diff options
Diffstat (limited to 'include/linux/linkage.h')
| -rw-r--r-- | include/linux/linkage.h | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/include/linux/linkage.h b/include/linux/linkage.h index 0592936344c..2119610b24f 100644 --- a/include/linux/linkage.h +++ b/include/linux/linkage.h @@ -17,8 +17,24 @@ # define asmregparm #endif -#ifndef prevent_tail_call -# define prevent_tail_call(ret) do { } while (0) +/* + * 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). + */ +/* Assembly files may be compiled with -traditional .. */ +#ifndef __ASSEMBLY__ +#ifndef asmlinkage_protect +# define asmlinkage_protect(n, ret, args...) do { } while (0) +#endif #endif #ifndef __ALIGN |