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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 <adobriyan@gmail.com>
Acked-by: Pekka Enberg <penberg@kernel.org>
Cc: Christoph Lameter <cl@linux.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alexey Dobriyan
2017-11-15 17:32:18 -08:00
committed by Linus Torvalds
parent a3ba074447
commit d50112edde
15 changed files with 97 additions and 81 deletions
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23
mm/slab.c
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@@ -252,8 +252,8 @@ static void kmem_cache_node_init(struct kmem_cache_node *parent)
MAKE_LIST((cachep), (&(ptr)->slabs_free), slabs_free, nodeid); \
} while (0)
#define CFLGS_OBJFREELIST_SLAB (0x40000000UL)
#define CFLGS_OFF_SLAB (0x80000000UL)
#define CFLGS_OBJFREELIST_SLAB ((slab_flags_t __force)0x40000000UL)
#define CFLGS_OFF_SLAB ((slab_flags_t __force)0x80000000UL)
#define OBJFREELIST_SLAB(x) ((x)->flags & CFLGS_OBJFREELIST_SLAB)
#define OFF_SLAB(x) ((x)->flags & CFLGS_OFF_SLAB)
@@ -441,7 +441,7 @@ static inline struct array_cache *cpu_cache_get(struct kmem_cache *cachep)
* Calculate the number of objects and left-over bytes for a given buffer size.
*/
static unsigned int cache_estimate(unsigned long gfporder, size_t buffer_size,
unsigned long flags, size_t *left_over)
slab_flags_t flags, size_t *left_over)
{
unsigned int num;
size_t slab_size = PAGE_SIZE << gfporder;
@@ -1759,7 +1759,7 @@ static void slabs_destroy(struct kmem_cache *cachep, struct list_head *list)
* towards high-order requests, this should be changed.
*/
static size_t calculate_slab_order(struct kmem_cache *cachep,
size_t size, unsigned long flags)
size_t size, slab_flags_t flags)
{
size_t left_over = 0;
int gfporder;
@@ -1886,8 +1886,8 @@ static int __ref setup_cpu_cache(struct kmem_cache *cachep, gfp_t gfp)
return 0;
}
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;
@@ -1895,7 +1895,7 @@ unsigned long kmem_cache_flags(unsigned long object_size,
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 *cachep;
@@ -1913,7 +1913,7 @@ __kmem_cache_alias(const char *name, size_t size, size_t align,
}
static bool set_objfreelist_slab_cache(struct kmem_cache *cachep,
size_t size, unsigned long flags)
size_t size, slab_flags_t flags)
{
size_t left;
@@ -1936,7 +1936,7 @@ static bool set_objfreelist_slab_cache(struct kmem_cache *cachep,
}
static bool set_off_slab_cache(struct kmem_cache *cachep,
size_t size, unsigned long flags)
size_t size, slab_flags_t flags)
{
size_t left;
@@ -1970,7 +1970,7 @@ static bool set_off_slab_cache(struct kmem_cache *cachep,
}
static bool set_on_slab_cache(struct kmem_cache *cachep,
size_t size, unsigned long flags)
size_t size, slab_flags_t flags)
{
size_t left;
@@ -2006,8 +2006,7 @@ static bool set_on_slab_cache(struct kmem_cache *cachep,
* cacheline. This can be beneficial if you're counting cycles as closely
* as davem.
*/
int
__kmem_cache_create (struct kmem_cache *cachep, unsigned long flags)
int __kmem_cache_create(struct kmem_cache *cachep, slab_flags_t flags)
{
size_t ralign = BYTES_PER_WORD;
gfp_t gfp;