Now cleanup_highmap actually is in two steps: one is early in head64.c
and only clears above _end; a second one is in init_memory_mapping() and
tries to clean from _brk_end to _end.
It should check if those boundaries are PMD_SIZE aligned but currently
does not.
Also init_memory_mapping() is called several times for numa or memory
hotplug, so we really should not handle initial kernel mappings there.
This patch moves cleanup_highmap() down after _brk_end is settled so
we can do everything in one step.
Also we honor max_pfn_mapped in the implementation of cleanup_highmap.
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
LKML-Reference: <alpine.DEB.2.00.1103171739050.3382@kaball-desktop>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Add missing function parameters for yield_to():
Warning(kernel/sched.c:5470): No description found for parameter 'p'
Warning(kernel/sched.c:5470): No description found for parameter 'preempt'
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Peter Zijlstra <peterz@infradead.org>
LKML-Reference: <20110318093453.8f7489a4.randy.dunlap@oracle.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
The following patch solves the problems introduced by Robert's
commit 41bf498 and reported by Arun Sharma. This commit gets rid
of the base + index notation for reading and writing PMU msrs.
The problem is that for fixed counters, the new calculation for
the base did not take into account the fixed counter indexes,
thus all fixed counters were read/written from fixed counter 0.
Although all fixed counters share the same config MSR, they each
have their own counter register.
Without:
$ task -e unhalted_core_cycles -e instructions_retired -e baclears noploop 1 noploop for 1 seconds
242202299 unhalted_core_cycles (0.00% scaling, ena=1000790892, run=1000790892)
2389685946 instructions_retired (0.00% scaling, ena=1000790892, run=1000790892)
49473 baclears (0.00% scaling, ena=1000790892, run=1000790892)
With:
$ task -e unhalted_core_cycles -e instructions_retired -e baclears noploop 1 noploop for 1 seconds
2392703238 unhalted_core_cycles (0.00% scaling, ena=1000840809, run=1000840809)
2389793744 instructions_retired (0.00% scaling, ena=1000840809, run=1000840809)
47863 baclears (0.00% scaling, ena=1000840809, run=1000840809)
Signed-off-by: Stephane Eranian <eranian@google.com>
Cc: peterz@infradead.org
Cc: ming.m.lin@intel.com
Cc: robert.richter@amd.com
Cc: asharma@fb.com
Cc: perfmon2-devel@lists.sf.net
LKML-Reference: <20110319172005.GB4978@quad>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
"disk" is always NULL when we goto out. There was a check for this
before, but it was removed in 69e02c59a7 "block: Don't check events
while open is in progress".
Signed-off-by: Dan Carpenter <error27@gmail.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@carl>
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ryusuke/nilfs2:
nilfs2: move NILFS_SUPER_MAGIC to linux/magic.h
nilfs2: get rid of nilfs_sb_info structure
nilfs2: use sb instance instead of nilfs_sb_info struct
nilfs2: get rid of sc_sbi back pointer
nilfs2: move log writer onto nilfs object
nilfs2: move next generation counter into nilfs object
nilfs2: move s_inode_lock and s_dirty_files into nilfs object
nilfs2: move parameters on nilfs_sb_info into nilfs object
nilfs2: move mount options to nilfs object
nilfs2: record used amount of each checkpoint in checkpoint list
nilfs2: optimize rec_len functions
nilfs2: append blocksize info to warnings during loading super blocks
nilfs2: add compat ioctl
nilfs2: implement FS_IOC_GETFLAGS/SETFLAGS/GETVERSION
nilfs2: tighten restrictions on inode flags
nilfs2: mark S_NOATIME on inodes only if NOATIME attribute is set
nilfs2: use common file attribute macros
nilfs2: add free entries count only if clear bit operation succeeded
nilfs2: decrement inodes count only if raw inode was successfully deleted
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc: (53 commits)
mmc: dw_mmc: support mmc power control with regulator
mmc: dw_mmc: fix suspend/resume operation
mmc: dw_mmc: add quirks for unreliable card detect, and capabilities
mmc: tmio: fix address in kunmap_atomic() calls
mmc: core: reset card voltage after power off
mmc: core: export function mmc_do_release_host()
mmc: sdio: remember new card RCA when redetecting card
mmc: dw_mmc: Remove set-but-unused variable.
mmc: sdhci-esdhc-imx: add card detect on custom GPIO for mx25/35
mmc: sdhci-esdhc: broken card detection is not a default quirk
mmc: sdhci-esdhc-imx: add write protect on custom GPIO on mx25/35
mmc: msm_sdcc: remove needless cache flush after dma_unmap_sg()
mmc: sh_mmcif: support aggressive clock gating
mmc: check if mmc cards < 2GB do sector addressing
mmc: core: comment on why sdio_reset is done at init time
mmc: dw_mmc: support DDR mode
mmc: via-sdmmc: Remove set-but-unused variable.
mmc: cb710: Return err value in cb710_wait_while_busy()
mmc: sdhci-pci: Remove set-but-unused variable.
mmc: mxs-mmc: add mmc host driver for i.MX23/28
...
* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-2.6-mn10300:
MN10300: Clear ASB2364 peripheral interrupt masks before enabling interrupts
MN10300: Fix the ASB2364 gdbport UART register defs
MN10300: Fix ASB2364 FPGA register defs
MN10300: Select GENERIC_HARDIRQS_NO_DEPRECATED
MN10300: Select HAVE_GENERIC_HARDIRQS rather than GENERIC_HARDIRQS
MN10300: Convert ASB2364 FPGA irq_chip to new functions
MN10300: Convert ipi irq_chip to new functions
MN10300: Convert serial irq_chip to new functions
MN10300: Convert cpu irq_chips to new functions
MN10300: Remove unused mn10300_intc_* functions
MN10300: Remove stale irq_chip.end - V2
MN10300: Use clockevents_calc_mult_shift()
MN10300: Use clocksource_register_hz()
MN10300: Remove stale code
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/vapier/blackfin: (32 commits)
Blackfin: ip0x: fix unused variable warning
Blackfin: punt unused HDMA masks
Blackfin: wire up new syscalls
Blackfin/ipipe: restore pipeline bits in irqflags
Blackfin/ipipe: fix deferred pipeline sync for the root stage
Blackfin/ipipe: upgrade to I-pipe mainline
Blackfin: cpufreq: fix typos
Blackfin: enable GENERIC_HARDIRQS_NO_DEPRECATED
Blackfin: SMP: convert to irq chip functions
Blackfin: use accessor functions in show_interrupts()
Blackfin: use proper wrapper functions for modifying irq status
Blackfin: convert gpio irq_chip to new functions
Blackfin: convert mac irq_chip to new functions
Blackfin: convert error irq_chip to new functions
Blackfin: convert internal irq_chip to new functions
Blackfin: convert core irq_chip to new functions
Blackfin: use proper wrappers for irq_desc
Blackfin: optimize startup code
Blackfin: SMP: work around anomaly 05000491
Blackfin: SMP: implement cpu_freq support
...
The calculation is off-by-one. It should be "end - start + 1". This
patch fixes it to use resource_size() instead. Oddly, the code already
uses resource size correctly a couple lines earlier when it calls
request_mem_region() for this memory.
Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Currently only OMAP4 supports hwspinlocks, so don't bother asking
anyone else.
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Commit db97eb7dfe
(omap: gpmc: enable irq mode in gpmc) enabled interrupts for
GPMC (General Purpose Memory Controller). However, looks like
this patch only works on omap3. Fix the issues to avoid warnings
on omap4 during the boot.
GPMC: number of chip select is 8, CS0 to CS7. One less IRQ
allocated throws below warning at boot:
[ 0.429290] Trying to install type control for IRQ409
[ 0.429290] Trying to set irq flags for IRQ409
Resolve following warning messages in boot when irq chip is not set:
[ 0.429229] Trying to install interrupt handler for IRQ402
[ 0.429229] Trying to install interrupt handler for IRQ403
[ 0.429229] Trying to install interrupt handler for IRQ404
[ 0.429260] Trying to install interrupt handler for IRQ405
[ 0.429260] Trying to install interrupt handler for IRQ406
[ 0.429260] Trying to install interrupt handler for IRQ407
[ 0.429290] Trying to install interrupt handler for IRQ408
Resolve following warning in OMAP4:
[ 0.429290] gpmc: irq-20 could not claim: err -22
Signed-off-by: Balaji T K <balajitk@ti.com>
[tony@atomide.com: combined patches into one, updated comments]
Signed-off-by: Tony Lindgren <tony@atomide.com>
the pandaboard does not use the VUSIM or VAUX1 power regulators on the TWL6030
and are left floating. if the VUSIM and VAUX1 power regulators are initilized,
noise on the unloaded regulators generates an overcurrent interrupt causing the
system to power down. this patch removes the initialization of the unused power
regulators of VUSIM and VAUX1.
Signed-off-by: David Anders <x0132446@ti.com>
Acked-by: Andy Green <andy.green@linaro.org>
Acked-by: Anand Gadiyar <gadiyar@ti.com>
Tested-by: Kevin Hilman <khilman@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
The handler function may be called from the point it is registered.
Since the handler inspects IRQ numbers, we must set them up before
registration.
Signed-off-by: Aaro Koskinen <aaro.koskinen@nokia.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Fix the return value for the successful case.
Signed-off-by: Aaro Koskinen <aaro.koskinen@nokia.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Similarly to irq_of_parse_and_map(), find the platform_device
object and return the pre-computed resource.
Signed-off-by: David S. Miller <davem@davemloft.net>
ACPI uses a sysdev class and a sysdev for executing
irqrouter_resume() before turning on interrupts on the boot CPU.
However, since irqrouter_resume() ignores its argument, the entire
mechanism may be replaced with a struct syscore_ops object which
is considerably simpler.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Len Brown <len.brown@intel.com>
The ACPI EC driver defines a sysdev class, but it doesn't use it, so
it can be removed.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Len Brown <len.brown@intel.com>
Now that we finally have __aligned_xx exported to userspace, convert
the headers that get exported over to the proper type.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Whenever we enter the IP stack proper from bridge netfilter we
need to ensure that the skb is in a form the IP stack expects
it to be in.
The entry point on NF_FORWARD did not meet the requirements of
the IP stack, therefore leading to potential crashes/panics.
This patch fixes the problem.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Commit c95b819ad7 (gre: Use needed_headroom)
made gre use needed_headroom instead of hard_header_len
This uncover a bug in vlan code.
We should make sure vlan devices take into account their
real_dev->needed_headroom or we risk a crash in ipgre_header(), because
we dont have enough room to push IP header in skb.
Reported-by: Diddi Oscarsson <diddi@diddi.se>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Patrick McHardy <kaber@trash.net>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
This structure was accidentally defined such that its layout can
differ between 32-bit and 64-bit processes. Add compat structure
definitions and an ioctl wrapper function.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Acked-by: Alexander Duyck <alexander.h.duyck@intel.com>
Cc: stable@kernel.org [2.6.30+]
Signed-off-by: David S. Miller <davem@davemloft.net>
__ethtool_set_sg does not check if dev->ethtool_ops->set_sg is defined
which can result in a NULL pointer dereference when ethtool is used to
change SG settings for drivers without SG support.
Signed-off-by: Roger Luethi <rl@hellgate.ch>
Reviewed-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
struct aunhdr has 4 padding bytes between 'pad' and 'handle' fields on
x86_64. These bytes are not initialized in the variable 'ah' before
sending 'ah' to the network. This leads to 4 bytes kernel stack
infoleak.
This bug was introduced before the git epoch.
Signed-off-by: Vasiliy Kulikov <segoon@openwall.com>
Acked-by: Phil Blundell <philb@gnu.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
As specified by errata eTSEC49 of MPC8548 and errata eTSEC12 of MPC83xx,
older revisions of gianfar controllers will be unable to calculate a TCP/UDP
packet checksum for some alignments of the appropriate FCB. This patch checks
for FCB alignment on such controllers and falls back to software checksumming
if the alignment is known to be bad.
Signed-off-by: Alex Dubov <oakad@yahoo.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
USB defines usb_device_type pointing to usb_device_pm_ops that
provides system-wide PM callbacks only and usb_bus_type pointing to
usb_bus_pm_ops that provides runtime PM callbacks only. However,
the USB runtime PM callbacks may be defined in usb_device_pm_ops
which makes it possible to drop usb_bus_pm_ops and will allow us
to consolidate the handling of subsystems by the PM core code.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
* 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6:
PCI: label: remove #include of ACPI header to avoid warnings
PCI: label: Fix compilation error when CONFIG_ACPI is unset
PCI: pre-allocate additional resources to devices only after successful allocation of essential resources.
PCI: introduce reset_resource()
PCI: data structure agnostic free list function
PCI: refactor io size calculation code
PCI: do not create quirk I/O regions below PCIBIOS_MIN_IO for ICH
PCI hotplug: acpiphp: set current_state to D0 in register_slot
PCI: Export ACPI _DSM provided firmware instance number and string name to sysfs
PCI: add more checking to ICH region quirks
PCI: aer-inject: Override PCIe AER Mask Registers
PCI: fix tlan build when CONFIG_PCI is not enabled
PCI: remove quirk for pre-production systems
PCI: Avoid potential NULL pointer dereference in pci_scan_bridge
PCI/lpc: irq and pci_ids patch for Intel DH89xxCC DeviceIDs
PCI: sysfs: Fix failure path for addition of "vpd" attribute
* 'spi/next' of git://git.secretlab.ca/git/linux-2.6: (34 commits)
spi/dw_spi: move dw_spi.h into drivers/spi
spi/dw_spi: Fix missing header
gpio/langwell: Clear edge bit before handling
gpio/langwell: Simplify demux loop
gpio/langwell: Convert irq name space
gpio/langwell: Fix broken irq_eoi change.
gpio; Make Intel chipset gpio drivers depend on x86
gpio/cs5535-gpio: Fix section mismatch
spi/rtc-{ds1390,ds3234,m41t94}: Use spi_get_drvdata() for SPI devices
spi/davinci: Support DMA transfers larger than 65535 words
spi/davinci: Use correct length parameter to dma_map_single calls
gpio: Use __devexit at necessary places
gpio: add MODULE_DEVICE_TABLE to pch_gpio and ml_ioh_gpio
gpio/mcp23s08: support mcp23s17 variant
of_mmc_spi: add card detect irq support
spi/omap_mcspi: catch xfers of non-multiple SPI word size
spi/omap_mcspi: Off-by-one error in finding the right divisor
gpio/pca953x: Fix wrong pointer type
spi/pl022: rid dangling labels
spi: add support for SuperH SPI
...
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/dlm:
dlm: use alloc_workqueue function
dlm: increase default hash table sizes
dlm: record full callback state
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6:
fs: call security_d_instantiate in d_obtain_alias V2
lose 'mounting_here' argument in ->d_manage()
don't pass 'mounting_here' flag to follow_down()
change the locking order for namespace_sem
fix deadlock in pivot_root()
vfs: split off vfsmount-related parts of vfs_kern_mount()
Some fixes for pstore
kill simple_set_mnt()
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/bcopeland/omfs:
omfs: make readdir stop when filldir says so
omfs: merge unlink() and rmdir(), close leak in rename()
omfs: stop playing silly buggers with omfs_unlink() in ->rename()
omfs: rename() needs to mark old_inode dirty after ctime update
* 'linux-next' of git://git.infradead.org/ubifs-2.6: (25 commits)
UBIFS: clean-up commentaries
UBIFS: save 128KiB or more RAM
UBIFS: allocate orphans scan buffer on demand
UBIFS: allocate lpt dump buffer on demand
UBIFS: allocate ltab checking buffer on demand
UBIFS: allocate scanning buffer on demand
UBIFS: allocate dump buffer on demand
UBIFS: do not check data crc by default
UBIFS: simplify UBIFS Kconfig menu
UBIFS: print max. index node size
UBIFS: handle allocation failures in UBIFS write path
UBIFS: use max_write_size during recovery
UBIFS: use max_write_size for write-buffers
UBIFS: introduce write-buffer size field
UBI: incorporate LEB offset information
UBIFS: incorporate maximum write size
UBI: provide LEB offset information
UBI: incorporate maximum write size
UBIFS: fix LEB number in printk
UBIFS: restrict world-writable debugfs files
...
* 'linux-next' of git://git.infradead.org/ubi-2.6:
UBI: make tests modes dynamic
UBI: make self-checks dynamic
UBI: make debugging messages dynamic
UBI: remove UBI_IO_DEBUG macro
UBI: kill debugging buffer
UBI: allocate erase checking buffer on demand
UBI: allocate write checking buffer on demand
UBI: always re-read in case of read failures
UBI: cleanup comments about corrupted PEBs
UBI: add slab cache for ubi_scan_leb objects
UBI: use raw mtd read function in debugging code
UBI: try to reveal buggy MTD drivers
UBI: add a commentary about allocating VID header buffer on stack
UBI: cleanup LEB start calculations
UBI: fix NOR erase preparation quirk
* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
x86: Flush TLB if PGD entry is changed in i386 PAE mode
x86, dumpstack: Correct stack dump info when frame pointer is available
x86: Clean up csum-copy_64.S a bit
x86: Fix common misspellings
x86: Fix misspelling and align params
x86: Use PentiumPro-optimized partial_csum() on VIA C7
* 'irq-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
genirq: Fix incorrect unlock in __setup_irq()
cris: Use generic show_interrupts()
genirq: show_interrupts: Check desc->name before printing it blindly
cris: Use accessor functions to set IRQ_PER_CPU flag
cris: Fix irq conversion fallout
* 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
sched, kernel-doc: Fix runqueue_is_locked() description
* 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (30 commits)
trace, filters: Initialize the match variable in process_ops() properly
trace, documentation: Fix branch profiling location in debugfs
oprofile, s390: Cleanups
oprofile, s390: Remove hwsampler_files.c and merge it into init.c
perf: Fix tear-down of inherited group events
perf: Reorder & optimize perf_event_context to remove alignment padding on 64 bit builds
perf: Handle stopped state with tracepoints
perf: Fix the software events state check
perf, powerpc: Handle events that raise an exception without overflowing
perf, x86: Use INTEL_*_CONSTRAINT() for all PEBS event constraints
perf, x86: Clean up SandyBridge PEBS events
perf lock: Fix sorting by wait_min
perf tools: Version incorrect with some versions of grep
perf evlist: New command to list the names of events present in a perf.data file
perf script: Add support for H/W and S/W events
perf script: Add support for dumping symbols
perf script: Support custom field selection for output
perf script: Move printing of 'common' data from print_event and rename
perf tracing: Remove print_graph_cpu and print_graph_proc from trace-event-parse
perf script: Change process_event prototype
...
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (47 commits)
doc: CONFIG_UNEVICTABLE_LRU doesn't exist anymore
Update cpuset info & webiste for cgroups
dcdbas: force SMI to happen when expected
arch/arm/Kconfig: remove one to many l's in the word.
asm-generic/user.h: Fix spelling in comment
drm: fix printk typo 'sracth'
Remove one to many n's in a word
Documentation/filesystems/romfs.txt: fixing link to genromfs
drivers:scsi Change printk typo initate -> initiate
serial, pch uart: Remove duplicate inclusion of linux/pci.h header
fs/eventpoll.c: fix spelling
mm: Fix out-of-date comments which refers non-existent functions
drm: Fix printk typo 'failled'
coh901318.c: Change initate to initiate.
mbox-db5500.c Change initate to initiate.
edac: correct i82975x error-info reported
edac: correct i82975x mci initialisation
edac: correct commented info
fs: update comments to point correct document
target: remove duplicate include of target/target_core_device.h from drivers/target/target_core_hba.c
...
Trivial conflict in fs/eventpoll.c (spelling vs addition)
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid: (48 commits)
HID: add support for Logitech Driving Force Pro wheel
HID: hid-ortek: remove spurious reference
HID: add support for Ortek PKB-1700
HID: roccat-koneplus: vorrect mode of sysfs attr 'sensor'
HID: hid-ntrig: init settle and mode check
HID: merge hid-egalax into hid-multitouch
HID: hid-multitouch: Send events per slot if CONTACTCOUNT is missing
HID: ntrig remove if and drop an indent
HID: ACRUX - activate the device immediately after binding
HID: ntrig: apply NO_INIT_REPORTS quirk
HID: hid-magicmouse: Correct touch orientation direction
HID: ntrig don't dereference unclaimed hidinput
HID: Do not create input devices for feature reports
HID: bt hidp: send Output reports using SET_REPORT on the Control channel
HID: hid-sony.c: Fix sending Output reports to the Sixaxis
HID: add support for Keytouch IEC 60945
HID: Add HID Report Descriptor to sysfs
HID: add IRTOUCH infrared USB to hid_have_special_driver
HID: kernel oops in out_cleanup in function hidinput_connect
HID: Add teletext/color keys - gyration remote - EU version (GYAR3101CKDE)
...
Deprecate the MN10300 arch's gdbstub in favour of KGDB, which is more capable
in some areas (such as SMP) and almost as capable in others (it's I/O is not as
decoupled and it can't start as early). gdbstub will be removed in a later
version when we're satisfied with KGDB's working.
Signed-off-by: David Howells <dhowells@redhat.com>
Allow KGDB to use the MN10300 serial ports through the polled I/O interface
provided via the TTY/serial layer and the kgdboc driver. This allows the
kernel to be started with something like:
kgdboc=ttySM0,115200
added to the command line.
Signed-off-by: David Howells <dhowells@redhat.com>
Emulate single stepping in KGDB on MN10300 by way of temporary breakpoint
insertion. These breakpoints are never actually seen by KGDB, and will overlay
KGDB's own breakpoints.
The breakpoints are removed by switch_to() and reinstalled on switching back so
that if preemption occurs, the preempting task doesn't hit them (though it will
still hit KGDB's regular breakpoints). If KGDB is reentered for any reason,
then the single step breakpoint is completely erased and must be set again by
the debugger.
We take advantage of the fact that KGDB will effectively halt all other CPUs
whilst this CPU is single-stepping to avoid SMP problems.
If the single-stepping task is preempted and killed without KGDB being
reinvoked, then the breakpoint(s) will be cleared and KGDB will be jumped back
into.
Signed-off-by: David Howells <dhowells@redhat.com>
Generalise the kernel debugger hook for notification of halt, reboot or power
off. This is used by gdbstub to tell the debugger it is exiting. This will be
useful for KGDB too.
Signed-off-by: David Howells <dhowells@redhat.com>
