diff options
Diffstat (limited to 'include/linux/compiler.h')
| -rw-r--r-- | include/linux/compiler.h | 16 | 
1 files changed, 0 insertions, 16 deletions
diff --git a/include/linux/compiler.h b/include/linux/compiler.h index 1b45e4a0519b..0e41ca0e5927 100644 --- a/include/linux/compiler.h +++ b/include/linux/compiler.h  | |||
| @@ -192,29 +192,16 @@ void ftrace_likely_update(struct ftrace_branch_data *f, int val, int expect); | |||
| 192 | 192 | ||
| 193 | #include <uapi/linux/types.h> | 193 | #include <uapi/linux/types.h> | 
| 194 | 194 | ||
| 195 | static __always_inline void data_access_exceeds_word_size(void) | ||
| 196 | #ifdef __compiletime_warning | ||
| 197 | __compiletime_warning("data access exceeds word size and won't be atomic") | ||
| 198 | #endif | ||
| 199 | ; | ||
| 200 | |||
| 201 | static __always_inline void data_access_exceeds_word_size(void) | ||
| 202 | { | ||
| 203 | } | ||
| 204 | |||
| 205 | static __always_inline void __read_once_size(const volatile void *p, void *res, int size) | 195 | static __always_inline void __read_once_size(const volatile void *p, void *res, int size) | 
| 206 | { | 196 | { | 
| 207 | switch (size) { | 197 | switch (size) { | 
| 208 | case 1: *(__u8 *)res = *(volatile __u8 *)p; break; | 198 | case 1: *(__u8 *)res = *(volatile __u8 *)p; break; | 
| 209 | case 2: *(__u16 *)res = *(volatile __u16 *)p; break; | 199 | case 2: *(__u16 *)res = *(volatile __u16 *)p; break; | 
| 210 | case 4: *(__u32 *)res = *(volatile __u32 *)p; break; | 200 | case 4: *(__u32 *)res = *(volatile __u32 *)p; break; | 
| 211 | #ifdef CONFIG_64BIT | ||
| 212 | case 8: *(__u64 *)res = *(volatile __u64 *)p; break; | 201 | case 8: *(__u64 *)res = *(volatile __u64 *)p; break; | 
| 213 | #endif | ||
| 214 | default: | 202 | default: | 
| 215 | barrier(); | 203 | barrier(); | 
| 216 | __builtin_memcpy((void *)res, (const void *)p, size); | 204 | __builtin_memcpy((void *)res, (const void *)p, size); | 
| 217 | data_access_exceeds_word_size(); | ||
| 218 | barrier(); | 205 | barrier(); | 
| 219 | } | 206 | } | 
| 220 | } | 207 | } | 
| @@ -225,13 +212,10 @@ static __always_inline void __write_once_size(volatile void *p, void *res, int s | |||
| 225 | case 1: *(volatile __u8 *)p = *(__u8 *)res; break; | 212 | case 1: *(volatile __u8 *)p = *(__u8 *)res; break; | 
| 226 | case 2: *(volatile __u16 *)p = *(__u16 *)res; break; | 213 | case 2: *(volatile __u16 *)p = *(__u16 *)res; break; | 
| 227 | case 4: *(volatile __u32 *)p = *(__u32 *)res; break; | 214 | case 4: *(volatile __u32 *)p = *(__u32 *)res; break; | 
| 228 | #ifdef CONFIG_64BIT | ||
| 229 | case 8: *(volatile __u64 *)p = *(__u64 *)res; break; | 215 | case 8: *(volatile __u64 *)p = *(__u64 *)res; break; | 
| 230 | #endif | ||
| 231 | default: | 216 | default: | 
| 232 | barrier(); | 217 | barrier(); | 
| 233 | __builtin_memcpy((void *)p, (const void *)res, size); | 218 | __builtin_memcpy((void *)p, (const void *)res, size); | 
| 234 | data_access_exceeds_word_size(); | ||
| 235 | barrier(); | 219 | barrier(); | 
| 236 | } | 220 | } | 
| 237 | } | 221 | } | 
