| #ifndef __BACKPORT_LINUX_ERR_H |
| #define __BACKPORT_LINUX_ERR_H |
| #include_next <linux/err.h> |
| #include <linux/version.h> |
| |
| #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,39) |
| #define PTR_RET LINUX_BACKPORT(PTR_RET) |
| static inline int __must_check PTR_RET(const void *ptr) |
| { |
| if (IS_ERR(ptr)) |
| return PTR_ERR(ptr); |
| else |
| return 0; |
| } |
| #endif |
| |
| #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,33) |
| /* mask IS_ERR_OR_NULL as debian squeeze also backports this */ |
| #define IS_ERR_OR_NULL LINUX_BACKPORT(IS_ERR_OR_NULL) |
| |
| static inline long __must_check IS_ERR_OR_NULL(const void *ptr) |
| { |
| return !ptr || IS_ERR_VALUE((unsigned long)ptr); |
| } |
| #endif |
| |
| #if LINUX_VERSION_CODE < KERNEL_VERSION(3,12,0) |
| #define PTR_ERR_OR_ZERO(p) PTR_RET(p) |
| #endif |
| |
| #endif /* __BACKPORT_LINUX_ERR_H */ |
