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| author | Rusty Russell <rusty@rustcorp.com.au> | 2009-10-29 22:34:15 +0900 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2009-10-29 22:34:15 +0900 |
| commit | e0fdb0e050eae331046385643618f12452aa7e73 (patch) | |
| tree | 6156f577879764fd75cf8c46ca7980433de0e59d /include/linux/percpu.h | |
| parent | f7b64fe806029e0a0454df132eec3c5ab576102c (diff) | |
| download | linux-e0fdb0e050eae331046385643618f12452aa7e73.tar.gz linux-e0fdb0e050eae331046385643618f12452aa7e73.tar.bz2 linux-e0fdb0e050eae331046385643618f12452aa7e73.zip | |
percpu: add __percpu for sparse.
We have to make __kernel "__attribute__((address_space(0)))" so we can
cast to it.
tj: * put_cpu_var() update.
* Annotations added to dynamic allocator interface.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'include/linux/percpu.h')
| -rw-r--r-- | include/linux/percpu.h | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/include/linux/percpu.h b/include/linux/percpu.h index f965f833a643..2c0d31a3f6b6 100644 --- a/include/linux/percpu.h +++ b/include/linux/percpu.h @@ -30,8 +30,12 @@ preempt_disable(); \ &__get_cpu_var(var); })) +/* + * The weird & is necessary because sparse considers (void)(var) to be + * a direct dereference of percpu variable (var). + */ #define put_cpu_var(var) do { \ - (void)(var); \ + (void)&(var); \ preempt_enable(); \ } while (0) @@ -130,9 +134,9 @@ extern int __init pcpu_page_first_chunk(size_t reserved_size, */ #define per_cpu_ptr(ptr, cpu) SHIFT_PERCPU_PTR((ptr), per_cpu_offset((cpu))) -extern void *__alloc_reserved_percpu(size_t size, size_t align); -extern void *__alloc_percpu(size_t size, size_t align); -extern void free_percpu(void *__pdata); +extern void __percpu *__alloc_reserved_percpu(size_t size, size_t align); +extern void __percpu *__alloc_percpu(size_t size, size_t align); +extern void free_percpu(void __percpu *__pdata); #ifndef CONFIG_HAVE_SETUP_PER_CPU_AREA extern void __init setup_per_cpu_areas(void); @@ -142,7 +146,7 @@ extern void __init setup_per_cpu_areas(void); #define per_cpu_ptr(ptr, cpu) ({ (void)(cpu); (ptr); }) -static inline void *__alloc_percpu(size_t size, size_t align) +static inline void __percpu *__alloc_percpu(size_t size, size_t align) { /* * Can't easily make larger alignment work with kmalloc. WARN @@ -153,7 +157,7 @@ static inline void *__alloc_percpu(size_t size, size_t align) return kzalloc(size, GFP_KERNEL); } -static inline void free_percpu(void *p) +static inline void free_percpu(void __percpu *p) { kfree(p); } @@ -168,7 +172,7 @@ static inline void *pcpu_lpage_remapped(void *kaddr) #endif /* CONFIG_SMP */ #define alloc_percpu(type) \ - (typeof(type) *)__alloc_percpu(sizeof(type), __alignof__(type)) + (typeof(type) __percpu *)__alloc_percpu(sizeof(type), __alignof__(type)) /* * Optional methods for optimized non-lvalue per-cpu variable access. |