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The previous patch made 64-bit booke KVM build again, but Altivec
support is still not complete, and we can't prevent the guest from
turning on Altivec (which can corrupt host state until state
save/restore is implemented). Disable e6500 on KVM until this is
fixed.
Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
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Interrupt numbers defined for Book3E follows IVORs definition. Align
BOOKE_INTERRUPT_ALTIVEC_UNAVAIL and BOOKE_INTERRUPT_ALTIVEC_ASSIST to this
rule which also fixes the build breakage.
IVORs 32 and 33 are shared so reflect this in the interrupts naming.
This fixes a build break for 64-bit booke KVM.
Signed-off-by: Mihai Caraman <mihai.caraman@freescale.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
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The API requires that the GET_ONE_REG and SET_ONE_REG ioctls have this
extra information encoded in the register identifiers.
Signed-off-by: David Daney <david.daney@cavium.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
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We use 0x7000000000000000ULL as 0x6000000000000000ULL is reserved for
ARM64.
Signed-off-by: David Daney <david.daney@cavium.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
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According to include/uapi/linux/kvm_para.h architectures should define
kvm_para_available, so add an implementation to asm-generic/kvm_para.h
which just returns false.
This fixes intel8x0.c build failure on mips with KVM enabled.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Gleb Natapov <gleb@redhat.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc
Pull MMC fixes from Chris Ball:
- sdhci-acpi: Fix initial runtime PM status, add more ACPI IDs
- atmel-mci, omap_hsmmc: DT handling fixes
- esdhc-imx: Fix SDIO IRQs, fix multiblock reads (both h/w errata)
* tag 'mmc-fixes-for-3.10-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc:
mmc: omap_hsmmc: Skip platform_get_resource_byname() for dt case
mmc: omap_hsmmc: convert to dma_request_slave_channel_compat
mmc: omap_hsmmc: Fix the DT pbias workaround for MMC controllers 2 to 5
mmc: sdhci-pci: add more device ids
mmc: sdhci-acpi: add more device ids
mmc: sdhci-acpi: fix initial runtime pm status
mmc: atmel-mci: convert to dma_request_slave_channel_compat()
mmc: sdhci-esdhc-imx: fix multiblock reads on i.MX53
mmc: sdhci-esdhc-imx: Fix SDIO interrupts
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git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
Pull input fixes from Dmitry Torokhov:
"Just a 2 small driver fixups here"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
Input: wacom - fix a typo for Cintiq 22HDT
Input: synaptics - fix sync lost after resume on some laptops
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Pull kvm bugfixes from Gleb Natapov:
"The bulk of the fixes is in MIPS KVM kernel<->userspace ABI. MIPS KVM
is new for 3.10 and some problems were found with current ABI. It is
better to fix them now and do not have a kernel with broken one"
* 'fixes' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
KVM: Fix race in apic->pending_events processing
KVM: fix sil/dil/bpl/spl in the mod/rm fields
KVM: Emulate multibyte NOP
ARM: KVM: be more thorough when invalidating TLBs
ARM: KVM: prevent NULL pointer dereferences with KVM VCPU ioctl
mips/kvm: Use ENOIOCTLCMD to indicate unimplemented ioctls.
mips/kvm: Fix ABI by moving manipulation of CP0 registers to KVM_{G,S}ET_ONE_REG
mips/kvm: Use ARRAY_SIZE() instead of hardcoded constants in kvm_arch_vcpu_ioctl_{s,g}et_regs
mips/kvm: Fix name of gpr field in struct kvm_regs.
mips/kvm: Fix ABI for use of 64-bit registers.
mips/kvm: Fix ABI for use of FPU.
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Pull gfs2 fixes from Steven Whitehouse:
"There are four patches this time.
The first fixes a problem where the wrong descriptor type was being
written into the log for journaled data blocks.
The second fixes a race relating to the deallocation of allocator
data.
The third provides a fallback if kmalloc is unable to satisfy a
request to allocate a directory hash table.
The fourth fixes the iopen glock caching so that inodes are deleted in
a more timely manner after rmdir/unlink"
* git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-3.0-fixes:
GFS2: Don't cache iopen glocks
GFS2: Fall back to vmalloc if kmalloc fails for dir hash tables
GFS2: Increase i_writecount during gfs2_setattr_size
GFS2: Set log descriptor type for jdata blocks
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git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse
Pull fuse fixes from Miklos Szeredi:
"One patch fixes an Oops introduced in 3.9 with the readdirplus
feature. The rest are fixes for async-dio in 3.10"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse:
fuse: fix alignment in short read optimization for async_dio
fuse: return -EIOCBQUEUED from fuse_direct_IO() for all async requests
fuse: fix readdirplus Oops in fuse_dentry_revalidate
fuse: update inode size and invalidate attributes on fallocate
fuse: truncate pagecache range on hole punch
fuse: allocate for_background dio requests based on io->async state
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Pull microblaze fixes from Michal Simek:
"One is fixing warning reported by sparse and the second warning was
reported by Geert in his build regressions/improvements status update
for -rc4."
* 'next' of git://git.monstr.eu/linux-2.6-microblaze:
microblaze: Use static inline functions in cacheflush.h
microblaze: Fix sparse warnings
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And make the lines easier to read.
Signed-off-by: Ping Cheng <pingc@wacom.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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In summary, the symptom is intermittent key events lost after resume
on some machines with synaptics touchpad (seems this is synaptics _only_),
and key events loss is due to serio port reconnect after psmouse sync lost.
Removing psmouse and inserting it back during the suspend/resume process
is able to work around the issue, so the difference between psmouse_connect()
and psmouse_reconnect() is the key to the root cause of this problem.
After comparing the two different paths, synaptics driver has its own
implementation of synaptics_reconnect(), and the missing psmouse_probe()
seems significant, the patch below added psmouse_probe() to the reconnect
process, and has been verified many times that the issue could not be reliably
reproduced.
There are two PS/2 commands in psmouse_probe():
1. PSMOUSE_CMD_GETID
2. PSMOUSE_CMD_RESET_DIS
Only the PSMOUSE_CMD_GETID seems to be significant. The
PSMOUSE_CMD_RESET_DIS is irrelevant to this issue after trying
several times. So we have only implemented this patch to issue
the PSMOUSE_CMD_GETID so far.
Tested-by: Daniel Manrique <daniel.manrique@canonical.com>
Signed-off-by: James M Leddy <james.leddy@canonical.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator
Pull regulator fixes from Mark Brown:
"A few small fixes for v3.10, documentation things in the core and a
few driver bugs."
* tag 'regulator-v3.10-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
regulator: palmas: Fix "enable_reg" to point to the correct reg for SMPS10
regulator: palmas: Fix incorrect condition
regulator: core: Correct spelling mistake in comment
regulator: dbx500: Make local symbol static
regulator: Fix kernel-doc generation warnings.
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Pull jfs bugfixes from David Kleikamp:
"A couple jfs bug fixes for 3.10-rc5"
* tag 'jfs-3.10-rc5' of git://github.com/kleikamp/linux-shaggy:
fs/jfs: Add check if journaling to disk has been disabled in lbmRead()
jfs: Several bugs in jfs_freeze() and jfs_unfreeze()
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This patch makes GFS2 immediately reclaim/delete all iopen glocks
as soon as they're dequeued. This allows deleters to get an
EXclusive lock on iopen so files are deleted properly instead of
being set as unlinked.
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
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This version has one more correction: the vmalloc calls are replaced
by __vmalloc calls to preserve the GFP_NOFS flag.
When GFS2's directory management code allocates buffers for a
directory hash table, if it can't get the memory it needs, it
currently gives a bad return code. Rather than giving an error,
this patch allows it to use virtual memory rather than kernel
memory for the hash table. This should make it possible for
directories to function properly, even when kernel memory becomes
very fragmented.
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
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This patch calls get_write_access in a few functions. This
merely increases inode->i_writecount for the duration of the function.
That will ensure that any file closes won't delete the inode's
multi-block reservation while the function is running.
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
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This patch sets the log descriptor type according to whether the
journal commit is for (journaled) data or metadata. This was
recently broken when the functions to process data and metadata
log ops were combined.
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
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The bug was introduced with async_dio feature: trying to optimize short reads,
we cut number-of-bytes-to-read to i_size boundary. Hence the following example:
truncate --size=300 /mnt/file
dd if=/mnt/file of=/dev/null iflag=direct
led to FUSE_READ request of 300 bytes size. This turned out to be problem
for userspace fuse implementations who rely on assumption that kernel fuse
does not change alignment of request from client FS.
The patch turns off the optimization if async_dio is disabled. And, if it's
enabled, the patch fixes adjustment of number-of-bytes-to-read to preserve
alignment.
Note, that we cannot throw out short read optimization entirely because
otherwise a direct read of a huge size issued on a tiny file would generate
a huge amount of fuse requests and most of them would be ACKed by userspace
with zero bytes read.
Signed-off-by: Maxim Patlasov <MPatlasov@parallels.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
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If request submission fails for an async request (i.e.,
get_user_pages() returns -ERESTARTSYS), we currently skip the
-EIOCBQUEUED return and drop into wait_for_sync_kiocb() forever.
Avoid this by always returning -EIOCBQUEUED for async requests. If
an error occurs, the error is passed into fuse_aio_complete(),
returned via aio_complete() and thus propagated to userspace via
io_getevents().
Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Maxim Patlasov <MPatlasov@parallels.com>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
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Fix bug introduced by commit 4582a4ab2a "FUSE: Adapt readdirplus to application
usage patterns".
We need to check for a positive dentry; negative dentries are not added by
readdirplus. Secondly we need to advise the use of readdirplus on the *parent*,
otherwise the whole thing is useless. Thirdly all this is only relevant if
"readdirplus_auto" mode is selected by the filesystem.
We advise the use of readdirplus only if the dentry was still valid. If we had
to redo the lookup then there was no use in doing the -plus version.
Reported-by: Bernd Schubert <bernd.schubert@itwm.fraunhofer.de>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
CC: Feng Shuo <steve.shuo.feng@gmail.com>
CC: stable@vger.kernel.org
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Using static inline functions ensure proper type checking
which also remove compilation warning for no MMU
Compilation warning:
arch/microblaze/include/asm/cacheflush.h: warning: 'addr'
may be used uninitialized in this function [-Wmaybe-uninitialized]
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k
Pull m68k fix from Geert Uytterhoeven:
"A boot lock-up on Mac, also destined for stable"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k:
m68k/mac: Fix unexpected interrupt with CONFIG_EARLY_PRINTK
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git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull s390 fixes from Martin Schwidefsky:
"Recent bug fixes, one of them touches a common code file.
It adds two #ifndef/#endif pairs to asm-generic/io.h to be able to
override xlate_dev_kmem_ptr and xlate_dev_mem_ptr."
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
s390/pgtable: Fix gmap notifier address
s390/dasd: fix handling of gone paths
s390/pgtable: Fix check for pgste/storage key handling
arch: s390: appldata: using strncpy() and strnlen() instead of sprintf()
s390/smp: lost IPIs on cpu hotplug
kernel: Fix s390 absolute memory access for /dev/mem
s390/dma: do not call debug_dma after free
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git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
Pull cgroup fixes from Tejun Heo:
- Fix for yet another xattr bug which may lead to NULL deref.
- A subtle bug in for_each_descendant_pre(). This bug requires quite
specific conditions to trigger and isn't too likely to actually
happen in the wild, but maybe that just makes it that much more
nastier.
- A warning message added for silly cgroup re-mount (not -o remount,
but unmount followed by mount) behavior.
* 'for-3.10-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
cgroup: warn about mismatching options of a new mount of an existing hierarchy
cgroup: fix a subtle bug in descendant pre-order walk
cgroup: initialize xattr before calling d_instantiate()
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git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata
Pull libata changes from Tejun Heo:
"Nothing too interesting. PCI ID additions, some sata_rcar fixes and a
fringe bug fix for DMADIR handling which shouldn't affect any device
remotely modern."
* 'for-3.10-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata:
sata_rcar: fix interrupt handling
ahci: add an observed PCI ID for Marvell 88se9172 SATA controller
sata_rcar: clear STOP bit in bmdma_start() method
libata: make ata_exec_internal_sg honor DMADIR
ata_piix: add PCI IDs for Intel BayTail
libata: update "Maintained by:" tags
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arch/microblaze/include/asm/uaccess.h:101:3:
warning: cast removes address space of expression
arch/microblaze/include/asm/uaccess.h:107:2:
warning: cast removes address space of expression
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
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apic->pending_events processing has a race that may cause INIT and
SIPI
processing to be reordered:
vpu0: vcpu1:
set INIT
test_and_clear_bit(KVM_APIC_INIT)
process INIT
set INIT
set SIPI
test_and_clear_bit(KVM_APIC_SIPI)
process SIPI
At the end INIT is left pending in pending_events. The following patch
fixes this by latching pending event before processing them.
Signed-off-by: Gleb Natapov <gleb@redhat.com>
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The x86-64 extended low-byte registers were fetched correctly from reg,
but not from mod/rm.
This fixes another bug in the boot of RHEL5.9 64-bit, but it is still
not enough.
Cc: <stable@vger.kernel.org> # 3.9
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
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This is encountered when booting RHEL5.9 64-bit. There is another bug
after this one that is not a simple emulation failure, but this one lets
the boot proceed a bit.
Cc: <stable@vger.kernel.org> # 3.9
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
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The KVM/ARM MMU code doesn't take care of invalidating TLBs before
freeing a {pte,pmd} table. This could cause problems if the page
is reallocated and then speculated into by another CPU.
Reported-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Christoffer Dall <cdall@cs.columbia.edu>
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Some ARM KVM VCPU ioctls require the vCPU to be properly initialized
with the KVM_ARM_VCPU_INIT ioctl before being used with further
requests. KVM_RUN checks whether this initialization has been
done, but other ioctls do not.
Namely KVM_GET_REG_LIST will dereference an array with index -1
without initialization and thus leads to a kernel oops.
Fix this by adding checks before executing the ioctl handlers.
[ Removed superflous comment from static function - Christoffer ]
Changes from v1:
* moved check into a static function with a meaningful name
Signed-off-by: Andre Przywara <andre.przywara@linaro.org>
Signed-off-by: Christoffer Dall <cdall@cs.columbia.edu>
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The Linux Way is to return -ENOIOCTLCMD to the vfs when an
unimplemented ioctl is requested. Do this in kvm_mips instead of a
random mixture of -ENOTSUPP and -EINVAL.
Signed-off-by: David Daney <david.daney@cavium.com>
Acked-by: Sanjay Lal <sanjayl@kymasys.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Because not all 256 CP0 registers are ever implemented, we need a
different method of manipulating them. Use the
KVM_SET_ONE_REG/KVM_GET_ONE_REG mechanism.
Now unused code and definitions are removed.
Signed-off-by: David Daney <david.daney@cavium.com>
Acked-by: Sanjay Lal <sanjayl@kymasys.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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kvm_arch_vcpu_ioctl_{s,g}et_regs
Also we cannot set special zero register, so force it to zero.
Signed-off-by: David Daney <david.daney@cavium.com>
Acked-by: Sanjay Lal <sanjayl@kymasys.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Signed-off-by: David Daney <david.daney@cavium.com>
Acked-by: Sanjay Lal <sanjayl@kymasys.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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All registers are 64-bits wide, 32-bit guests use the least
significant portion of the register storage fields.
Signed-off-by: David Daney <david.daney@cavium.com>
Acked-by: Sanjay Lal <sanjayl@kymasys.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Define a non-empty struct kvm_fpu.
Signed-off-by: David Daney <david.daney@cavium.com>
Acked-by: Sanjay Lal <sanjayl@kymasys.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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The driver's interrupt handling code is too picky in deciding whether it should
handle an interrupt or not which causes completely unneeded spurious interrupts.
Thus make sata_rcar_{ata|serr}_interrupt() *void*; add ATA status register read
to sata_rcar_ata_interrupt() to clear an unexpected ATA interrupt -- it doesn't
get cleared by writing to the SATAINTSTAT register in the interrupt mode we use.
Also, in sata_rcar_ata_interrupt() we should check SATAINTSTAT register only for
enabled interrupts and we should clear only those interrupts that we have read
as active first time around, because else we have a race and risk clearing an
interrupt that can occur between read and write of the SATAINTSTAT register
and never registering it...
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: stable@vger.kernel.org
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git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux
Pull parisc fixes from Helge Deller:
"This patcheset includes fixes for:
- the PCI/LBA which brings back the stifb graphics framebuffer
console
- possible memory overflows in parisc kernel init code
- parport support on older GSC machines
- avoids that users by mistake enable PARPORT_PC_SUPERIO on parisc
- MAINTAINERS file list updates for parisc."
* 'for-3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
parisc: parport0: fix this legacy no-device port driver!
parport_pc: disable PARPORT_PC_SUPERIO on parisc architecture
parisc/PCI: lba: fix: convert to pci_create_root_bus() for correct root bus resources (v2)
parisc/PCI: Set type for LBA bus_num resource
MAINTAINERS: update parisc architecture file list
parisc: kernel: using strlcpy() instead of strcpy()
parisc: rename "CONFIG_PA7100" to "CONFIG_PA7000"
parisc: fix kernel BUG at arch/parisc/include/asm/mmzone.h:50
parisc: memory overflow, 'name' length is too short for using
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Fix the above kernel error from parport_announce_port() on 32bit GSC
machines (e.g. B160L). The parport driver requires now a pointer to the
device struct.
Signed-off-by: Helge Deller <deller@gmx.de>
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If enabled, CONFIG_PARPORT_PC_SUPERIO scans on PC-like hardware for
various super-io chips by accessing i/o ports in a range which will
crash any parisc hardware at once.
In addition, parisc has it's own incompatible superio chip
(CONFIG_SUPERIO), so if we disable PARPORT_PC_SUPERIO completely for
parisc we can avoid that people by accident enable the parport_pc
superio option too.
Signed-off-by: Helge Deller <deller@gmx.de>
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resources (v2)
commit dc7dce280a
Author: Bjorn Helgaas <bhelgaas@google.com>
Date: Fri Oct 28 16:27:27 2011 -0600
parisc/PCI: lba: convert to pci_create_root_bus() for correct root bus
resources
Supply root bus resources to pci_create_root_bus() so they're correct
immediately. This fixes the problem of "early" and "header" quirks seeing
incorrect root bus resources.
added tests for elmmio_space.start while it should use
elmmio_space.flags. This for example led to incorrect resource
assignments and a non-working stifb framebuffer on most parisc machines.
LBA 10:1: PCI host bridge to bus 0000:01
pci_bus 0000:01: root bus resource [io 0x12000-0x13fff] (bus address [0x2000-0x3fff])
pci_bus 0000:01: root bus resource [mem 0xfffffffffa000000-0xfffffffffbffffff] (bus address [0xfa000000-0xfbffffff])
pci_bus 0000:01: root bus resource [mem 0xfffffffff4800000-0xfffffffff4ffffff] (bus address [0xf4800000-0xf4ffffff])
pci_bus 0000:01: root bus resource [??? 0x00000001 flags 0x0]
Signed-off-by: Helge Deller <deller@gmx.de>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
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The non-PAT resource probing code failed to set the type of the LBA bus_num
resource (30aa80da43 "parisc/PCI: register busn_res for root buses" did
the corresponding thing for the PAT case).
This causes incorrect resource assignments and a non-working stifb
framebuffer on most parisc machines.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Helge Deller <deller@gmx.de>
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Signed-off-by: Helge Deller <deller@gmx.de>
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'boot_args' is an input args, and 'boot_command_line' has a fix length.
So use strlcpy() instead of strcpy() to avoid memory overflow.
Signed-off-by: Chen Gang <gang.chen@asianux.com>
Acked-by: Kyle McMartin <kyle@mcmartin.ca>
Signed-off-by: Helge Deller <deller@gmx.de>
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There's a Makefile line setting cflags for CONFIG_PA7100. But that
Kconfig macro doesn't exist. There is a Kconfig symbol PA7000, which
covers both PA7000 and PA7100 processors. So let's use the corresponding
Kconfig macro.
Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Helge Deller <deller@gmx.de>
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With CONFIG_DISCONTIGMEM=y and multiple physical memory areas,
cat /proc/kpageflags triggers this kernel bug:
kernel BUG at arch/parisc/include/asm/mmzone.h:50!
CPU: 2 PID: 7848 Comm: cat Tainted: G D W 3.10.0-rc3-64bit #44
IAOQ[0]: kpageflags_read0x128/0x238
IAOQ[1]: kpageflags_read0x12c/0x238
RP(r2): proc_reg_read0xbc/0x130
Backtrace:
[<00000000402ca2d4>] proc_reg_read0xbc/0x130
[<0000000040235bcc>] vfs_read0xc4/0x1d0
[<0000000040235f0c>] SyS_read0x94/0xf0
[<0000000040105fc0>] syscall_exit0x0/0x14
kpageflags_read() walks through the whole memory, even if some memory
areas are physically not available. So, we should better not BUG on an
unavailable pfn in pfn_to_nid() but just return the expected value -1 or
0.
Signed-off-by: Helge Deller <deller@gmx.de>
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