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authorTejun Heo <tj@kernel.org>2009-02-20 16:29:08 +0900
committerTejun Heo <tj@kernel.org>2009-02-20 16:29:08 +0900
commitf2a8205c4ef1af917d175c36a4097ae5587791c8 (patch)
tree6c5531aa50803fda8005ea94c04b94fcd0310be3 /include/linux/percpu.h
parent313e458f81ec3852106c5a83830fe0d4f405a71a (diff)
percpu: kill percpu_alloc() and friends
Impact: kill unused functions percpu_alloc() and its friends never saw much action. It was supposed to replace the cpu-mask unaware __alloc_percpu() but it never happened and in fact __percpu_alloc_mask() itself never really grew proper up/down handling interface either (no exported interface for populate/depopulate). percpu allocation is about to go through major reimplementation and there's no reason to carry this unused interface around. Replace it with __alloc_percpu() and free_percpu(). Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'include/linux/percpu.h')
-rw-r--r--include/linux/percpu.h47
1 files changed, 22 insertions, 25 deletions
diff --git a/include/linux/percpu.h b/include/linux/percpu.h
index 1fdaee93c04..d99e24ae181 100644
--- a/include/linux/percpu.h
+++ b/include/linux/percpu.h
@@ -82,46 +82,43 @@ struct percpu_data {
#define __percpu_disguise(pdata) (struct percpu_data *)~(unsigned long)(pdata)
-extern void *__percpu_alloc_mask(size_t size, gfp_t gfp, cpumask_t *mask);
-extern void percpu_free(void *__pdata);
+/*
+ * Use this to get to a cpu's version of the per-cpu object
+ * dynamically allocated. Non-atomic access to the current CPU's
+ * version should probably be combined with get_cpu()/put_cpu().
+ */
+#define per_cpu_ptr(ptr, cpu) \
+({ \
+ struct percpu_data *__p = __percpu_disguise(ptr); \
+ (__typeof__(ptr))__p->ptrs[(cpu)]; \
+})
+
+extern void *__alloc_percpu(size_t size, size_t align);
+extern void free_percpu(void *__pdata);
#else /* CONFIG_SMP */
#define per_cpu_ptr(ptr, cpu) ({ (void)(cpu); (ptr); })
-static __always_inline void *__percpu_alloc_mask(size_t size, gfp_t gfp, cpumask_t *mask)
+static inline void *__alloc_percpu(size_t size, size_t align)
{
+ /*
+ * Can't easily make larger alignment work with kmalloc. WARN
+ * on it. Larger alignment should only be used for module
+ * percpu sections on SMP for which this path isn't used.
+ */
+ WARN_ON_ONCE(align > __alignof__(unsigned long long));
return kzalloc(size, gfp);
}
-static inline void percpu_free(void *__pdata)
+static inline void free_percpu(void *p)
{
- kfree(__pdata);
+ kfree(p);
}
#endif /* CONFIG_SMP */
-#define percpu_alloc_mask(size, gfp, mask) \
- __percpu_alloc_mask((size), (gfp), &(mask))
-
-#define percpu_alloc(size, gfp) percpu_alloc_mask((size), (gfp), cpu_online_map)
-
-/* (legacy) interface for use without CPU hotplug handling */
-
-#define __alloc_percpu(size, align) percpu_alloc_mask((size), GFP_KERNEL, \
- cpu_possible_map)
#define alloc_percpu(type) (type *)__alloc_percpu(sizeof(type), \
__alignof__(type))
-#define free_percpu(ptr) percpu_free((ptr))
-/*
- * Use this to get to a cpu's version of the per-cpu object dynamically
- * allocated. Non-atomic access to the current CPU's version should
- * probably be combined with get_cpu()/put_cpu().
- */
-#define per_cpu_ptr(ptr, cpu) \
-({ \
- struct percpu_data *__p = __percpu_disguise(ptr); \
- (__typeof__(ptr))__p->ptrs[(cpu)]; \
-})
#endif /* __LINUX_PERCPU_H */