diff options
Diffstat (limited to 'include/linux/percpu-defs.h')
| -rw-r--r-- | include/linux/percpu-defs.h | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/include/linux/percpu-defs.h b/include/linux/percpu-defs.h index 0fa0cb52425..1fa36eb54b6 100644 --- a/include/linux/percpu-defs.h +++ b/include/linux/percpu-defs.h @@ -19,6 +19,16 @@ __attribute__((section(".discard"), unused)) /* + * Macro which verifies @ptr is a percpu pointer without evaluating + * @ptr. This is to be used in percpu accessors to verify that the + * input parameter is a percpu pointer. + */ +#define __verify_pcpu_ptr(ptr) do { \ + void __percpu *__vpp_verify = (typeof(ptr))NULL; \ + (void)__vpp_verify; \ +} while (0) + +/* * s390 and alpha modules require percpu variables to be defined as * weak to force the compiler to generate GOT based external * references for them. This is necessary because percpu sections @@ -129,10 +139,16 @@ __aligned(PAGE_SIZE) /* - * Intermodule exports for per-CPU variables. + * Intermodule exports for per-CPU variables. sparse forgets about + * address space across EXPORT_SYMBOL(), change EXPORT_SYMBOL() to + * noop if __CHECKER__. */ +#ifndef __CHECKER__ #define EXPORT_PER_CPU_SYMBOL(var) EXPORT_SYMBOL(var) #define EXPORT_PER_CPU_SYMBOL_GPL(var) EXPORT_SYMBOL_GPL(var) - +#else +#define EXPORT_PER_CPU_SYMBOL(var) +#define EXPORT_PER_CPU_SYMBOL_GPL(var) +#endif #endif /* _LINUX_PERCPU_DEFS_H */ |