2018-08-27 14:32:32 +00:00
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From: Thomas Gleixner <tglx@linutronix.de>
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Date: Fri, 3 Jul 2009 08:44:34 -0500
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Subject: mm/scatterlist: Do not disable irqs on RT
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2019-02-27 18:51:46 +00:00
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Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.25-rt16.tar.xz
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2018-08-27 14:32:32 +00:00
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For -RT it is enough to keep pagefault disabled (which is currently handled by
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kmap_atomic()).
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Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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---
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lib/scatterlist.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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--- a/lib/scatterlist.c
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+++ b/lib/scatterlist.c
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@@ -776,7 +776,7 @@ void sg_miter_stop(struct sg_mapping_ite
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flush_kernel_dcache_page(miter->page);
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if (miter->__flags & SG_MITER_ATOMIC) {
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- WARN_ON_ONCE(preemptible());
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+ WARN_ON_ONCE(!pagefault_disabled());
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kunmap_atomic(miter->addr);
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} else
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kunmap(miter->page);
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