Adding debian version 4.19.249-2.debian/4.19.249-2debian

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 97 insertions, 0 deletions

diff --git a/debian/patches-rt/0261-powerpc-pseries-iommu-Use-a-locallock-instead-local_.patch b/debian/patches-rt/0261-powerpc-pseries-iommu-Use-a-locallock-instead-local_.patch
new file mode 100644
index 000000000..f86ebc321
--- /dev/null
+++ b/debian/patches-rt/0261-powerpc-pseries-iommu-Use-a-locallock-instead-local_.patch
@@ -0,0 +1,97 @@
+From 0e0334043fc179c95449e93c201474b96f1f8656 Mon Sep 17 00:00:00 2001
+From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
+Date: Tue, 26 Mar 2019 18:31:54 +0100
+Subject: [PATCH 261/347] powerpc/pseries/iommu: Use a locallock instead
+ local_irq_save()
+Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.246-rt110.tar.xz
+
+The locallock protects the per-CPU variable tce_page. The function
+attempts to allocate memory while tce_page is protected (by disabling
+interrupts).
+
+Use local_irq_save() instead of local_irq_disable().
+
+Cc: stable-rt@vger.kernel.org
+Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
+Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
+---
+ arch/powerpc/platforms/pseries/iommu.c | 16 ++++++++++------
+ 1 file changed, 10 insertions(+), 6 deletions(-)
+
+diff --git a/arch/powerpc/platforms/pseries/iommu.c b/arch/powerpc/platforms/pseries/iommu.c
+index b1a08cb760e0..8ef818ad83ec 100644
+--- a/arch/powerpc/platforms/pseries/iommu.c
++++ b/arch/powerpc/platforms/pseries/iommu.c
+@@ -38,6 +38,7 @@
+ #include <linux/of.h>
+ #include <linux/iommu.h>
+ #include <linux/rculist.h>
++#include <linux/locallock.h>
+ #include <asm/io.h>
+ #include <asm/prom.h>
+ #include <asm/rtas.h>
+@@ -212,6 +213,7 @@ static int tce_build_pSeriesLP(unsigned long liobn, long tcenum, long tceshift,
+ }
+ 
+ static DEFINE_PER_CPU(__be64 *, tce_page);
++static DEFINE_LOCAL_IRQ_LOCK(tcp_page_lock);
+ 
+ static int tce_buildmulti_pSeriesLP(struct iommu_table *tbl, long tcenum,
+ 				     long npages, unsigned long uaddr,
+@@ -233,7 +235,8 @@ static int tce_buildmulti_pSeriesLP(struct iommu_table *tbl, long tcenum,
+ 		                           direction, attrs);
+ 	}
+ 
+-	local_irq_save(flags);	/* to protect tcep and the page behind it */
++	/* to protect tcep and the page behind it */
++	local_lock_irqsave(tcp_page_lock, flags);
+ 
+ 	tcep = __this_cpu_read(tce_page);
+ 
+@@ -244,7 +247,7 @@ static int tce_buildmulti_pSeriesLP(struct iommu_table *tbl, long tcenum,
+ 		tcep = (__be64 *)__get_free_page(GFP_ATOMIC);
+ 		/* If allocation fails, fall back to the loop implementation */
+ 		if (!tcep) {
+-			local_irq_restore(flags);
++			local_unlock_irqrestore(tcp_page_lock, flags);
+ 			return tce_build_pSeriesLP(tbl->it_index, tcenum,
+ 					tbl->it_page_shift,
+ 					npages, uaddr, direction, attrs);
+@@ -279,7 +282,7 @@ static int tce_buildmulti_pSeriesLP(struct iommu_table *tbl, long tcenum,
+ 		tcenum += limit;
+ 	} while (npages > 0 && !rc);
+ 
+-	local_irq_restore(flags);
++	local_unlock_irqrestore(tcp_page_lock, flags);
+ 
+ 	if (unlikely(rc == H_NOT_ENOUGH_RESOURCES)) {
+ 		ret = (int)rc;
+@@ -450,13 +453,14 @@ static int tce_setrange_multi_pSeriesLP(unsigned long start_pfn,
+ 				DMA_BIDIRECTIONAL, 0);
+ 	}
+ 
+-	local_irq_disable();	/* to protect tcep and the page behind it */
++	/* to protect tcep and the page behind it */
++	local_lock_irq(tcp_page_lock);
+ 	tcep = __this_cpu_read(tce_page);
+ 
+ 	if (!tcep) {
+ 		tcep = (__be64 *)__get_free_page(GFP_ATOMIC);
+ 		if (!tcep) {
+-			local_irq_enable();
++			local_unlock_irq(tcp_page_lock);
+ 			return -ENOMEM;
+ 		}
+ 		__this_cpu_write(tce_page, tcep);
+@@ -502,7 +506,7 @@ static int tce_setrange_multi_pSeriesLP(unsigned long start_pfn,
+ 
+ 	/* error cleanup: caller will clear whole range */
+ 
+-	local_irq_enable();
++	local_unlock_irq(tcp_page_lock);
+ 	return rc;
+ }
+ 
+-- 
+2.36.1
+