diff options
Diffstat (limited to 'kernel/trace/trace.h')
| -rw-r--r-- | kernel/trace/trace.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index e1edc2197fc8..ba7ababb8308 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -77,6 +77,16 @@ enum trace_type { #undef __array #define __array(type, item, size) type item[size]; +/* + * For backward compatibility, older user space expects to see the + * kernel_stack event with a fixed size caller field. But today the fix + * size is ignored by the kernel, and the real structure is dynamic. + * Expose to user space: "unsigned long caller[8];" but the real structure + * will be "unsigned long caller[] __counted_by(size)" + */ +#undef __stack_array +#define __stack_array(type, item, size, field) type item[] __counted_by(field); + #undef __array_desc #define __array_desc(type, container, item, size) |