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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

Tejun Heo
2010-02-17 15:05:38 +0800

core.h 246 Bytes

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#ifndef __NETNS_CORE_H__
#define __NETNS_CORE_H__

struct ctl_table_header;
struct prot_inuse;

struct netns_core {
	/* core sysctls */
	struct ctl_table_header	*sysctl_hdr;

	int	sysctl_somaxconn;

	struct prot_inuse __percpu *inuse;
};

#endif