This fixes a major bug which was happening when a SPU thread advances
its execution right after being restored to a SPU. A potentially
outdated NPC value was being (re)written to the SPU.
So, spu_run_init, in this case, was either not doing anything relevant,
or breaking the execution of the SPU thread.
This fixes a common problem of losing a mailbox write when it was done
to a saved context.
Signed-off-by: Andre Detsch <adetsch@br.ibm.com>
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
When a process writes into the inbound spu mailbox (wbox) while the
context is saved, we accidentally break the contents of the mb_stat_R
register by clearing other entries of the mailbox status register. This
can cause the user side to hang.
This change fixes the problem by only altering the appropriate bits
of the mailbox status register during a backing-store write.
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This fixes a regression introduced with 2.6.23-rc4 after on some
confusion about the device tree interfaces.
IBM QS21 device trees provide "physical-id", so we changed the code to
run on that and remain compatible with all IBM machines.
However, the Toshiba Celleb device tree provides the "unit-id" property,
which was in the Linux code, but never used in this way on IBM hardware.
Legacy device tree used the reg property for the physical id of an spe.
This patch fixes find_spu_unit_number to look for the spu id in that order.
The length is checked to avoid misinterpretation in case the attributes
unit-id or reg do not contain the id.
Signed-off-by: Christian Krafft <krafft@de.ibm.com>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
Cc: Jeremy Kerr <jk@ozlabs.org>
When we flush register state for FP, Altivec, or SPE in flush_*_to_thread
we need to respect the task_struct that the caller has passed to us.
Most cases we are called with current, however sometimes (ptrace) we may
be passed a different task_struct.
This showed up when using gdbserver debugging a simple program that used
floating point. When gdb tried to show the FP regs they all showed up as
0, because the child's FP registers were never properly flushed to memory.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6:
[SPARC32]: Make flush_tlb_kernel_range() an inline function.
[SERIAL]: Fix 32-bit warnings in sunzilog.c and sunsu.c
[SPARC32]: Kill unused vars and macros from prom/console.c
[SPARC32]: Add __cmpdi2() libcall implementation ala. MIPS.
[VIDEO]: Do not prom_halt() in cg3 and bw2 device probe.
[SUNVDC]: Use slice 0xff on VD_DISK_TYPE_DISK.
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc:
[POWERPC] Fix SLB initialization at boot time
[POWERPC] Fix undefined reference to device_power_up/resume
[POWERPC] cell: Update cell_defconfig for 2.6.23
[POWERPC] axonram: Do not delete gendisks queue in error path
[POWERPC] axonram: Module modification for latest firmware API changes
[POWERPC] cell: Support pinhole-reset on IBM cell blades
[POWERPC] spu_manage: Use newer physical-id attribute
[POWERPC] pasemi: Another IOMMU bugfix for 64K PAGE_SIZE
* 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/kyle/parisc-2.6:
[PARISC] Add NOTES section
[PARISC] Use compat_sys_getdents
[PARISC] Do not allow STI_CONSOLE to be modular
[PARISC] Clean up sti_flush
[PARISC] Add dummy isa_(bus|virt)_to_(virt|bus) inlines
[PARISC] Add empty <asm-parisc/vga.h>
Bisected bizarre kernel-space nullptr dereference in udev to commit
18991197b4, adding the NOTES section fixes
it.
Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>
shutdown_bridge_irq disconnects the irq so we need to connect the irq or
requesting the same irq a send time will fail. This used to make
things like ifconfig eth0 down; ifconfig eth0 up fail on IP27.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Certain 32-bit kernel configurations seem to be able to cause references,
this was observed with gcc 4.1.2.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Since 96bde06a2d several callers of
pcibios_resource_to_bus are no longer marked __devinit resulting in a
pile of modpost warnings if PCI && !HOTPLUG:
MODPOST vmlinux.o
WARNING: vmlinux.o(.text+0x15dde8): Section mismatch: reference to .init.text:pcibios_resource_to_bus (between 'pci_map_rom' and 'pci_map_rom_copy')
WARNING: vmlinux.o(.text+0x15e140): Section mismatch: reference to .init.text:pcibios_resource_to_bus (between 'pci_update_resource' and 'pci_claim_resource')
WARNING: vmlinux.o(.text+0x15f0cc): Section mismatch: reference to .init.text:pcibios_resource_to_bus (between 'pci_setup_cardbus' and 'pci_bus_assign_resources')
WARNING: vmlinux.o(.text+0x15f0f0): Section mismatch: reference to .init.text:pcibios_resource_to_bus (between 'pci_setup_cardbus' and 'pci_bus_assign_resources')
WARNING: vmlinux.o(.text+0x15f114): Section mismatch: reference to .init.text:pcibios_resource_to_bus (between 'pci_setup_cardbus' and 'pci_bus_assign_resources')
WARNING: vmlinux.o(.text+0x15f138): Section mismatch: reference to .init.text:pcibios_resource_to_bus (between 'pci_setup_cardbus' and 'pci_bus_assign_resources')
WARNING: vmlinux.o(.text+0x15f438): Section mismatch: reference to .init.text:pcibios_resource_to_bus (between 'pci_bus_assign_resources' and 'pbus_size_mem')
WARNING: vmlinux.o(.text+0x15f4f4): Section mismatch: reference to .init.text:pcibios_resource_to_bus (between 'pci_bus_assign_resources' and 'pbus_size_mem')
Removing __devinit from pcibios_resource_to_bus make the same necessary
for pcibios_fixup_device_resources as well.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Since 96bde06a2d pcibios_fixup_bus's caller
pci_scan_child_bus is no longer marked __devinit resulting in this modpost
warning if PCI && !HOTPLUG:
MODPOST vmlinux.o
WARNING: vmlinux.o(.text+0x158b9c): Section mismatch: reference to .init.text:pcibios_fixup_bus (between 'pci_scan_child_bus' and 'pci_scan_bus_parented')
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
The appended patch adds code to update siginfo_t's si_code field. It
fixes e.g. a floating point overflow regression in the SBCL testsuite.
Signed-off-By: Thiemo Seufer <ths@linux-mips.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Also removes the while(1); loop by propagating the ATTRIB_NORET of die()
to nmi_exception_handler.
Signed-off-by: Thiemo Seufer <ths@networkno.de>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
The rtc-rs5c348 SPI driver name doesn't match its module name, which
prevents it from properly hotplugging. There is only one in-tree user
of its driver, which is fixed by this patch too.
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Acked-by: David Brownell <david-b@pacbell.net>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
CC arch/mips/basler/excite/excite_prom.o
arch/mips/basler/excite/excite_prom.c:136:3: #error 64 bit support not implemented
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
MIPS doesn't do CPU hotplugging yet but since many of the functions don't
even have an __init let's fix this right.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
