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2012-12-12MN10300: Handle cacheable PCI regions in pci_iomap()David Howells2-1/+36
Handle cacheable PCI regions in pci_iomap(). If IORESOURCE_CACHEABLE is set then we AND away the 0x20000000 "flag". Signed-off-by: David Howells <dhowells@redhat.com>
2012-12-12MN10300: fix debug polling in ttySM driverMark Salter1-12/+23
The debug polling interface for the SoC serial ports did not work in the case where the serial ports were not also used as a console. In that case, the uart driver startup function will not be called so tx and rx would not be enabled in the hardware control register. Also, vdma interrupts would not be enabled which the poll_get_char function relied on. This patch makes sure that the rx and tx enables are set as a consequence of the uart set_termios call which is the only initialization done for the debug polling interface. Also, the poll_get_char now handles the case where vdma interrupts are not enabled. Signed-off-by: Mark Salter <msalter@redhat.com> Signed-off-by: David Howells <dhowells@redhat.com>
2012-12-12MN10300: ttySM: clean up unnecessary castingMark Salter2-6/+6
The ttySM uart data register pointers are declared as void* pointers. Change them to u8* pointers so we don't need to use casts in the code. Signed-off-by: Mark Salter <msalter@redhat.com> Signed-off-by: David Howells <dhowells@redhat.com>
2012-12-12MN10300: fix SMP synchronization between txdma and serial driverMark Salter4-48/+90
The SoC serial port driver uses a high priority interrupt to handle tx of characters in the tx ring buffer. The driver needs to disable/enable this IRQ from outside of irq context. The original code to do this is not foolproof on SMP machines because the IRQ running on one core could still access the serial port for a short time after the driver running on another core disables the interrupt. This patch adds a flag to tell the IRQ handler that the driver wants to disable the interrupt. After seeing the flag, the IRQ handler will immediately disable the interrupt and exit. After setting the flag, the driver will wait for interrupt to be disabled by the IRQ handler. Signed-off-by: Mark Salter <msalter@redhat.com> Signed-off-by: David Howells <dhowells@redhat.com>
2012-12-12MN10300: fix serial port vdma irq setup for SMPMark Salter1-4/+30
The builtin SoC serial ports have no FIFOs and use a virtual DMA mechanism based on high priority IRQs to avoid overruns. These high priority interrupts are pinned to cpu#0 on SMP systems. This patch fixes a problem with SMP where the set_intr_level() interface is used to set the priority for these IRQs. The set_intr_level() function sets priority on the local cpu but on SMP systems, this code may be run on some other cpu than the one handling the interrupts. Instead of setting interrupt level explicitly, this patch uses a special irq_chip for these interrupts so that the mask/unmask methods can set the interrupt level implicitly. Signed-off-by: Mark Salter <msalter@redhat.com> Signed-off-by: David Howells <dhowells@redhat.com>
2012-12-12MN10300: cleanup IRQ affinity settingMark Salter3-52/+17
The irq_set_affinity handler for the mn10300 cpu pic had some hard-coded IRQs which were not to be migrated from one cpu to another. This patch cleans those up by using a combination of IRQF_NOBALANCING and specialized irq chips with no irq_set_affinity handler. This maintains the previous behavior by using generic IRQ interfaces rather than hard coding IRQ numbers in the default irq_set_affinity handler. Signed-off-by: Mark Salter <msalter@redhat.com> Signed-off-by: David Howells <dhowells@redhat.com>
2012-12-12MN10300: ttySM: Use memory barriers correctly in circular buffer logicDavid Howells1-6/+8
Use memory barriers correctly in the circular buffer logic used in the driver, as documented in Documentation/circular-buffers.txt. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Mark Salter <msalter@redhat.com>
2012-11-29do_coredump(): get rid of pt_regs argumentAl Viro3-5/+5
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-29print_fatal_signal(): get rid of pt_regs argumentAl Viro1-2/+3
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-29ptrace_signal(): get rid of unused argumentsAl Viro1-4/+2
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-29get rid of ptrace_signal_deliver() argumentsAl Viro4-5/+5
the first one is equal to signal_pt_regs(), the second is never used (and always NULL, while we are at it). Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-29new helper: signal_pt_regs()Al Viro3-0/+11
Always equal to task_pt_regs(current); defined only when we are in signal delivery. It may be different from current_pt_regs() - e.g. architectures like m68k may have pt_regs location on exception different from that on a syscall and signals (just as ptrace handling) may happen on exceptions as well as on syscalls. When they are equal, it's often better to have signal_pt_regs defined (in asm/ptrace.h) as current_pt_regs - that tends to be optimized better than default would be. However, optimisation is the only reason why we might want an arch-specific definition; if current_pt_regs() and task_pt_regs(current) have different values, the latter one is right. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-29unify default ptrace_signal_deliverAl Viro18-42/+6
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-29flagday: kill pt_regs argument of do_fork()Al Viro9-26/+19
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-29death to idle_regs()Al Viro4-22/+0
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-29don't pass regs to copy_process()Al Viro1-4/+2
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-29flagday: don't pass regs to copy_thread()Al Viro34-60/+45
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-29bfin: switch to generic vfork, get rid of pointless wrappersAl Viro5-54/+7
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-29xtensa: switch to generic clone()Al Viro5-11/+3
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-29openrisc: switch to use of generic fork and cloneAl Viro6-66/+19
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-29unicore32: switch to generic clone(2)Al Viro4-25/+7
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-29score: switch to generic fork/vfork/cloneAl Viro6-58/+8
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-29c6x: sanitize copy_thread(), get rid of clone(2) wrapper, switch to generic ↵Al Viro4-36/+6
clone() Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-29take sys_fork/sys_vfork/sys_clone prototypes to linux/syscalls.hAl Viro12-63/+11
now it can be done... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-29mn10300: switch to generic fork/vfork/cloneAl Viro2-28/+8
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-29h8300: switch to generic fork/vfork/cloneAl Viro3-44/+6
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-29tile: switch to generic clone()Al Viro2-8/+1
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-29m68k: sanitize copy_thread(), fork/vfork/clone wrappers, switch to generic ↵Al Viro4-71/+46
fork/vfork Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-29alpha: switch to generic fork/vfork/cloneAl Viro4-59/+17
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-29s390: switch to generic fork/vfork/cloneAl Viro3-42/+14
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-29microblaze: switch to generic fork/vfork/cloneAl Viro7-56/+12
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Michal Simek <michal.simek@xilinx.com>
2012-11-29hexagon: switch to generic clone()Al Viro4-52/+6
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-29sh: switch to generic fork/vfork/cloneAl Viro5-110/+11
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-29parisc: switch to generic fork/vfork/cloneAl Viro4-69/+22
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-29m32r: switch to generic fork/vfork/cloneAl Viro2-42/+7
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-29cris: switch to generic fork/vfork/cloneAl Viro4-60/+13
same braindamage as on s390 - the first two arguments of clone(2) in the wrong order. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-29avr32: sanitize copy_thread(), switch to generic fork/vfork/clone, kill wrappersAl Viro4-47/+11
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-29arm64: sanitize copy_thread(), switch to generic fork/vfork/cloneAl Viro7-28/+12
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-29frv: switch to generic fork/vfork/cloneAl Viro2-40/+8
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-29powerpc: switch to generic fork/clone/vforkAl Viro4-32/+4
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-29arm: switch to generic fork/vfork/cloneAl Viro6-55/+13
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-29x86, um: switch to generic fork/vfork/cloneAl Viro16-117/+52
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-29get rid of pt_regs argument of ->load_binary()Al Viro12-20/+25
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-29get rid of pt_regs argument of search_binary_handler()Al Viro6-9/+8
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-29get rid of pt_regs argument of do_execve_common()Al Viro1-4/+4
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-29get rid of pt_regs argument of do_execve()Al Viro3-13/+8
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-29make compat_do_execve() static, lose pt_regs argumentAl Viro2-8/+4
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-29kill stray kernel_thread() garbageAl Viro4-6/+0
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-29audit: no nested contexts anymore...Al Viro1-81/+21
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-29consolidate sys_execve() prototypeAl Viro6-18/+3
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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