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2012-12-12MN10300: Handle cacheable PCI regions in pci_iomap()David Howells
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 Salter
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 Salter
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 Salter
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 Salter
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 Salter
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 Howells
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>
2012-11-29get rid of ptrace_signal_deliver() argumentsAl Viro
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 Viro
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 Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-29flagday: kill pt_regs argument of do_fork()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-28death to idle_regs()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-28flagday: don't pass regs to copy_thread()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-28bfin: switch to generic vfork, get rid of pointless wrappersAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-28xtensa: switch to generic clone()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-28openrisc: switch to use of generic fork and cloneAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-28unicore32: switch to generic clone(2)Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-28score: switch to generic fork/vfork/cloneAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-28c6x: sanitize copy_thread(), get rid of clone(2) wrapper, switch to generic ↵Al Viro
clone() Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-28take sys_fork/sys_vfork/sys_clone prototypes to linux/syscalls.hAl Viro
now it can be done... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-28mn10300: switch to generic fork/vfork/cloneAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-28h8300: switch to generic fork/vfork/cloneAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-28tile: switch to generic clone()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-28m68k: sanitize copy_thread(), fork/vfork/clone wrappers, switch to generic ↵Al Viro
fork/vfork Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-28alpha: switch to generic fork/vfork/cloneAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-28s390: switch to generic fork/vfork/cloneAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-28microblaze: switch to generic fork/vfork/cloneAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Michal Simek <michal.simek@xilinx.com>
2012-11-28hexagon: switch to generic clone()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-28sh: switch to generic fork/vfork/cloneAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-28parisc: switch to generic fork/vfork/cloneAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-28m32r: switch to generic fork/vfork/cloneAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-28cris: switch to generic fork/vfork/cloneAl Viro
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>
2012-11-28avr32: sanitize copy_thread(), switch to generic fork/vfork/clone, kill wrappersAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-28arm64: sanitize copy_thread(), switch to generic fork/vfork/cloneAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-28frv: switch to generic fork/vfork/cloneAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-28powerpc: switch to generic fork/clone/vforkAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-28arm: switch to generic fork/vfork/cloneAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-28x86, um: switch to generic fork/vfork/cloneAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-28get rid of pt_regs argument of ->load_binary()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-28get rid of pt_regs argument of search_binary_handler()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-28kill stray kernel_thread() garbageAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-28consolidate sys_execve() prototypeAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-28Merge branches 'no-rebases', 'arch-avr32', 'arch-blackfin', 'arch-cris', ↵Al Viro
'arch-h8300', 'arch-m32r', 'arch-mn10300', 'arch-score', 'arch-sh' and 'arch-powerpc' into for-next
2012-11-28generic sys_fork / sys_vfork / sys_cloneAl Viro
... and get rid of idiotic struct pt_regs * in asm-generic/syscalls.h prototypes of the same, while we are at it. Eventually we want those in linux/syscalls.h, of course, but that'll have to wait a bit. Note that there are *three* variants of sys_clone() order of arguments. Braindamage galore... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-28alpha: reorganize copy_process(), prepare to saner fork_idle()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-28alpha: don't pass useless arguments to do_{,rt_},sigreturn()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-28alpha: simplify fork and friendsAl Viro
* no need to restore everything from switch_stack when we only need $26 * no need to pass current_pt_regs() manually, we can just as easily calculate it in alpha_clone/alpha_vfork ($8 + constant) * interpretation of zero usp as "use the parent's" is simpler in copy_thread(); let fork and vfork just pass 0. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-28um: don't bother looking at regs in copy_thread() - current_pt_regs() is ↵Al Viro
what we'll get Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-28um: don't bother with passing sp to do_fork() for fork(2)/vfork(2)Al Viro
copy_thread() on um will do the right thing when getting 0 for sp... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-11-28microblaze: rt_sigreturn is too trigger-happy about sigaltstack errorsAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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