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linux err: make ERR_PTR/PTR_ERR architecture specific

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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 <simon.k.r.goldschmidt@gmail.com>
This commit is contained in:
Simon Goldschmidt
2019-10-22 21:29:47 +02:00
committed by Tom Rini
parent 93db2b83ed
commit 8c59ca93b8
1 changed files with 4 additions and 4 deletions
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8
include/linux/err.h
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@@ -23,22 +23,22 @@
static inline void *ERR_PTR(long error) 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) 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) 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) 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));
} }
/** /**