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x86: change _node_to_cpumask_ptr to return const ptr

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* Strengthen the return type for the _node_to_cpumask_ptr to be
    a const pointer.  This adds compiler checking to insure that
    node_to_cpumask_map[] is not changed inadvertently.

Signed-off-by: Mike Travis <[email protected]>
Cc: "[email protected]" <[email protected]>
Cc: Yinghai Lu <[email protected]>
Acked-by: Vegard Nossum <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
This commit is contained in:
Mike Travis 2008-07-08 14:35:21 -07:00 • committed by Ingo Molnar
commit 11369f356b
3 changed files with 11 additions and 10 deletions
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10
include/asm-x86/topology.h
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@ -82,7 +82,7 @@ DECLARE_EARLY_PER_CPU(int, x86_cpu_to_node_map);
#ifdef CONFIG_DEBUG_PER_CPU_MAPS
extern int cpu_to_node(int cpu);
extern int early_cpu_to_node(int cpu);
extern cpumask_t *_node_to_cpumask_ptr(int node);
extern const cpumask_t *_node_to_cpumask_ptr(int node);
extern cpumask_t node_to_cpumask(int node);
#else /* !CONFIG_DEBUG_PER_CPU_MAPS */
@ -103,7 +103,7 @@ static inline int early_cpu_to_node(int cpu)
}
/* Returns a pointer to the cpumask of CPUs on Node 'node'. */
static inline cpumask_t *_node_to_cpumask_ptr(int node)
static inline const cpumask_t *_node_to_cpumask_ptr(int node)
{
return &node_to_cpumask_map[node];
}
@ -118,7 +118,7 @@ static inline cpumask_t node_to_cpumask(int node)
/* Replace default node_to_cpumask_ptr with optimized version */
#define node_to_cpumask_ptr(v, node) \
cpumask_t *v = _node_to_cpumask_ptr(node)
const cpumask_t *v = _node_to_cpumask_ptr(node)
#define node_to_cpumask_ptr_next(v, node) \
v = _node_to_cpumask_ptr(node)
@ -186,7 +186,7 @@ extern int __node_distance(int, int);
#define cpu_to_node(cpu) 0
#define early_cpu_to_node(cpu) 0
static inline cpumask_t *_node_to_cpumask_ptr(int node)
static inline const cpumask_t *_node_to_cpumask_ptr(int node)
{
return &cpu_online_map;
}
@ -201,7 +201,7 @@ static inline int node_to_first_cpu(int node)
/* Replace default node_to_cpumask_ptr with optimized version */
#define node_to_cpumask_ptr(v, node) \
cpumask_t *v = _node_to_cpumask_ptr(node)
const cpumask_t *v = _node_to_cpumask_ptr(node)
#define node_to_cpumask_ptr_next(v, node) \
v = _node_to_cpumask_ptr(node)