From: Thomas Gleixner Date: Fri, 3 Jul 2009 08:44:34 -0500 Subject: [PATCH 063/353] mm/scatterlist: Do not disable irqs on RT Origin: https://git.kernel.org/cgit/linux/kernel/git/rt/linux-stable-rt.git/commit?id=7ed7cd17a5a82c9c8339c813f8349b672892703e For -RT it is enough to keep pagefault disabled (which is currently handled by kmap_atomic()). Signed-off-by: Thomas Gleixner --- lib/scatterlist.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/lib/scatterlist.c b/lib/scatterlist.c index 3b859201f84c..093c3aa3d895 100644 --- a/lib/scatterlist.c +++ b/lib/scatterlist.c @@ -777,7 +777,7 @@ void sg_miter_stop(struct sg_mapping_iter *miter) flush_kernel_dcache_page(miter->page); if (miter->__flags & SG_MITER_ATOMIC) { - WARN_ON_ONCE(preemptible()); + WARN_ON_ONCE(!pagefault_disabled()); kunmap_atomic(miter->addr); } else kunmap(miter->page);