From 4950276672fce5c241857540f8561c440663673d Mon Sep 17 00:00:00 2001 From: "Levin, Alexander (Sasha Levin)" Date: Wed, 15 Nov 2017 17:35:51 -0800 Subject: kmemcheck: remove annotations Patch series "kmemcheck: kill kmemcheck", v2. As discussed at LSF/MM, kill kmemcheck. KASan is a replacement that is able to work without the limitation of kmemcheck (single CPU, slow). KASan is already upstream. We are also not aware of any users of kmemcheck (or users who don't consider KASan as a suitable replacement). The only objection was that since KASAN wasn't supported by all GCC versions provided by distros at that time we should hold off for 2 years, and try again. Now that 2 years have passed, and all distros provide gcc that supports KASAN, kill kmemcheck again for the very same reasons. This patch (of 4): Remove kmemcheck annotations, and calls to kmemcheck from the kernel. [alexander.levin@verizon.com: correctly remove kmemcheck call from dma_map_sg_attrs] Link: http://lkml.kernel.org/r/20171012192151.26531-1-alexander.levin@verizon.com Link: http://lkml.kernel.org/r/20171007030159.22241-2-alexander.levin@verizon.com Signed-off-by: Sasha Levin Cc: Alexander Potapenko Cc: Eric W. Biederman Cc: Michal Hocko Cc: Pekka Enberg Cc: Steven Rostedt Cc: Tim Hansen Cc: Vegard Nossum Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- net/core/skbuff.c | 5 ----- net/core/sock.c | 2 -- 2 files changed, 7 deletions(-) (limited to 'net/core') diff --git a/net/core/skbuff.c b/net/core/skbuff.c index e140ba49b30a..6cd057b41f34 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -41,7 +41,6 @@ #include #include #include -#include #include #include #include @@ -234,14 +233,12 @@ struct sk_buff *__alloc_skb(unsigned int size, gfp_t gfp_mask, shinfo = skb_shinfo(skb); memset(shinfo, 0, offsetof(struct skb_shared_info, dataref)); atomic_set(&shinfo->dataref, 1); - kmemcheck_annotate_variable(shinfo->destructor_arg); if (flags & SKB_ALLOC_FCLONE) { struct sk_buff_fclones *fclones; fclones = container_of(skb, struct sk_buff_fclones, skb1); - kmemcheck_annotate_bitfield(&fclones->skb2, flags1); skb->fclone = SKB_FCLONE_ORIG; refcount_set(&fclones->fclone_ref, 1); @@ -301,7 +298,6 @@ struct sk_buff *__build_skb(void *data, unsigned int frag_size) shinfo = skb_shinfo(skb); memset(shinfo, 0, offsetof(struct skb_shared_info, dataref)); atomic_set(&shinfo->dataref, 1); - kmemcheck_annotate_variable(shinfo->destructor_arg); return skb; } @@ -1283,7 +1279,6 @@ struct sk_buff *skb_clone(struct sk_buff *skb, gfp_t gfp_mask) if (!n) return NULL; - kmemcheck_annotate_bitfield(n, flags1); n->fclone = SKB_FCLONE_UNAVAILABLE; } diff --git a/net/core/sock.c b/net/core/sock.c index 415f441c63b9..78401fa33ce8 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -1469,8 +1469,6 @@ static struct sock *sk_prot_alloc(struct proto *prot, gfp_t priority, sk = kmalloc(prot->obj_size, priority); if (sk != NULL) { - kmemcheck_annotate_bitfield(sk, flags); - if (security_sk_alloc(sk, family, priority)) goto out_free; -- cgit v1.2.3