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linux include: add ERR_CAST

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add missing ERR_CAST to linux/err.h as it is needed for ubi/ubifs support

Signed-off-by: Heiko Schocher <hs@denx.de>
This commit is contained in:
Heiko Schocher 2014-06-24 10:10:02 +02:00 • committed by Tom Rini
parent c068d44aac
commit cc96c9a79c
1 changed files with 13 additions and 4 deletions
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17
include/linux/err.h
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@ -1,12 +1,8 @@
#ifndef _LINUX_ERR_H
#define _LINUX_ERR_H
/* XXX U-BOOT XXX */
#if 0
#include <linux/compiler.h>
#else
#include <linux/compat.h>
#endif
#include <asm/errno.h>
@ -40,6 +36,19 @@ static inline long IS_ERR(const void *ptr)
return IS_ERR_VALUE((unsigned long)ptr);
}
/**
* ERR_CAST - Explicitly cast an error-valued pointer to another pointer type
* @ptr: The pointer to cast.
*
* Explicitly cast an error-valued pointer to another pointer type in such a
* way as to make it clear that's what's going on.
*/
static inline void * __must_check ERR_CAST(__force const void *ptr)
{
/* cast away the const */
return (void *) ptr;
}
#endif
#endif /* _LINUX_ERR_H */