From 7d720c3e4f0c4fc152a6bf17e24244a3c85412d2 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Tue, 16 Feb 2010 15:20:26 +0000 Subject: percpu: add __percpu sparse annotations to net Add __percpu sparse annotations to net. These annotations are to make sparse consider percpu variables to be in a different address space and warn if accessed without going through percpu accessors. This patch doesn't affect normal builds. The macro and type tricks around snmp stats make things a bit interesting. DEFINE/DECLARE_SNMP_STAT() macros mark the target field as __percpu and SNMP_UPD_PO_STATS() macro is updated accordingly. All snmp_mib_*() users which used to cast the argument to (void **) are updated to cast it to (void __percpu **). Signed-off-by: Tejun Heo Acked-by: David S. Miller Cc: Patrick McHardy Cc: Arnaldo Carvalho de Melo Cc: Vlad Yasevich Cc: netdev@vger.kernel.org Signed-off-by: David S. Miller --- net/xfrm/xfrm_ipcomp.c | 16 ++++++++-------- net/xfrm/xfrm_policy.c | 6 +++--- net/xfrm/xfrm_proc.c | 3 ++- 3 files changed, 13 insertions(+), 12 deletions(-) (limited to 'net/xfrm') diff --git a/net/xfrm/xfrm_ipcomp.c b/net/xfrm/xfrm_ipcomp.c index 42cd18391f46..0fc5ff66d1fa 100644 --- a/net/xfrm/xfrm_ipcomp.c +++ b/net/xfrm/xfrm_ipcomp.c @@ -30,12 +30,12 @@ struct ipcomp_tfms { struct list_head list; - struct crypto_comp **tfms; + struct crypto_comp * __percpu *tfms; int users; }; static DEFINE_MUTEX(ipcomp_resource_mutex); -static void **ipcomp_scratches; +static void * __percpu *ipcomp_scratches; static int ipcomp_scratch_users; static LIST_HEAD(ipcomp_tfms_list); @@ -200,7 +200,7 @@ EXPORT_SYMBOL_GPL(ipcomp_output); static void ipcomp_free_scratches(void) { int i; - void **scratches; + void * __percpu *scratches; if (--ipcomp_scratch_users) return; @@ -215,10 +215,10 @@ static void ipcomp_free_scratches(void) free_percpu(scratches); } -static void **ipcomp_alloc_scratches(void) +static void * __percpu *ipcomp_alloc_scratches(void) { int i; - void **scratches; + void * __percpu *scratches; if (ipcomp_scratch_users++) return ipcomp_scratches; @@ -239,7 +239,7 @@ static void **ipcomp_alloc_scratches(void) return scratches; } -static void ipcomp_free_tfms(struct crypto_comp **tfms) +static void ipcomp_free_tfms(struct crypto_comp * __percpu *tfms) { struct ipcomp_tfms *pos; int cpu; @@ -267,10 +267,10 @@ static void ipcomp_free_tfms(struct crypto_comp **tfms) free_percpu(tfms); } -static struct crypto_comp **ipcomp_alloc_tfms(const char *alg_name) +static struct crypto_comp * __percpu *ipcomp_alloc_tfms(const char *alg_name) { struct ipcomp_tfms *pos; - struct crypto_comp **tfms; + struct crypto_comp * __percpu *tfms; int cpu; /* This can be any valid CPU ID so we don't need locking. */ diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c index eb870fcc29cc..cfceb6616ec1 100644 --- a/net/xfrm/xfrm_policy.c +++ b/net/xfrm/xfrm_policy.c @@ -2428,19 +2428,19 @@ static int __net_init xfrm_statistics_init(struct net *net) { int rv; - if (snmp_mib_init((void **)net->mib.xfrm_statistics, + if (snmp_mib_init((void __percpu **)net->mib.xfrm_statistics, sizeof(struct linux_xfrm_mib)) < 0) return -ENOMEM; rv = xfrm_proc_init(net); if (rv < 0) - snmp_mib_free((void **)net->mib.xfrm_statistics); + snmp_mib_free((void __percpu **)net->mib.xfrm_statistics); return rv; } static void xfrm_statistics_fini(struct net *net) { xfrm_proc_fini(net); - snmp_mib_free((void **)net->mib.xfrm_statistics); + snmp_mib_free((void __percpu **)net->mib.xfrm_statistics); } #else static int __net_init xfrm_statistics_init(struct net *net) diff --git a/net/xfrm/xfrm_proc.c b/net/xfrm/xfrm_proc.c index c083a4e4e796..003f2c437ac3 100644 --- a/net/xfrm/xfrm_proc.c +++ b/net/xfrm/xfrm_proc.c @@ -50,7 +50,8 @@ static int xfrm_statistics_seq_show(struct seq_file *seq, void *v) int i; for (i=0; xfrm_mib_list[i].name; i++) seq_printf(seq, "%-24s\t%lu\n", xfrm_mib_list[i].name, - snmp_fold_field((void **)net->mib.xfrm_statistics, + snmp_fold_field((void __percpu **) + net->mib.xfrm_statistics, xfrm_mib_list[i].entry)); return 0; } -- cgit v1.2.3-59-g8ed1b