The patch titled
Subject: slab: make kmem_cache_create() work with 32-bit sizes
has been removed from the -mm tree. Its filename was
slab-make-kmem_cache_create-work-with-32-bit-sizes.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Alexey Dobriyan <adobriyan@xxxxxxxxx>
Subject: slab: make kmem_cache_create() work with 32-bit sizes
struct kmem_cache::size and ::align were always 32-bit.
Out of curiosity I created 4GB kmem_cache, it oopsed with division by 0.
kmem_cache_create(1UL<<32+1) created 1-byte cache as expected.
size_t doesn't work and never did.
Link: http://lkml.kernel.org/r/20180305200730.15812-6-adobriyan@xxxxxxxxx
Signed-off-by: Alexey Dobriyan <adobriyan@xxxxxxxxx>
Cc: Christoph Lameter <cl@xxxxxxxxx>
Cc: Pekka Enberg <penberg@xxxxxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Cc: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/slab.h | 7 ++++---
mm/slab.c | 2 +-
mm/slab.h | 6 +++---
mm/slab_common.c | 19 ++++++++++---------
mm/slub.c | 2 +-
5 files changed, 19 insertions(+), 17 deletions(-)
diff -puN include/linux/slab.h~slab-make-kmem_cache_create-work-with-32-bit-sizes include/linux/slab.h
--- a/include/linux/slab.h~slab-make-kmem_cache_create-work-with-32-bit-sizes
+++ a/include/linux/slab.h
@@ -137,11 +137,12 @@ bool slab_is_available(void);
extern bool usercopy_fallback;
-struct kmem_cache *kmem_cache_create(const char *name, size_t size,
- size_t align, slab_flags_t flags,
+struct kmem_cache *kmem_cache_create(const char *name, unsigned int size,
+ unsigned int align, slab_flags_t flags,
void (*ctor)(void *));
struct kmem_cache *kmem_cache_create_usercopy(const char *name,
- size_t size, size_t align, slab_flags_t flags,
+ unsigned int size, unsigned int align,
+ slab_flags_t flags,
size_t useroffset, size_t usersize,
void (*ctor)(void *));
void kmem_cache_destroy(struct kmem_cache *);
diff -puN mm/slab.c~slab-make-kmem_cache_create-work-with-32-bit-sizes mm/slab.c
--- a/mm/slab.c~slab-make-kmem_cache_create-work-with-32-bit-sizes
+++ a/mm/slab.c
@@ -1877,7 +1877,7 @@ slab_flags_t kmem_cache_flags(unsigned l
}
struct kmem_cache *
-__kmem_cache_alias(const char *name, size_t size, size_t align,
+__kmem_cache_alias(const char *name, unsigned int size, unsigned int align,
slab_flags_t flags, void (*ctor)(void *))
{
struct kmem_cache *cachep;
diff -puN mm/slab_common.c~slab-make-kmem_cache_create-work-with-32-bit-sizes mm/slab_common.c
--- a/mm/slab_common.c~slab-make-kmem_cache_create-work-with-32-bit-sizes
+++ a/mm/slab_common.c
@@ -82,7 +82,7 @@ unsigned int kmem_cache_size(struct kmem
EXPORT_SYMBOL(kmem_cache_size);
#ifdef CONFIG_DEBUG_VM
-static int kmem_cache_sanity_check(const char *name, size_t size)
+static int kmem_cache_sanity_check(const char *name, unsigned int size)
{
struct kmem_cache *s = NULL;
@@ -113,7 +113,7 @@ static int kmem_cache_sanity_check(const
return 0;
}
#else
-static inline int kmem_cache_sanity_check(const char *name, size_t size)
+static inline int kmem_cache_sanity_check(const char *name, unsigned int size)
{
return 0;
}
@@ -280,8 +280,8 @@ static inline void memcg_unlink_cache(st
* Figure out what the alignment of the objects will be given a set of
* flags, a user specified alignment and the size of the objects.
*/
-static unsigned long calculate_alignment(slab_flags_t flags,
- unsigned long align, unsigned long size)
+static unsigned int calculate_alignment(slab_flags_t flags,
+ unsigned int align, unsigned int size)
{
/*
* If the user wants hardware cache aligned objects then follow that
@@ -291,7 +291,7 @@ static unsigned long calculate_alignment
* alignment though. If that is greater then use it.
*/
if (flags & SLAB_HWCACHE_ALIGN) {
- unsigned long ralign;
+ unsigned int ralign;
ralign = cache_line_size();
while (size <= ralign / 2)
@@ -331,7 +331,7 @@ int slab_unmergeable(struct kmem_cache *
return 0;
}
-struct kmem_cache *find_mergeable(size_t size, size_t align,
+struct kmem_cache *find_mergeable(unsigned int size, unsigned int align,
slab_flags_t flags, const char *name, void (*ctor)(void *))
{
struct kmem_cache *s;
@@ -379,7 +379,7 @@ struct kmem_cache *find_mergeable(size_t
}
static struct kmem_cache *create_cache(const char *name,
- size_t object_size, size_t size, size_t align,
+ unsigned int object_size, unsigned int size, unsigned int align,
slab_flags_t flags, size_t useroffset,
size_t usersize, void (*ctor)(void *),
struct mem_cgroup *memcg, struct kmem_cache *root_cache)
@@ -452,7 +452,8 @@ out_free_cache:
* as davem.
*/
struct kmem_cache *
-kmem_cache_create_usercopy(const char *name, size_t size, size_t align,
+kmem_cache_create_usercopy(const char *name,
+ unsigned int size, unsigned int align,
slab_flags_t flags, size_t useroffset, size_t usersize,
void (*ctor)(void *))
{
@@ -532,7 +533,7 @@ out_unlock:
EXPORT_SYMBOL(kmem_cache_create_usercopy);
struct kmem_cache *
-kmem_cache_create(const char *name, size_t size, size_t align,
+kmem_cache_create(const char *name, unsigned int size, unsigned int align,
slab_flags_t flags, void (*ctor)(void *))
{
return kmem_cache_create_usercopy(name, size, align, flags, 0, 0,
diff -puN mm/slab.h~slab-make-kmem_cache_create-work-with-32-bit-sizes mm/slab.h
--- a/mm/slab.h~slab-make-kmem_cache_create-work-with-32-bit-sizes
+++ a/mm/slab.h
@@ -101,11 +101,11 @@ extern void create_boot_cache(struct kme
unsigned int useroffset, unsigned int usersize);
int slab_unmergeable(struct kmem_cache *s);
-struct kmem_cache *find_mergeable(size_t size, size_t align,
+struct kmem_cache *find_mergeable(unsigned size, unsigned align,
slab_flags_t flags, const char *name, void (*ctor)(void *));
#ifndef CONFIG_SLOB
struct kmem_cache *
-__kmem_cache_alias(const char *name, size_t size, size_t align,
+__kmem_cache_alias(const char *name, unsigned int size, unsigned int align,
slab_flags_t flags, void (*ctor)(void *));
slab_flags_t kmem_cache_flags(unsigned long object_size,
@@ -113,7 +113,7 @@ slab_flags_t kmem_cache_flags(unsigned l
void (*ctor)(void *));
#else
static inline struct kmem_cache *
-__kmem_cache_alias(const char *name, size_t size, size_t align,
+__kmem_cache_alias(const char *name, unsigned int size, unsigned int align,
slab_flags_t flags, void (*ctor)(void *))
{ return NULL; }
diff -puN mm/slub.c~slab-make-kmem_cache_create-work-with-32-bit-sizes mm/slub.c
--- a/mm/slub.c~slab-make-kmem_cache_create-work-with-32-bit-sizes
+++ a/mm/slub.c
@@ -4242,7 +4242,7 @@ void __init kmem_cache_init_late(void)
}
struct kmem_cache *
-__kmem_cache_alias(const char *name, size_t size, size_t align,
+__kmem_cache_alias(const char *name, unsigned int size, unsigned int align,
slab_flags_t flags, void (*ctor)(void *))
{
struct kmem_cache *s, *c;
_
Patches currently in -mm which might be from adobriyan@xxxxxxxxx are
proc-do-less-stuff-under-pde_unload_lock.patch
proc-move-proc-sysvipc-creation-to-where-it-belongs.patch
proc-faster-open-close-of-files-without-release-hook.patch
proc-randomize-struct-pde_opener.patch
proc-move-struct-pde_opener-to-kmem-cache.patch
proc-account-struct-pde_opener.patch
proc-check-permissions-earlier-for-proc-wchan.patch
proc-use-set_puts-at-proc-wchan.patch
proc-test-proc-self-wchan.patch
proc-test-proc-self-syscall.patch
proc-move-struct-proc_dir_entry-into-kmem-cache.patch
proc-fix-proc-map_files-lookup-some-more.patch
proc-register-filesystem-last.patch
proc-faster-proc-cmdline.patch
proc-do-mmput-asap-for-proc-map_files.patch
proc-revalidate-misc-dentries.patch
proc-test-last-field-of-proc-loadavg.patch
proc-reject-and-as-filenames.patch
proc-switch-struct-proc_dir_entry-count-to-refcount.patch
proc-shotgun-test-read-readdir-readlink-a-little-write.patch
proc-shotgun-test-read-readdir-readlink-a-little-write-fix.patch
proc-shotgun-test-read-readdir-readlink-a-little-write-fix-2.patch
proc-use-slower-rb_first.patch
proc-test-proc-uptime.patch
uts-create-struct-uts_namespace-from-kmem_cache.patch
seq_file-allocate-seq_file-from-kmem_cache.patch
seq_file-account-everything.patch
seq_file-delete-small-value-optimization.patch
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