diff options
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/linkage.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/include/linux/linkage.h b/include/linux/linkage.h index fe2a39c489b..b163c5c40db 100644 --- a/include/linux/linkage.h +++ b/include/linux/linkage.h @@ -17,6 +17,19 @@ # define asmregparm #endif +/* + * This is used by architectures to keep arguments on the stack + * untouched by the compiler by keeping them live until the end. + * The argument stack may be owned by the assembly-language + * caller, not the callee, and gcc doesn't always understand + * that. + * + * We have the return value, and a maximum of six arguments. + * + * This should always be followed by a "return ret" for the + * protection to work (ie no more work that the compiler might + * end up needing stack temporaries for). + */ #ifndef asmlinkage_protect # define asmlinkage_protect(n, ret, args...) do { } while (0) #endif |