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authorAnton Blanchard <anton@samba.org>2010-04-06 03:02:19 -0400
committerIngo Molnar <mingo@elte.hu>2010-04-06 04:01:35 -0400
commit84fba5ec91f11c0efb27d0ed6098f7447491f0df (patch)
treeca48cd8f7baddf29c2bcfc3cc0c7853298449f7b /kernel/sched.c
parentdb217dece3003df0841bacf9556b5c06aa097dae (diff)
sched: Fix sched_getaffinity()
taskset on 2.6.34-rc3 fails on one of my ppc64 test boxes with the following error: sched_getaffinity(0, 16, 0x10029650030) = -1 EINVAL (Invalid argument) This box has 128 threads and 16 bytes is enough to cover it. Commit cd3d8031eb4311e516329aee03c79a08333141f1 (sched: sched_getaffinity(): Allow less than NR_CPUS length) is comparing this 16 bytes agains nr_cpu_ids. Fix it by comparing nr_cpu_ids to the number of bits in the cpumask we pass in. Signed-off-by: Anton Blanchard <anton@samba.org> Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Sharyathi Nagesh <sharyath@in.ibm.com> Cc: Ulrich Drepper <drepper@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Jack Steiner <steiner@sgi.com> Cc: Russ Anderson <rja@sgi.com> Cc: Mike Travis <travis@sgi.com> LKML-Reference: <20100406070218.GM5594@kryten> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/sched.c')
-rw-r--r--kernel/sched.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/sched.c b/kernel/sched.c
index 528a10592c16..eaf5c7375dfd 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -4902,7 +4902,7 @@ SYSCALL_DEFINE3(sched_getaffinity, pid_t, pid, unsigned int, len,
4902 int ret; 4902 int ret;
4903 cpumask_var_t mask; 4903 cpumask_var_t mask;
4904 4904
4905 if (len < nr_cpu_ids) 4905 if ((len * BITS_PER_BYTE) < nr_cpu_ids)
4906 return -EINVAL; 4906 return -EINVAL;
4907 if (len & (sizeof(unsigned long)-1)) 4907 if (len & (sizeof(unsigned long)-1))
4908 return -EINVAL; 4908 return -EINVAL;