Adding debian version 6.1.76-1.debian/6.1.76-1

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

1 files changed, 100 insertions, 0 deletions

diff --git a/debian/patches-rt/0017-zram-Replace-bit-spinlocks-with-spinlock_t-for-PREEM.patch b/debian/patches-rt/0017-zram-Replace-bit-spinlocks-with-spinlock_t-for-PREEM.patch
new file mode 100644
index 000000000..b3f1a71bc
--- /dev/null
+++ b/debian/patches-rt/0017-zram-Replace-bit-spinlocks-with-spinlock_t-for-PREEM.patch
@@ -0,0 +1,100 @@
+From 8397109d43ef57d5e91d738354b9c30f49cb2f95 Mon Sep 17 00:00:00 2001
+From: Mike Galbraith <umgwanakikbuti@gmail.com>
+Date: Thu, 31 Mar 2016 04:08:28 +0200
+Subject: [PATCH 17/62] zram: Replace bit spinlocks with spinlock_t for
+ PREEMPT_RT.
+Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/6.1/older/patches-6.1.69-rt21.tar.xz
+
+The bit spinlock disables preemption on PREEMPT_RT. With disabled preemption it
+is not allowed to acquire other sleeping locks which includes invoking
+zs_free().
+
+Use a spinlock_t on PREEMPT_RT for locking and set/ clear ZRAM_LOCK after the
+lock has been acquired/ dropped.
+
+Signed-off-by: Mike Galbraith <umgwanakikbuti@gmail.com>
+Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
+Link: https://lkml.kernel.org/r/YqIbMuHCPiQk+Ac2@linutronix.de
+---
+ drivers/block/zram/zram_drv.c | 36 +++++++++++++++++++++++++++++++++++
+ drivers/block/zram/zram_drv.h |  3 +++
+ 2 files changed, 39 insertions(+)
+
+diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c
+index 966aab902d19..ee69e4443691 100644
+--- a/drivers/block/zram/zram_drv.c
++++ b/drivers/block/zram/zram_drv.c
+@@ -57,6 +57,40 @@ static void zram_free_page(struct zram *zram, size_t index);
+ static int zram_bvec_read(struct zram *zram, struct bio_vec *bvec,
+ 				u32 index, int offset, struct bio *bio);
+ 
++#ifdef CONFIG_PREEMPT_RT
++static void zram_meta_init_table_locks(struct zram *zram, size_t num_pages)
++{
++	size_t index;
++
++	for (index = 0; index < num_pages; index++)
++		spin_lock_init(&zram->table[index].lock);
++}
++
++static int zram_slot_trylock(struct zram *zram, u32 index)
++{
++	int ret;
++
++	ret = spin_trylock(&zram->table[index].lock);
++	if (ret)
++		__set_bit(ZRAM_LOCK, &zram->table[index].flags);
++	return ret;
++}
++
++static void zram_slot_lock(struct zram *zram, u32 index)
++{
++	spin_lock(&zram->table[index].lock);
++	__set_bit(ZRAM_LOCK, &zram->table[index].flags);
++}
++
++static void zram_slot_unlock(struct zram *zram, u32 index)
++{
++	__clear_bit(ZRAM_LOCK, &zram->table[index].flags);
++	spin_unlock(&zram->table[index].lock);
++}
++
++#else
++
++static void zram_meta_init_table_locks(struct zram *zram, size_t num_pages) { }
+ 
+ static int zram_slot_trylock(struct zram *zram, u32 index)
+ {
+@@ -72,6 +106,7 @@ static void zram_slot_unlock(struct zram *zram, u32 index)
+ {
+ 	bit_spin_unlock(ZRAM_LOCK, &zram->table[index].flags);
+ }
++#endif
+ 
+ static inline bool init_done(struct zram *zram)
+ {
+@@ -1187,6 +1222,7 @@ static bool zram_meta_alloc(struct zram *zram, u64 disksize)
+ 
+ 	if (!huge_class_size)
+ 		huge_class_size = zs_huge_class_size(zram->mem_pool);
++	zram_meta_init_table_locks(zram, num_pages);
+ 	return true;
+ }
+ 
+diff --git a/drivers/block/zram/zram_drv.h b/drivers/block/zram/zram_drv.h
+index a2bda53020fd..ae7950b26db5 100644
+--- a/drivers/block/zram/zram_drv.h
++++ b/drivers/block/zram/zram_drv.h
+@@ -62,6 +62,9 @@ struct zram_table_entry {
+ 		unsigned long element;
+ 	};
+ 	unsigned long flags;
++#ifdef CONFIG_PREEMPT_RT
++	spinlock_t lock;
++#endif
+ #ifdef CONFIG_ZRAM_MEMORY_TRACKING
+ 	ktime_t ac_time;
+ #endif
+-- 
+2.43.0
+