diff options
Diffstat (limited to 'include/linux/percpu.h')
| -rw-r--r-- | include/linux/percpu.h | 38 |
1 files changed, 14 insertions, 24 deletions
diff --git a/include/linux/percpu.h b/include/linux/percpu.h index b8b9084527b..5095b834a6f 100644 --- a/include/linux/percpu.h +++ b/include/linux/percpu.h @@ -39,10 +39,17 @@ preempt_enable(); \ } while (0) -#ifdef CONFIG_SMP +#define get_cpu_ptr(var) ({ \ + preempt_disable(); \ + this_cpu_ptr(var); }) + +#define put_cpu_ptr(var) do { \ + (void)(var); \ + preempt_enable(); \ +} while (0) /* minimum unit size, also is the maximum supported allocation size */ -#define PCPU_MIN_UNIT_SIZE PFN_ALIGN(64 << 10) +#define PCPU_MIN_UNIT_SIZE PFN_ALIGN(32 << 10) /* * Percpu allocator can serve percpu allocations before slab is @@ -137,37 +144,20 @@ extern int __init pcpu_page_first_chunk(size_t reserved_size, * dynamically allocated. Non-atomic access to the current CPU's * version should probably be combined with get_cpu()/put_cpu(). */ +#ifdef CONFIG_SMP #define per_cpu_ptr(ptr, cpu) SHIFT_PERCPU_PTR((ptr), per_cpu_offset((cpu))) +#else +#define per_cpu_ptr(ptr, cpu) ({ (void)(cpu); VERIFY_PERCPU_PTR((ptr)); }) +#endif extern void __percpu *__alloc_reserved_percpu(size_t size, size_t align); extern bool is_kernel_percpu_address(unsigned long addr); -#ifndef CONFIG_HAVE_SETUP_PER_CPU_AREA +#if !defined(CONFIG_SMP) || !defined(CONFIG_HAVE_SETUP_PER_CPU_AREA) extern void __init setup_per_cpu_areas(void); #endif extern void __init percpu_init_late(void); -#else /* CONFIG_SMP */ - -#define per_cpu_ptr(ptr, cpu) ({ (void)(cpu); (ptr); }) - -/* can't distinguish from other static vars, always false */ -static inline bool is_kernel_percpu_address(unsigned long addr) -{ - return false; -} - -static inline void __init setup_per_cpu_areas(void) { } - -static inline void __init percpu_init_late(void) { } - -static inline void *pcpu_lpage_remapped(void *kaddr) -{ - return NULL; -} - -#endif /* CONFIG_SMP */ - extern void __percpu *__alloc_percpu(size_t size, size_t align); extern void free_percpu(void __percpu *__pdata); extern phys_addr_t per_cpu_ptr_to_phys(void *addr); |