From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- include/linux/err.h | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) create mode 100644 include/linux/err.h (limited to 'include/linux/err.h') diff --git a/include/linux/err.h b/include/linux/err.h new file mode 100644 index 000000000000..17c55df13615 --- /dev/null +++ b/include/linux/err.h @@ -0,0 +1,31 @@ +#ifndef _LINUX_ERR_H +#define _LINUX_ERR_H + +#include + +#include + +/* + * Kernel pointers have redundant information, so we can use a + * scheme where we can return either an error code or a dentry + * pointer with the same return value. + * + * This should be a per-architecture thing, to allow different + * error and pointer decisions. + */ +static inline void *ERR_PTR(long error) +{ + return (void *) error; +} + +static inline long PTR_ERR(const void *ptr) +{ + return (long) ptr; +} + +static inline long IS_ERR(const void *ptr) +{ + return unlikely((unsigned long)ptr > (unsigned long)-1000L); +} + +#endif /* _LINUX_ERR_H */ -- cgit v1.2.3-59-g8ed1b