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 <tj@kernel.org>
Acked-by: David S. Miller <davem@davemloft.net>
Cc: Patrick McHardy <kaber@trash.net>
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Cc: Vlad Yasevich <vladislav.yasevich@hp.com>
Cc: netdev@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tejun Heo
2010-02-16 15:20:26 +00:00
committed by David S. Miller
parent 2bb4646fce
commit 7d720c3e4f
22 changed files with 127 additions and 114 deletions

View File

@ -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. */