diff options
Diffstat (limited to 'ANDROID_3.4.5/include/linux/flex_array.h')
-rw-r--r-- | ANDROID_3.4.5/include/linux/flex_array.h | 80 |
1 files changed, 0 insertions, 80 deletions
diff --git a/ANDROID_3.4.5/include/linux/flex_array.h b/ANDROID_3.4.5/include/linux/flex_array.h deleted file mode 100644 index 6843cf19..00000000 --- a/ANDROID_3.4.5/include/linux/flex_array.h +++ /dev/null @@ -1,80 +0,0 @@ -#ifndef _FLEX_ARRAY_H -#define _FLEX_ARRAY_H - -#include <linux/types.h> -#include <asm/page.h> - -#define FLEX_ARRAY_PART_SIZE PAGE_SIZE -#define FLEX_ARRAY_BASE_SIZE PAGE_SIZE - -struct flex_array_part; - -/* - * This is meant to replace cases where an array-like - * structure has gotten too big to fit into kmalloc() - * and the developer is getting tempted to use - * vmalloc(). - */ - -struct flex_array { - union { - struct { - int element_size; - int total_nr_elements; - int elems_per_part; - u32 reciprocal_elems; - struct flex_array_part *parts[]; - }; - /* - * This little trick makes sure that - * sizeof(flex_array) == PAGE_SIZE - */ - char padding[FLEX_ARRAY_BASE_SIZE]; - }; -}; - -/* Number of bytes left in base struct flex_array, excluding metadata */ -#define FLEX_ARRAY_BASE_BYTES_LEFT \ - (FLEX_ARRAY_BASE_SIZE - offsetof(struct flex_array, parts)) - -/* Number of pointers in base to struct flex_array_part pages */ -#define FLEX_ARRAY_NR_BASE_PTRS \ - (FLEX_ARRAY_BASE_BYTES_LEFT / sizeof(struct flex_array_part *)) - -/* Number of elements of size that fit in struct flex_array_part */ -#define FLEX_ARRAY_ELEMENTS_PER_PART(size) \ - (FLEX_ARRAY_PART_SIZE / size) - -/* - * Defines a statically allocated flex array and ensures its parameters are - * valid. - */ -#define DEFINE_FLEX_ARRAY(__arrayname, __element_size, __total) \ - struct flex_array __arrayname = { { { \ - .element_size = (__element_size), \ - .total_nr_elements = (__total), \ - } } }; \ - static inline void __arrayname##_invalid_parameter(void) \ - { \ - BUILD_BUG_ON((__total) > FLEX_ARRAY_NR_BASE_PTRS * \ - FLEX_ARRAY_ELEMENTS_PER_PART(__element_size)); \ - } - -struct flex_array *flex_array_alloc(int element_size, unsigned int total, - gfp_t flags); -int flex_array_prealloc(struct flex_array *fa, unsigned int start, - unsigned int nr_elements, gfp_t flags); -void flex_array_free(struct flex_array *fa); -void flex_array_free_parts(struct flex_array *fa); -int flex_array_put(struct flex_array *fa, unsigned int element_nr, void *src, - gfp_t flags); -int flex_array_clear(struct flex_array *fa, unsigned int element_nr); -void *flex_array_get(struct flex_array *fa, unsigned int element_nr); -int flex_array_shrink(struct flex_array *fa); - -#define flex_array_put_ptr(fa, nr, src, gfp) \ - flex_array_put(fa, nr, (void *)&(src), gfp) - -void *flex_array_get_ptr(struct flex_array *fa, unsigned int element_nr); - -#endif /* _FLEX_ARRAY_H */ |