From 368f2b59d024fbb58015dfd0e09c54c424cda979 Mon Sep 17 00:00:00 2001 From: Mitko Haralanov Date: Tue, 8 Mar 2016 11:14:42 -0800 Subject: [PATCH] IB/hfi1: Remove the use of add/remove RB function pointers The usage of function pointers for RB node insertion and removal in the expected receive code path was meant to be a small performance optimization. However, maintaining it, especially with the new MMU API, would become more troublesome as the API is extended. Since the performance optimization is minor, remove the function pointers and replace with direct calls. Reviewed-by: Dennis Dalessandro Reviewed-by: Dean Luick Signed-off-by: Mitko Haralanov Signed-off-by: Jubin John Signed-off-by: Doug Ledford --- drivers/staging/rdma/hfi1/hfi.h | 2 -- drivers/staging/rdma/hfi1/user_exp_rcv.c | 25 +++++++++++++----------- 2 files changed, 14 insertions(+), 13 deletions(-) diff --git a/drivers/staging/rdma/hfi1/hfi.h b/drivers/staging/rdma/hfi1/hfi.h index 78c8e24b1970..2107cdc8ce3f 100644 --- a/drivers/staging/rdma/hfi1/hfi.h +++ b/drivers/staging/rdma/hfi1/hfi.h @@ -1199,8 +1199,6 @@ struct hfi1_filedata { u32 invalid_tid_idx; /* protect invalid_tids array and invalid_tid_idx */ spinlock_t invalid_lock; - int (*mmu_rb_insert)(struct rb_root *, struct mmu_rb_node *); - void (*mmu_rb_remove)(struct rb_root *, struct mmu_rb_node *); }; extern struct list_head hfi1_dev_list; diff --git a/drivers/staging/rdma/hfi1/user_exp_rcv.c b/drivers/staging/rdma/hfi1/user_exp_rcv.c index c9e05ddd469f..b0b193f30fac 100644 --- a/drivers/staging/rdma/hfi1/user_exp_rcv.c +++ b/drivers/staging/rdma/hfi1/user_exp_rcv.c @@ -223,14 +223,6 @@ int hfi1_user_exp_rcv_init(struct file *fp) } } - if (HFI1_CAP_IS_USET(TID_UNMAP)) { - fd->mmu_rb_insert = mmu_rb_insert; - fd->mmu_rb_remove = mmu_rb_remove; - } else { - fd->mmu_rb_insert = hfi1_mmu_rb_insert; - fd->mmu_rb_remove = hfi1_mmu_rb_remove; - } - /* * PSM does not have a good way to separate, count, and * effectively enforce a limit on RcvArray entries used by @@ -861,7 +853,10 @@ static int set_rcvarray_entry(struct file *fp, unsigned long vaddr, node->freed = false; memcpy(node->pages, pages, sizeof(struct page *) * npages); - ret = fd->mmu_rb_insert(root, &node->mmu); + if (HFI1_CAP_IS_USET(TID_UNMAP)) + ret = mmu_rb_insert(root, &node->mmu); + else + ret = hfi1_mmu_rb_insert(root, &node->mmu); if (ret) { hfi1_cdbg(TID, "Failed to insert RB node %u 0x%lx, 0x%lx %d", @@ -901,7 +896,10 @@ static int unprogram_rcvarray(struct file *fp, u32 tidinfo, node = fd->entry_to_rb[rcventry]; if (!node || node->rcventry != (uctxt->expected_base + rcventry)) return -EBADF; - fd->mmu_rb_remove(&fd->tid_rb_root, &node->mmu); + if (HFI1_CAP_IS_USET(TID_UNMAP)) + mmu_rb_remove(&fd->tid_rb_root, &node->mmu); + else + hfi1_mmu_rb_remove(&fd->tid_rb_root, &node->mmu); if (grp) *grp = node->grp; @@ -962,7 +960,12 @@ static void unlock_exp_tids(struct hfi1_ctxtdata *uctxt, uctxt->expected_base]; if (!node || node->rcventry != rcventry) continue; - fd->mmu_rb_remove(root, &node->mmu); + if (HFI1_CAP_IS_USET(TID_UNMAP)) + mmu_rb_remove(&fd->tid_rb_root, + &node->mmu); + else + hfi1_mmu_rb_remove(&fd->tid_rb_root, + &node->mmu); clear_tid_node(fd, -1, node); } } -- 2.20.1