diff options
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/compiler_types.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/include/linux/compiler_types.h b/include/linux/compiler_types.h index d7858901f035..dea5bf5bd09c 100644 --- a/include/linux/compiler_types.h +++ b/include/linux/compiler_types.h @@ -239,6 +239,16 @@ struct ftrace_likely_data { #define noinstr __noinstr_section(".noinstr.text") +/* + * The __cpuidle section is used twofold: + * + * 1) the original use -- identifying if a CPU is 'stuck' in idle state based + * on it's instruction pointer. See cpu_in_idle(). + * + * 2) supressing instrumentation around where cpuidle disables RCU; where the + * function isn't strictly required for #1, this is interchangeable with + * noinstr. + */ #define __cpuidle __noinstr_section(".cpuidle.text") #endif /* __KERNEL__ */ |