From 8c59ca93b839261863f0db2295a2b6b4dd4f175e Mon Sep 17 00:00:00 2001 From: Simon Goldschmidt Date: Tue, 22 Oct 2019 21:29:47 +0200 Subject: [PATCH] linux err: make ERR_PTR/PTR_ERR architecture specific This patch changes ERR_PTR/PTR_ERR to use CONFIG_ERR_PTR_OFFSET to map errno values into a pointer region that cannot contain valid pointers. IS_ERR and IS_ERR_OR_NULL have to be converted to use PTR_ERR, too, for this to work. Signed-off-by: Simon Goldschmidt --- include/linux/err.h | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/include/linux/err.h b/include/linux/err.h index 22e5756edd..5ede82432d 100644 --- a/include/linux/err.h +++ b/include/linux/err.h @@ -23,22 +23,22 @@ static inline void *ERR_PTR(long error) { - return (void *) error; + return (void *)(CONFIG_ERR_PTR_OFFSET + error); } static inline long PTR_ERR(const void *ptr) { - return (long) ptr; + return ((long)ptr - CONFIG_ERR_PTR_OFFSET); } static inline long IS_ERR(const void *ptr) { - return IS_ERR_VALUE((unsigned long)ptr); + return IS_ERR_VALUE((unsigned long)PTR_ERR(ptr)); } static inline bool IS_ERR_OR_NULL(const void *ptr) { - return !ptr || IS_ERR_VALUE((unsigned long)ptr); + return !ptr || IS_ERR_VALUE((unsigned long)PTR_ERR(ptr)); } /** -- 2.25.1