Adding part of the kernel's <linux/err.h> interface: inline void * __must_check ERR_PTR(long error); inline long __must_check PTR_ERR(__force const void *ptr); inline bool __must_check IS_ERR(__force const void *ptr);
it will be used to propagate error through pointers in following patches. Link: http://lkml.kernel.org/n/[email protected] Signed-off-by: Jiri Olsa <[email protected]> --- tools/include/linux/err.h | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) create mode 100644 tools/include/linux/err.h diff --git a/tools/include/linux/err.h b/tools/include/linux/err.h new file mode 100644 index 000000000000..2df92df55cfe --- /dev/null +++ b/tools/include/linux/err.h @@ -0,0 +1,28 @@ +#ifndef __TOOLS_LINUX_ERR_H +#define __TOOLS_LINUX_ERR_H + +#include <linux/compiler.h> +#include <linux/types.h> + +#include <asm/errno.h> + +#define MAX_ERRNO 4095 + +#define IS_ERR_VALUE(x) unlikely((x) >= (unsigned long)-MAX_ERRNO) + +static inline void * __must_check ERR_PTR(long error) +{ + return (void *) error; +} + +static inline long __must_check PTR_ERR(__force const void *ptr) +{ + return (long) ptr; +} + +static inline bool __must_check IS_ERR(__force const void *ptr) +{ + return IS_ERR_VALUE((unsigned long)ptr); +} + +#endif /* _LINUX_ERR_H */ -- 2.4.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
