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authorLinus Torvalds <torvalds@linux-foundation.org>2019-03-10 02:53:03 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2019-03-10 02:53:03 +0300
commita50243b1ddcdd766d0d17fbfeeb1a22e62fdc461 (patch)
tree3dbf847105558eaac3658a46c4934df503c866a2 /lib
parent2901752c14b8e1b7dd898d2e5245c93e531aa624 (diff)
parentfca22e7e595f1799cfbfdfa13e16d48ece0d136c (diff)
downloadlinux-a50243b1ddcdd766d0d17fbfeeb1a22e62fdc461.tar.xz
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma
Pull rdma updates from Jason Gunthorpe: "This has been a slightly more active cycle than normal with ongoing core changes and quite a lot of collected driver updates. - Various driver fixes for bnxt_re, cxgb4, hns, mlx5, pvrdma, rxe - A new data transfer mode for HFI1 giving higher performance - Significant functional and bug fix update to the mlx5 On-Demand-Paging MR feature - A chip hang reset recovery system for hns - Change mm->pinned_vm to an atomic64 - Update bnxt_re to support a new 57500 chip - A sane netlink 'rdma link add' method for creating rxe devices and fixing the various unregistration race conditions in rxe's unregister flow - Allow lookup up objects by an ID over netlink - Various reworking of the core to driver interface: - drivers should not assume umem SGLs are in PAGE_SIZE chunks - ucontext is accessed via udata not other means - start to make the core code responsible for object memory allocation - drivers should convert struct device to struct ib_device via a helper - drivers have more tools to avoid use after unregister problems" * tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma: (280 commits) net/mlx5: ODP support for XRC transport is not enabled by default in FW IB/hfi1: Close race condition on user context disable and close RDMA/umem: Revert broken 'off by one' fix RDMA/umem: minor bug fix in error handling path RDMA/hns: Use GFP_ATOMIC in hns_roce_v2_modify_qp cxgb4: kfree mhp after the debug print IB/rdmavt: Fix concurrency panics in QP post_send and modify to error IB/rdmavt: Fix loopback send with invalidate ordering IB/iser: Fix dma_nents type definition IB/mlx5: Set correct write permissions for implicit ODP MR bnxt_re: Clean cq for kernel consumers only RDMA/uverbs: Don't do double free of allocated PD RDMA: Handle ucontext allocations by IB/core RDMA/core: Fix a WARN() message bnxt_re: fix the regression due to changes in alloc_pbl IB/mlx4: Increase the timeout for CM cache IB/core: Abort page fault handler silently during owning process exit IB/mlx5: Validate correct PD before prefetch MR IB/mlx5: Protect against prefetch of invalid MR RDMA/uverbs: Store PR pointer before it is overwritten ...
Diffstat (limited to 'lib')
-rw-r--r--lib/irq_poll.c2
-rw-r--r--lib/scatterlist.c26
2 files changed, 27 insertions, 1 deletions
diff --git a/lib/irq_poll.c b/lib/irq_poll.c
index 86a709954f5a..2f17b488d58e 100644
--- a/lib/irq_poll.c
+++ b/lib/irq_poll.c
@@ -35,7 +35,7 @@ void irq_poll_sched(struct irq_poll *iop)
local_irq_save(flags);
list_add_tail(&iop->list, this_cpu_ptr(&blk_cpu_iopoll));
- __raise_softirq_irqoff(IRQ_POLL_SOFTIRQ);
+ raise_softirq_irqoff(IRQ_POLL_SOFTIRQ);
local_irq_restore(flags);
}
EXPORT_SYMBOL(irq_poll_sched);
diff --git a/lib/scatterlist.c b/lib/scatterlist.c
index 9ba349e775ef..739dc9fe2c55 100644
--- a/lib/scatterlist.c
+++ b/lib/scatterlist.c
@@ -625,6 +625,32 @@ bool __sg_page_iter_next(struct sg_page_iter *piter)
}
EXPORT_SYMBOL(__sg_page_iter_next);
+static int sg_dma_page_count(struct scatterlist *sg)
+{
+ return PAGE_ALIGN(sg->offset + sg_dma_len(sg)) >> PAGE_SHIFT;
+}
+
+bool __sg_page_iter_dma_next(struct sg_dma_page_iter *dma_iter)
+{
+ struct sg_page_iter *piter = &dma_iter->base;
+
+ if (!piter->__nents || !piter->sg)
+ return false;
+
+ piter->sg_pgoffset += piter->__pg_advance;
+ piter->__pg_advance = 1;
+
+ while (piter->sg_pgoffset >= sg_dma_page_count(piter->sg)) {
+ piter->sg_pgoffset -= sg_dma_page_count(piter->sg);
+ piter->sg = sg_next(piter->sg);
+ if (!--piter->__nents || !piter->sg)
+ return false;
+ }
+
+ return true;
+}
+EXPORT_SYMBOL(__sg_page_iter_dma_next);
+
/**
* sg_miter_start - start mapping iteration over a sg list
* @miter: sg mapping iter to be started