Drop flex_arrays

All existing users have been converted to generic radix trees

Link: http://lkml.kernel.org/r/20181217131929.11727-8-kent.overstreet@gmail.com
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Acked-by: Dave Hansen <dave.hansen@intel.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Eric Paris <eparis@parisplace.org>
Cc: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Neil Horman <nhorman@tuxdriver.com>
Cc: Paul Moore <paul@paul-moore.com>
Cc: Pravin B Shelar <pshelar@ovn.org>
Cc: Shaohua Li <shli@kernel.org>
Cc: Stephen Smalley <sds@tycho.nsa.gov>
Cc: Vlad Yasevich <vyasevich@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2 files changed, 0 insertions, 152 deletions

diff --git a/include/linux/flex_array.h b/include/linux/flex_array.h
deleted file mode 100644
index b94fa61b51fb..000000000000
--- a/include/linux/flex_array.h
+++ /dev/null
@@ -1,149 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _FLEX_ARRAY_H
-#define _FLEX_ARRAY_H
-
-#include <linux/types.h>
-#include <linux/reciprocal_div.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;
-			struct reciprocal_value 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));	\
-	}
-
-/**
- * flex_array_alloc() - Creates a flexible array.
- * @element_size:	individual object size.
- * @total:		maximum number of objects which can be stored.
- * @flags:		GFP flags
- *
- * Return:		Returns an object of structure flex_array.
- */
-struct flex_array *flex_array_alloc(int element_size, unsigned int total,
-		gfp_t flags);
-
-/**
- * flex_array_prealloc() - Ensures that memory for the elements indexed in the
- * range defined by start and nr_elements has been allocated.
- * @fa:			array to allocate memory to.
- * @start:		start address
- * @nr_elements:	number of elements to be allocated.
- * @flags:		GFP flags
- *
- */
-int flex_array_prealloc(struct flex_array *fa, unsigned int start,
-		unsigned int nr_elements, gfp_t flags);
-
-/**
- * flex_array_free() - Removes all elements of a flexible array.
- * @fa:		array to be freed.
- */
-void flex_array_free(struct flex_array *fa);
-
-/**
- * flex_array_free_parts() - Removes all elements of a flexible array, but
- * leaves the array itself in place.
- * @fa:		array to be emptied.
- */
-void flex_array_free_parts(struct flex_array *fa);
-
-/**
- * flex_array_put() - Stores data into a flexible array.
- * @fa:		array where element is to be stored.
- * @element_nr:	position to copy, must be less than the maximum specified when
- *		the array was created.
- * @src:	data source to be copied into the array.
- * @flags:	GFP flags
- *
- * Return:	Returns zero on success, a negative error code otherwise.
- */
-int flex_array_put(struct flex_array *fa, unsigned int element_nr, void *src,
-		gfp_t flags);
-
-/**
- * flex_array_clear() - Clears an individual element in the array, sets the
- * given element to FLEX_ARRAY_FREE.
- * @element_nr:	element position to clear.
- * @fa:		array to which element to be cleared belongs.
- *
- * Return:	Returns zero on success, -EINVAL otherwise.
- */
-int flex_array_clear(struct flex_array *fa, unsigned int element_nr);
-
-/**
- * flex_array_get() - Retrieves data into a flexible array.
- *
- * @element_nr:	Element position to retrieve data from.
- * @fa:		array from which data is to be retrieved.
- *
- * Return:	Returns a pointer to the data element, or NULL if that
- *		particular element has never been allocated.
- */
-void *flex_array_get(struct flex_array *fa, unsigned int element_nr);
-
-/**
- * flex_array_shrink() - Reduces the allocated size of an array.
- * @fa:		array to shrink.
- *
- * Return:	Returns number of pages of memory actually freed.
- *
- */
-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 */
diff --git a/include/linux/poison.h b/include/linux/poison.h
index 5046bad0c1c5..d6d980a681c7 100644
--- a/include/linux/poison.h
+++ b/include/linux/poison.h
@@ -83,9 +83,6 @@
 #define MUTEX_DEBUG_FREE	0x22
 #define MUTEX_POISON_WW_CTX	((void *) 0x500 + POISON_POINTER_DELTA)
 
-/********** lib/flex_array.c **********/
-#define FLEX_ARRAY_FREE	0x6c	/* for use-after-free poisoning */
-
 /********** security/ **********/
 #define KEY_DESTROY		0xbd