diff options
Diffstat (limited to 'features/rt/mm-scatterlist-Do-not-disable-irqs-on-RT.patch')
| -rw-r--r-- | features/rt/mm-scatterlist-Do-not-disable-irqs-on-RT.patch | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/features/rt/mm-scatterlist-Do-not-disable-irqs-on-RT.patch b/features/rt/mm-scatterlist-Do-not-disable-irqs-on-RT.patch new file mode 100644 index 00000000..de9d9047 --- /dev/null +++ b/features/rt/mm-scatterlist-Do-not-disable-irqs-on-RT.patch @@ -0,0 +1,29 @@ +From e548a9846277b0cf05cd81fc6441d578728d20f3 Mon Sep 17 00:00:00 2001 +From: Thomas Gleixner <tglx@linutronix.de> +Date: Fri, 3 Jul 2009 08:44:34 -0500 +Subject: [PATCH 162/191] mm/scatterlist: Do not disable irqs on RT + +For -RT it is enough to keep pagefault disabled (which is currently handled by +kmap_atomic()). + +Signed-off-by: Thomas Gleixner <tglx@linutronix.de> +--- + lib/scatterlist.c | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +diff --git a/lib/scatterlist.c b/lib/scatterlist.c +index a59778946404..907f59045998 100644 +--- a/lib/scatterlist.c ++++ b/lib/scatterlist.c +@@ -892,7 +892,7 @@ 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); +-- +2.19.1 + |