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slab, slub, slob: add slab_flags_t

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Add sparse-checked slab_flags_t for struct kmem_cache::flags (SLAB_POISON,
etc).

SLAB is bloated temporarily by switching to "unsigned long", but only
temporarily.

Link: http://lkml.kernel.org/r/20171021100225.GA22428@avx2
Signed-off-by: Alexey Dobriyan <[email protected]>
Acked-by: Pekka Enberg <[email protected]>
Cc: Christoph Lameter <[email protected]>
Cc: David Rientjes <[email protected]>
Cc: Joonsoo Kim <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Alexey Dobriyan 2017-11-15 17:32:18 -08:00 • committed by Linus Torvalds
commit d50112edde
15 changed files with 97 additions and 81 deletions
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26
mm/slub.c
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@ -193,8 +193,10 @@ static inline bool kmem_cache_has_cpu_partial(struct kmem_cache *s)
#define MAX_OBJS_PER_PAGE 32767 /* since page.objects is u15 */
/* Internal SLUB flags */
#define __OBJECT_POISON 0x80000000UL /* Poison object */
#define __CMPXCHG_DOUBLE 0x40000000UL /* Use cmpxchg_double */
/* Poison object */
#define __OBJECT_POISON ((slab_flags_t __force)0x80000000UL)
/* Use cmpxchg_double */
#define __CMPXCHG_DOUBLE ((slab_flags_t __force)0x40000000UL)
/*
* Tracking user of a slab.
@ -485,9 +487,9 @@ static inline void *restore_red_left(struct kmem_cache *s, void *p)
* Debug settings:
*/
#if defined(CONFIG_SLUB_DEBUG_ON)
static int slub_debug = DEBUG_DEFAULT_FLAGS;
static slab_flags_t slub_debug = DEBUG_DEFAULT_FLAGS;
#else
static int slub_debug;
static slab_flags_t slub_debug;
#endif
static char *slub_debug_slabs;
@ -1289,8 +1291,8 @@ out:
__setup("slub_debug", setup_slub_debug);
unsigned long kmem_cache_flags(unsigned long object_size,
unsigned long flags, const char *name,
slab_flags_t kmem_cache_flags(unsigned long object_size,
slab_flags_t flags, const char *name,
void (*ctor)(void *))
{
/*
@ -1322,8 +1324,8 @@ static inline void add_full(struct kmem_cache *s, struct kmem_cache_node *n,
struct page *page) {}
static inline void remove_full(struct kmem_cache *s, struct kmem_cache_node *n,
struct page *page) {}
unsigned long kmem_cache_flags(unsigned long object_size,
unsigned long flags, const char *name,
slab_flags_t kmem_cache_flags(unsigned long object_size,
slab_flags_t flags, const char *name,
void (*ctor)(void *))
{
return flags;
@ -3477,7 +3479,7 @@ static void set_cpu_partial(struct kmem_cache *s)
*/
static int calculate_sizes(struct kmem_cache *s, int forced_order)
{
unsigned long flags = s->flags;
slab_flags_t flags = s->flags;
size_t size = s->object_size;
int order;
@ -3593,7 +3595,7 @@ static int calculate_sizes(struct kmem_cache *s, int forced_order)
return !!oo_objects(s->oo);
}
static int kmem_cache_open(struct kmem_cache *s, unsigned long flags)
static int kmem_cache_open(struct kmem_cache *s, slab_flags_t flags)
{
s->flags = kmem_cache_flags(s->size, flags, s->name, s->ctor);
s->reserved = 0;
@ -4245,7 +4247,7 @@ void __init kmem_cache_init_late(void)
struct kmem_cache *
__kmem_cache_alias(const char *name, size_t size, size_t align,
unsigned long flags, void (*ctor)(void *))
slab_flags_t flags, void (*ctor)(void *))
{
struct kmem_cache *s, *c;
@ -4275,7 +4277,7 @@ __kmem_cache_alias(const char *name, size_t size, size_t align,
return s;
}
int __kmem_cache_create(struct kmem_cache *s, unsigned long flags)
int __kmem_cache_create(struct kmem_cache *s, slab_flags_t flags)
{
int err;