This approach simplifies the board support
code a bit.
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Reviewed-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com>
The device tree code is now in two pieces: some which can be used generically
on any platform which selects CONFIG_OF_FLATTREE, and some early which is used
at boot time on only a few architectures. This patch segregates the early
code so that only those architectures which care about it need compile it.
This also means that some of the requirements in the early code (such as
a cmd_line variable) that most architectures (e.g. X86) don't provide
can be ignored.
Signed-off-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com>
[grant.likely@secretlab.ca: remove extra blank line addition]
[grant.likely@secretlab.ca: fixed incorrect #ifdef CONFIG_EARLY_FLATTREE check]
[grant.likely@secretlab.ca: Made OF_EARLY_FLATTREE select instead of depend
on OF_FLATTREE]
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
This patch changes u32 to __be32 for all "ranges", "prop" and "addr" and
such. Those variables are pointing to the device tree which contains
integers in big endian format.
Most functions are doing it right because of_read_number() is doing the
right thing for them. of_bus_isa_get_flags(), of_bus_pci_get_flags() and
of_bus_isa_map() were accessing the data directly and were doing it wrong.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Modify arch/powerpc/boot/Makefile to use dtc command in
scripts/Makefile.lib
Signed-off-by: Dirk Brandewie <dirk.brandewie@gmail.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Fix build errors like these (from a randconfig and my defconfig for a custom board):
src/arch/powerpc/platforms/52xx/mpc52xx_gpt.c:549: error: dereferencing pointer to incomplete type: 1 errors in 1 logs
src/arch/powerpc/platforms/52xx/mpc52xx_gpt.c:636: error: implicit declaration of function 'nonseekable_open': 1 errors in 1 logs
src/arch/powerpc/platforms/52xx/mpc52xx_gpt.c:657: error: variable 'mpc52xx_wdt_fops' has initializer but incomplete type: 1 errors in 1 logs
src/arch/powerpc/platforms/52xx/mpc52xx_gpt.c:658: error: excess elements in struct initializer: 1 errors in 1 logs
src/arch/powerpc/platforms/52xx/mpc52xx_gpt.c:658: error: unknown field 'owner' specified in initializer: 1 errors in 1 logs
...
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Extend the perf_pmu_register() interface to allow for named and
dynamic pmu types.
Because we need to support the existing static types we cannot use
dynamic types for everything, hence provide a type argument.
If we want to enumerate the PMUs they need a name, provide one.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <20101117222056.259707703@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
PowerPC relies on IRQ-disable to guard against RCU quiecent states,
use the appropriate RCU call version.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
The perf hardware pmu got initialized at various points in the boot,
some before early_initcall() some after (notably arch_initcall).
The problem is that the NMI lockup detector is ran from early_initcall()
and expects the hardware pmu to be present.
Sanitize this by moving all architecture hardware pmu implementations to
initialize at early_initcall() and move the lockup detector to an explicit
initcall right after that.
Cc: paulus <paulus@samba.org>
Cc: davem <davem@davemloft.net>
Cc: Michael Cree <mcree@orcon.net.nz>
Cc: Deng-Cheng Zhu <dengcheng.zhu@gmail.com>
Acked-by: Paul Mundt <lethal@linux-sh.org>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1290707759.2145.119.camel@laptop>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb:
kgdb,ppc: Fix regression in evr register handling
kgdb,x86: fix regression in detach handling
kdb: fix crash when KDB_BASE_CMD_MAX is exceeded
kdb: fix memory leak in kdb_main.c
The commit 5e3d20a remove bkl from startup code so setup_arch() it isn't called
with bkl held anymore. Update the comment on top of that function.
Fix also a typo.
This work was supported by a hardware donation from the CE Linux Forum.
Signed-off-by: Alessio Igor Bogani <abogani@texware.it>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
We were seeing oops like the following when we did an rmmod on a module:
Unable to handle kernel paging request for instruction fetch
Faulting instruction address: 0x8000000000008010
Oops: Kernel access of bad area, sig: 11 [#1]
SMP NR_CPUS=2 P5020 DS
last sysfs file: /sys/devices/qman-portals.2/qman-pool.9/uevent
Modules linked in: qman_tester(-)
NIP: 8000000000008010 LR: c000000000074858 CTR: 8000000000008010
REGS: c00000002e29bab0 TRAP: 0400 Not tainted
(2.6.34.6-00744-g2d21f14)
MSR: 0000000080029000 <EE,ME,CE> CR: 24000448 XER: 00000000
TASK = c00000007a8be600[4987] 'rmmod' THREAD: c00000002e298000 CPU: 1
GPR00: 8000000000008010 c00000002e29bd30 8000000000012798 c00000000035fb28
GPR04: 0000000000000002 0000000000000002 0000000024022428 c000000000009108
GPR08: fffffffffffffffe 800000000000a618 c0000000003c13c8 0000000000000000
GPR12: 0000000022000444 c00000000fffed00 0000000000000000 0000000000000000
GPR16: 00000000100c0000 0000000000000000 00000000100dabc8 0000000010099688
GPR20: 0000000000000000 00000000100cfc28 0000000000000000 0000000010011a44
GPR24: 00000000100017b2 0000000000000000 0000000000000000 0000000000000880
GPR28: c00000000035fb28 800000000000a7b8 c000000000376d80 c0000000003cce50
NIP [8000000000008010] .test_exit+0x0/0x10 [qman_tester]
LR [c000000000074858] .SyS_delete_module+0x1f8/0x2f0
Call Trace:
[c00000002e29bd30] [c0000000000748b4] .SyS_delete_module+0x254/0x2f0 (unreliable)
[c00000002e29be30] [c000000000000580] syscall_exit+0x0/0x2c
Instruction dump:
XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX
38600000 4e800020 60000000 60000000 <4e800020> 60000000 60000000 60000000
---[ end trace 4f57124939a84dc8 ]---
This appears to be due to checking the wrong permission bits in the
instruction_tlb_miss handling if the address that faulted was in vmalloc
space. We need to look at the supervisor execute (_PAGE_BAP_SX) bit and
not the user bit (_PAGE_BAP_UX/_PAGE_EXEC).
Also removed a branch level since it did not appear to be used.
Reported-by: Jeffrey Ladouceur <Jeffrey.Ladouceur@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
In:
powerpc/mm: Fix pgtable cache cleanup with CONFIG_PPC_SUBPAGE_PROT
commit d28513bc7f
Author: David Gibson <david@gibson.dropbear.id.au>
subpage_protection() was changed to to take an mm rather a pgdir but it
didn't change calling site in hashpage_preload(). The change wasn't
noticed at compile time since hashpage_preload() used a void* as the
parameter to subpage_protection().
This is obviously wrong and can trigger the following crash when
CONFIG_SLAB, CONFIG_DEBUG_SLAB, CONFIG_PPC_64K_PAGES
CONFIG_PPC_SUBPAGE_PROT are enabled.
Freeing unused kernel memory: 704k freed
Unable to handle kernel paging request for data at address 0x6b6b6b6b6b6c49b7
Faulting instruction address: 0xc0000000000410f4
cpu 0x2: Vector: 300 (Data Access) at [c00000004233f590]
pc: c0000000000410f4: .hash_preload+0x258/0x338
lr: c000000000041054: .hash_preload+0x1b8/0x338
sp: c00000004233f810
msr: 8000000000009032
dar: 6b6b6b6b6b6c49b7
dsisr: 40000000
current = 0xc00000007e2c0070
paca = 0xc000000007fe0500
pid = 1, comm = init
enter ? for help
[c00000004233f810] c000000000041020 .hash_preload+0x184/0x338 (unreliable)
[c00000004233f8f0] c00000000003ed98 .update_mmu_cache+0xb0/0xd0
[c00000004233f990] c000000000157754 .__do_fault+0x48c/0x5dc
[c00000004233faa0] c000000000158fd0 .handle_mm_fault+0x508/0xa8c
[c00000004233fb90] c0000000006acdd4 .do_page_fault+0x428/0x6ac
[c00000004233fe30] c000000000005260 handle_page_fault+0x20/0x74
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
commit ffe8018c34 of the -mm tree
fixes the initramfs size calculation for e.g. s390 but breaks it
for 32bit architectures which do not define CONFIG_32BIT.
This patch fix the problem for PPC32 which will elsewise end up
with a __initramfs_size of 0.
Signed-off-by: Kerstin Jonsson <kerstin.jonsson@ericsson.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
arch/powerpc/mm/tlb_nohash.c: In function 'setup_initial_memory_limit':
arch/powerpc/mm/tlb_nohash.c:588:29: error: 'ppc64_memblock_base' undeclared (first use in this function)
arch/powerpc/mm/tlb_nohash.c:588:29: note: each undeclared identifier is reported only once for each function it appears in
Due to a copy/paste typo with the following commit:
commit cd3db0c4ca
Author: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: Tue Jul 6 15:39:02 2010 -0700
memblock: Remove rmo_size, burry it in arch/powerpc where it belongs
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
EEH and pci_dlpar #undef DEBUG, but I think they were added before the
ability to control this from Kconfig. It's really annoying to only get
some of the debug messages from these files. Leave the lpar.c #undef
alone as it produces so much output as to make the kernel unusable.
Update the Kconfig text to indicate this particular quirk :)
Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com>
Acked-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
The code is missing a fix that went into the main kernel variant
(we should try to share that code again at some stage)
Reported-by: Albert Cahalan <acahalan@gmail.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Commit ff10b88b5a (kgdb,ppc: Individual
register get/set for ppc) introduced a problem where memcpy was used
incorrectly to read and write the evr registers with a kernel that
has:
CONFIG_FSL_BOOKE=y
CONFIG_SPE=y
CONFIG_KGDB=y
This patch also fixes the following compilation problems:
arch/powerpc/kernel/kgdb.c: In function 'dbg_get_reg':
arch/powerpc/kernel/kgdb.c:341: error: passing argument 2 of 'memcpy' makes pointer from integer without a cast
arch/powerpc/kernel/kgdb.c: In function 'dbg_set_reg':
arch/powerpc/kernel/kgdb.c:366: error: passing argument 1 of 'memcpy' makes pointer from integer without a cast
[jason.wessel@windriver.com: Remove void * casts and fix patch header]
Reported-by: Milton Miller <miltonm@bga.com>
Signed-off-by: Dongdong Deng <dongdong.deng@windriver.com>
Acked-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
CC: linuxppc-dev@lists.ozlabs.org
The big kernel lock has been removed from all these files at some point,
leaving only the #include.
Remove this too as a cleanup.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This was preventing the guest from setting any bits in the
hardware MSR which aren't forced on, such as MSR[SPE].
Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
It is not legal to call mutex_lock() with interrupts disabled.
This will assert with debug checks enabled.
If there's a real need to disable interrupts here, it could be done
after the mutex is acquired -- but I don't see why it's needed at all.
Signed-off-by: Scott Wood <scottwood@freescale.com>
Reviewed-by: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
The VCPU uninit calls some TLB functions, and the TLB uninit function
frees the memory used by them.
Signed-off-by: Scott Wood <scottwood@freescale.com>
Acked-by: Liu Yu <yu.liu@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Fix an unresolved symbol with CONFIG_KVM_GUEST plus CONFIG_RELOCATABLE on
Book E.
Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Structure kvm_ppc_pvinfo is copied to userland with flags and
pad fields unitialized. It leads to leaking of contents of
kernel stack memory.
Signed-off-by: Vasiliy Kulikov <segooon@gmail.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
There are two identical implementations of of_get_mac_address(), one
each in arch/powerpc/kernel/prom_parse.c and
arch/microblaze/kernel/prom_parse.c. Move this function to a new
common file of_net.{c,h} and adjust all the callers to include the new
header.
Signed-off-by: David Daney <ddaney@caviumnetworks.com>
[grant.likely@secretlab.ca: protect header with #ifdef]
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
* git://git.infradead.org/mtd-2.6: (82 commits)
mtd: fix build error in m25p80.c
mtd: Remove redundant mutex from mtd_blkdevs.c
MTD: Fix wrong check register_blkdev return value
Revert "mtd: cleanup Kconfig dependencies"
mtd: cfi_cmdset_0002: make sector erase command variable
mtd: cfi_cmdset_0002: add CFI detection for SST 38VF640x chips
mtd: cfi_util: add support for switching SST 39VF640xB chips into QRY mode
mtd: cfi_cmdset_0001: use defined value of P_ID_INTEL_PERFORMANCE instead of hardcoded one
block2mtd: dubious assignment
P4080/mtd: Fix the freescale lbc issue with 36bit mode
P4080/eLBC: Make Freescale elbc interrupt common to elbc devices
mtd: phram: use KBUILD_MODNAME
mtd: OneNAND: S5PC110: Fix double call suspend & resume function
mtd: nand: fix MTD_MODE_RAW writes
jffs2: use kmemdup
mtd: sm_ftl: cosmetic, use bool when possible
mtd: r852: remove useless pci powerup/down from suspend/resume routines
mtd: blktrans: fix a race vs kthread_stop
mtd: blktrans: kill BKL
mtd: allow to unload the mtdtrans module if its block devices aren't open
...
Fix up trivial whitespace-introduced conflict in drivers/mtd/mtdchar.c
Conflicts:
drivers/mtd/mtd_blkdevs.c
Merge Grant's device-tree bits so that we can apply the subsequent fixes.
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
commit 534af1082329392bc29f6badf815e69ae2ae0f4c(kgdb,kdb: individual
register set and and get API) introduce dbg_get_reg/dbg_set_reg API
for individual register get and set.
This patch implement those APIs for ppc.
Signed-off-by: Dongdong Deng <dongdong.deng@windriver.com>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
* 'kconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6: (38 commits)
kbuild: convert `arch/tile' to the kconfig mainmenu upgrade
README: cite nconfig
Revert "kconfig: Temporarily disable dependency warnings"
kconfig: Use PATH_MAX instead of 128 for path buffer sizes.
kconfig: Fix realloc usage()
kconfig: Propagate const
kconfig: Don't go out from read config loop when you read new symbol
kconfig: fix menuconfig on debian lenny
kbuild: migrate all arch to the kconfig mainmenu upgrade
kconfig: expand file names
kconfig: use the file's name of sourced file
kconfig: constify file name
kconfig: don't emit warning upon rootmenu's prompt redefinition
kconfig: replace KERNELVERSION usage by the mainmenu's prompt
kconfig: delay gconf window initialization
kconfig: expand by default the rootmenu's prompt
kconfig: add a symbol string expansion helper
kconfig: regen parser
kconfig: implement the `mainmenu' directive
kconfig: allow PACKAGE to be defined on the compiler's command-line
...
Fix up trivial conflict in arch/mn10300/Kconfig
