From 57631811728d12ad9b0e96ed3eccb486124a5605 Mon Sep 17 00:00:00 2001 From: Motohiro KOSAKI Date: Thu, 19 May 2011 01:04:42 +0000 Subject: [PATCH] IB/ipath: Convert old cpumask api into new one Adapt to new api. We plan to remove old one later. Almost all changes are trivial, but there is one real fix: the following code is unsafe: int ncpus = num_online_cpus() for (i = 0; i < ncpus; i++) { .. } because 1) we don't guarantee last bit of online cpus is equal to num_online_cpus(). some arch assign sparse cpu number. 2) cpu hotplugging may change cpu_online_mask at same time. we need to pin it by get_online_cpus(). Signed-off-by: KOSAKI Motohiro Acked-by: Mike Marciniszyn Signed-off-by: Roland Dreier --- drivers/infiniband/hw/ipath/ipath_file_ops.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/drivers/infiniband/hw/ipath/ipath_file_ops.c b/drivers/infiniband/hw/ipath/ipath_file_ops.c index ee79a2d97b14..8697eca14356 100644 --- a/drivers/infiniband/hw/ipath/ipath_file_ops.c +++ b/drivers/infiniband/hw/ipath/ipath_file_ops.c @@ -40,6 +40,7 @@ #include #include #include +#include #include #include "ipath_kernel.h" @@ -1684,17 +1685,19 @@ static int find_best_unit(struct file *fp, * information. There may be some issues with dual core numbering * as well. This needs more work prior to release. */ - if (!cpumask_empty(¤t->cpus_allowed) && - !cpumask_full(¤t->cpus_allowed)) { + if (!cpumask_empty(tsk_cpus_allowed(current)) && + !cpumask_full(tsk_cpus_allowed(current))) { int ncpus = num_online_cpus(), curcpu = -1, nset = 0; - for (i = 0; i < ncpus; i++) - if (cpumask_test_cpu(i, ¤t->cpus_allowed)) { + get_online_cpus(); + for_each_online_cpu(i) + if (cpumask_test_cpu(i, tsk_cpus_allowed(current))) { ipath_cdbg(PROC, "%s[%u] affinity set for " "cpu %d/%d\n", current->comm, current->pid, i, ncpus); curcpu = i; nset++; } + put_online_cpus(); if (curcpu != -1 && nset != ncpus) { if (npresent) { prefunit = curcpu / (ncpus / npresent);