diff options
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/fs.h | 2 | ||||
| -rw-r--r-- | include/linux/slab.h | 9 |
2 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h index af8bbd4eeb3a..58c91a52cad1 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1011,6 +1011,7 @@ static inline int ra_has_index(struct file_ra_state *ra, pgoff_t index) * @f_task_work: task work entry point * @f_llist: work queue entrypoint * @f_ra: file's readahead state + * @f_freeptr: Pointer used by SLAB_TYPESAFE_BY_RCU file cache (don't touch.) */ struct file { atomic_long_t f_count; @@ -1042,6 +1043,7 @@ struct file { struct callback_head f_task_work; struct llist_node f_llist; struct file_ra_state f_ra; + freeptr_t f_freeptr; }; /* --- cacheline 3 boundary (192 bytes) --- */ } __randomize_layout diff --git a/include/linux/slab.h b/include/linux/slab.h index eb2bf4629157..5b2da2cf31a8 100644 --- a/include/linux/slab.h +++ b/include/linux/slab.h @@ -213,6 +213,12 @@ enum _slab_flag_bits { #endif /* + * freeptr_t represents a SLUB freelist pointer, which might be encoded + * and not dereferenceable if CONFIG_SLAB_FREELIST_HARDENED is enabled. + */ +typedef struct { unsigned long v; } freeptr_t; + +/* * ZERO_SIZE_PTR will be returned for zero sized kmalloc requests. * * Dereferencing ZERO_SIZE_PTR will lead to a distinct access fault. @@ -242,6 +248,9 @@ struct kmem_cache *kmem_cache_create_usercopy(const char *name, slab_flags_t flags, unsigned int useroffset, unsigned int usersize, void (*ctor)(void *)); +struct kmem_cache *kmem_cache_create_rcu(const char *name, unsigned int size, + unsigned int freeptr_offset, + slab_flags_t flags); void kmem_cache_destroy(struct kmem_cache *s); int kmem_cache_shrink(struct kmem_cache *s); |