| 20,12 → 20,14 |
|---|
| # define __pmem __attribute__((noderef, address_space(5))) |
| #ifdef CONFIG_SPARSE_RCU_POINTER |
| # define __rcu __attribute__((noderef, address_space(4))) |
| #else |
| #else /* CONFIG_SPARSE_RCU_POINTER */ |
| # define __rcu |
| #endif |
| #endif /* CONFIG_SPARSE_RCU_POINTER */ |
| # define __private __attribute__((noderef)) |
| extern void __chk_user_ptr(const volatile void __user *); |
| extern void __chk_io_ptr(const volatile void __iomem *); |
| #else |
| # define ACCESS_PRIVATE(p, member) (*((typeof((p)->member) __force *) &(p)->member)) |
| #else /* __CHECKER__ */ |
| # define __user |
| # define __kernel |
| # define __safe |
| 44,7 → 46,9 |
|---|
| # define __percpu |
| # define __rcu |
| # define __pmem |
| #endif |
| # define __private |
| # define ACCESS_PRIVATE(p, member) ((p)->member) |
| #endif /* __CHECKER__ */ |
| |
| /* Indirect macros required for expanded argument pasting, eg. __LINE__. */ |
| #define ___PASTE(a,b) a##b |
| 263,8 → 267,9 |
|---|
| * In contrast to ACCESS_ONCE these two macros will also work on aggregate |
| * data types like structs or unions. If the size of the accessed data |
| * type exceeds the word size of the machine (e.g., 32 bits or 64 bits) |
| * READ_ONCE() and WRITE_ONCE() will fall back to memcpy and print a |
| * compile-time warning. |
| * READ_ONCE() and WRITE_ONCE() will fall back to memcpy(). There's at |
| * least two memcpy()s: one for the __builtin_memcpy() and then one for |
| * the macro doing the copy of variable - '__u' allocated on the stack. |
| * |
| * Their two major use cases are: (1) Mediating communication between |
| * process-level code and irq/NMI handlers, all running on the same CPU, |