diff options
Diffstat (limited to 'debian/patches-rt/0204-mm-slub-Make-object_map_lock-a-raw_spinlock_t.patch')
| -rw-r--r-- | debian/patches-rt/0204-mm-slub-Make-object_map_lock-a-raw_spinlock_t.patch | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/debian/patches-rt/0204-mm-slub-Make-object_map_lock-a-raw_spinlock_t.patch b/debian/patches-rt/0204-mm-slub-Make-object_map_lock-a-raw_spinlock_t.patch new file mode 100644 index 000000000..28c14ea49 --- /dev/null +++ b/debian/patches-rt/0204-mm-slub-Make-object_map_lock-a-raw_spinlock_t.patch @@ -0,0 +1,50 @@ +From d2d45bd13ad6112afefb224d46501b76473196eb Mon Sep 17 00:00:00 2001 +From: Sebastian Andrzej Siewior <bigeasy@linutronix.de> +Date: Thu, 16 Jul 2020 18:47:50 +0200 +Subject: [PATCH 204/323] mm/slub: Make object_map_lock a raw_spinlock_t +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/5.10/older/patches-5.10.204-rt100.tar.xz + +The variable object_map is protected by object_map_lock. The lock is always +acquired in debug code and within already atomic context + +Make object_map_lock a raw_spinlock_t. + +Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> +--- + mm/slub.c | 6 +++--- + 1 file changed, 3 insertions(+), 3 deletions(-) + +diff --git a/mm/slub.c b/mm/slub.c +index 57c598dd7454..ac2ddf6a4220 100644 +--- a/mm/slub.c ++++ b/mm/slub.c +@@ -435,7 +435,7 @@ static inline bool cmpxchg_double_slab(struct kmem_cache *s, struct page *page, + + #ifdef CONFIG_SLUB_DEBUG + static unsigned long object_map[BITS_TO_LONGS(MAX_OBJS_PER_PAGE)]; +-static DEFINE_SPINLOCK(object_map_lock); ++static DEFINE_RAW_SPINLOCK(object_map_lock); + + /* + * Determine a map of object in use on a page. +@@ -451,7 +451,7 @@ static unsigned long *get_map(struct kmem_cache *s, struct page *page) + + VM_BUG_ON(!irqs_disabled()); + +- spin_lock(&object_map_lock); ++ raw_spin_lock(&object_map_lock); + + bitmap_zero(object_map, page->objects); + +@@ -464,7 +464,7 @@ static unsigned long *get_map(struct kmem_cache *s, struct page *page) + static void put_map(unsigned long *map) __releases(&object_map_lock) + { + VM_BUG_ON(map != object_map); +- spin_unlock(&object_map_lock); ++ raw_spin_unlock(&object_map_lock); + } + + static inline unsigned int size_from_object(struct kmem_cache *s) +-- +2.43.0 + |