From 37dcc69ad17a008d2b720bdc39f070ef2a959430 Mon Sep 17 00:00:00 2001 From: Andrey Konovalov Date: Tue, 19 Dec 2023 23:28:59 +0100 Subject: mempool: introduce mempool_use_prealloc_only Introduce a new mempool_alloc_preallocated API that asks the mempool to only use the elements preallocated during the mempool's creation when allocating and to not attempt allocating new ones from the underlying allocator. This API is required to test the KASAN poisoning/unpoisoning functionality in KASAN tests, but it might be also useful on its own. Link: https://lkml.kernel.org/r/a14d809dbdfd04cc33bcacc632fee2abd6b83c00.1703024586.git.andreyknvl@google.com Signed-off-by: Andrey Konovalov Cc: Alexander Lobakin Cc: Alexander Potapenko Cc: Andrey Ryabinin Cc: Breno Leitao Cc: Dmitry Vyukov Cc: Evgenii Stepanov Cc: Marco Elver Signed-off-by: Andrew Morton --- include/linux/mempool.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux/mempool.h') diff --git a/include/linux/mempool.h b/include/linux/mempool.h index 4aae6c06c5f2..7be1e32e6d42 100644 --- a/include/linux/mempool.h +++ b/include/linux/mempool.h @@ -51,6 +51,7 @@ extern mempool_t *mempool_create_node(int min_nr, mempool_alloc_t *alloc_fn, extern int mempool_resize(mempool_t *pool, int new_min_nr); extern void mempool_destroy(mempool_t *pool); extern void *mempool_alloc(mempool_t *pool, gfp_t gfp_mask) __malloc; +extern void *mempool_alloc_preallocated(mempool_t *pool) __malloc; extern void mempool_free(void *element, mempool_t *pool); /* -- cgit