kernel.git/arch/powerpc/platforms/cell, branch linux-3.15.y

arch/powerpc: Use RCU_INIT_POINTER(x, NULL) in platforms/cell/spu_syscalls.c

2014-04-09T02:53:40Z

Here rcu_assign_pointer() is ensuring that the initialization of a structure is carried out before storing a pointer to that structure. So, rcu_assign_pointer(p, NULL) can always safely be converted to RCU_INIT_POINTER(p, NULL). Signed-off-by: Monam Agarwal Signed-off-by: Benjamin Herrenschmidt

Merge branch 'powernv-cpuidle' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc

2014-04-02T20:47:29Z

Pull powerpc non-virtualized cpuidle from Ben Herrenschmidt: "This is the branch I mentioned in my other pull request which contains our improved cpuidle support for the "powernv" platform (non-virtualized). It adds support for the "fast sleep" feature of the processor which provides higher power savings than our usual "nap" mode but at the cost of losing the timers while asleep, and thus exploits the new timer broadcast framework to work around that limitation. It's based on a tip timer tree that you seem to have already merged" * 'powernv-cpuidle' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: cpuidle/powernv: Parse device tree to setup idle states cpuidle/powernv: Add "Fast-Sleep" CPU idle state powerpc/powernv: Add OPAL call to resync timebase on wakeup powerpc/powernv: Add context management for Fast Sleep powerpc: Split timer_interrupt() into timer handling and interrupt handling routines powerpc: Implement tick broadcast IPI as a fixed IPI message powerpc: Free up the slot of PPC_MSG_CALL_FUNC_SINGLE IPI message

Merge branch 'sched/urgent' into sched/core

2014-03-11T10:34:27Z

Pick up fixes before queueing up new changes. Signed-off-by: Ingo Molnar

mm: fix GFP_THISNODE callers and clarify

2014-03-11T00:26:19Z

GFP_THISNODE is for callers that implement their own clever fallback to remote nodes. It restricts the allocation to the specified node and does not invoke reclaim, assuming that the caller will take care of it when the fallback fails, e.g. through a subsequent allocation request without GFP_THISNODE set. However, many current GFP_THISNODE users only want the node exclusive aspect of the flag, without actually implementing their own fallback or triggering reclaim if necessary. This results in things like page migration failing prematurely even when there is easily reclaimable memory available, unless kswapd happens to be running already or a concurrent allocation attempt triggers the necessary reclaim. Convert all callsites that don't implement their own fallback strategy to __GFP_THISNODE. This restricts the allocation a single node too, but at the same time allows the allocator to enter the slowpath, wake kswapd, and invoke direct reclaim if necessary, to make the allocation happen when memory is full. Signed-off-by: Johannes Weiner Acked-by: Rik van Riel Cc: Jan Stancek Cc: Mel Gorman Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

powerpc: Implement tick broadcast IPI as a fixed IPI message

2014-03-05T04:55:04Z

For scalability and performance reasons, we want the tick broadcast IPIs to be handled as efficiently as possible. Fixed IPI messages are one of the most efficient mechanisms available - they are faster than the smp_call_function mechanism because the IPI handlers are fixed and hence they don't involve costly operations such as adding IPI handlers to the target CPU's function queue, acquiring locks for synchronization etc. Luckily we have an unused IPI message slot, so use that to implement tick broadcast IPIs efficiently. Signed-off-by: Srivatsa S. Bhat [Functions renamed to tick_broadcast* and Changelog modified by Preeti U. Murthy] Signed-off-by: Preeti U. Murthy Acked-by: Geoff Levand [For the PS3 part] Signed-off-by: Benjamin Herrenschmidt

powerpc: Free up the slot of PPC_MSG_CALL_FUNC_SINGLE IPI message

2014-03-05T04:53:24Z

The IPI handlers for both PPC_MSG_CALL_FUNC and PPC_MSG_CALL_FUNC_SINGLE map to a common implementation - generic_smp_call_function_single_interrupt(). So, we can consolidate them and save one of the IPI message slots, (which are precious on powerpc, since only 4 of those slots are available). So, implement the functionality of PPC_MSG_CALL_FUNC_SINGLE using PPC_MSG_CALL_FUNC itself and release its IPI message slot, so that it can be used for something else in the future, if desired. Signed-off-by: Srivatsa S. Bhat Signed-off-by: Preeti U. Murthy Acked-by: Geoff Levand [For the PS3 part] Signed-off-by: Benjamin Herrenschmidt

powerpc/spufs: Remove MAX_USER_PRIO define

2014-02-11T08:58:33Z

Current ppc64_defconfig fails with: arch/powerpc/platforms/cell/spufs/sched.c:86:0: error: "MAX_USER_PRIO" redefined [-Werror] cc1: all warnings being treated as errors Commit 6b6350f155af ("sched: Expose some macros related to priority") introduced a generic MAX_USER_PRIO macro to sched/prio.h, which is causing the conflit. Use that one instead of our own. Reported-by: Fengguang Wu Reported-by: Stephen Rothwell Signed-off-by: Jeremy Kerr Cc: Dongsheng Yang Cc: linuxppc-dev@lists.ozlabs.org Link: http://lkml.kernel.org/r/1392098717.689604.970589769393.1.gpush@pablo Signed-off-by: Ingo Molnar

powerpc/iommu: Add it_page_shift field to determine iommu page size

2013-12-30T03:17:13Z

This patch adds a it_page_shift field to struct iommu_table and initiliases it to 4K for all platforms. Signed-off-by: Alistair Popple Signed-off-by: Benjamin Herrenschmidt

powerpc/iommu: Update constant names to reflect their hardcoded page size

2013-12-30T03:17:06Z

The powerpc iommu uses a hardcoded page size of 4K. This patch changes the name of the IOMMU_PAGE_* macros to reflect the hardcoded values. A future patch will use the existing names to support dynamic page sizes. Signed-off-by: Alistair Popple Signed-off-by: Alexey Kardashevskiy Signed-off-by: Benjamin Herrenschmidt

powerpc/mm: Use HPTE constants when updating hpte bits

2013-12-09T00:40:27Z

Even though we have same value for linux PTE bits and hash PTE pits use the hash pte bits wen updating hash pte Signed-off-by: Aneesh Kumar K.V Acked-by: Paul Mackerras Signed-off-by: Benjamin Herrenschmidt