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* MN10300: ttySM: clean up unnecessary castingMark Salter2012-12-12
| | | | | | | | 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>
* MN10300: fix SMP synchronization between txdma and serial driverMark Salter2012-12-12
| | | | | | | | | | | | | | | 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>
* MN10300: fix serial port vdma irq setup for SMPMark Salter2012-12-12
| | | | | | | | | | | | | | | 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>
* MN10300: cleanup IRQ affinity settingMark Salter2012-12-12
| | | | | | | | | | | | 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>
* MN10300: ttySM: Use memory barriers correctly in circular buffer logicDavid Howells2012-12-12
| | | | | | | | 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>
* do_coredump(): get rid of pt_regs argumentAl Viro2012-11-29
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* print_fatal_signal(): get rid of pt_regs argumentAl Viro2012-11-29
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* ptrace_signal(): get rid of unused argumentsAl Viro2012-11-29
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* get rid of ptrace_signal_deliver() argumentsAl Viro2012-11-29
| | | | | | | 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>
* new helper: signal_pt_regs()Al Viro2012-11-29
| | | | | | | | | | | | | | | | | 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>
* unify default ptrace_signal_deliverAl Viro2012-11-29
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* flagday: kill pt_regs argument of do_fork()Al Viro2012-11-29
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* death to idle_regs()Al Viro2012-11-28
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* don't pass regs to copy_process()Al Viro2012-11-28
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* flagday: don't pass regs to copy_thread()Al Viro2012-11-28
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* bfin: switch to generic vfork, get rid of pointless wrappersAl Viro2012-11-28
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* xtensa: switch to generic clone()Al Viro2012-11-28
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* openrisc: switch to use of generic fork and cloneAl Viro2012-11-28
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* unicore32: switch to generic clone(2)Al Viro2012-11-28
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* score: switch to generic fork/vfork/cloneAl Viro2012-11-28
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* c6x: sanitize copy_thread(), get rid of clone(2) wrapper, switch to generic ↵Al Viro2012-11-28
| | | | | | clone() Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* take sys_fork/sys_vfork/sys_clone prototypes to linux/syscalls.hAl Viro2012-11-28
| | | | | | now it can be done... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* mn10300: switch to generic fork/vfork/cloneAl Viro2012-11-28
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* h8300: switch to generic fork/vfork/cloneAl Viro2012-11-28
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* tile: switch to generic clone()Al Viro2012-11-28
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* m68k: sanitize copy_thread(), fork/vfork/clone wrappers, switch to generic ↵Al Viro2012-11-28
| | | | | | fork/vfork Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* alpha: switch to generic fork/vfork/cloneAl Viro2012-11-28
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* s390: switch to generic fork/vfork/cloneAl Viro2012-11-28
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* microblaze: switch to generic fork/vfork/cloneAl Viro2012-11-28
| | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Michal Simek <michal.simek@xilinx.com>
* hexagon: switch to generic clone()Al Viro2012-11-28
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* sh: switch to generic fork/vfork/cloneAl Viro2012-11-28
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* parisc: switch to generic fork/vfork/cloneAl Viro2012-11-28
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* m32r: switch to generic fork/vfork/cloneAl Viro2012-11-28
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* cris: switch to generic fork/vfork/cloneAl Viro2012-11-28
| | | | | | | 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>
* avr32: sanitize copy_thread(), switch to generic fork/vfork/clone, kill wrappersAl Viro2012-11-28
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* arm64: sanitize copy_thread(), switch to generic fork/vfork/cloneAl Viro2012-11-28
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* frv: switch to generic fork/vfork/cloneAl Viro2012-11-28
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* powerpc: switch to generic fork/clone/vforkAl Viro2012-11-28
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* arm: switch to generic fork/vfork/cloneAl Viro2012-11-28
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* x86, um: switch to generic fork/vfork/cloneAl Viro2012-11-28
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* get rid of pt_regs argument of ->load_binary()Al Viro2012-11-28
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* get rid of pt_regs argument of search_binary_handler()Al Viro2012-11-28
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* get rid of pt_regs argument of do_execve_common()Al Viro2012-11-28
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* get rid of pt_regs argument of do_execve()Al Viro2012-11-28
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* make compat_do_execve() static, lose pt_regs argumentAl Viro2012-11-28
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* kill stray kernel_thread() garbageAl Viro2012-11-28
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* audit: no nested contexts anymore...Al Viro2012-11-28
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* consolidate sys_execve() prototypeAl Viro2012-11-28
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
*-----------------. Merge branches 'no-rebases', 'arch-avr32', 'arch-blackfin', 'arch-cris', ↵Al Viro2012-11-28
|\ \ \ \ \ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 'arch-h8300', 'arch-m32r', 'arch-mn10300', 'arch-score', 'arch-sh' and 'arch-powerpc' into for-next
| | | | | | | | | | * powerpc: make fork_idle() take the common "kernel thread" path in copy_thread()Al Viro2012-10-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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