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zdump: refractor PTR_DIFF

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PTR_SUB already implements subtraction of pointers. Let's reuse it.

Suggested-by: Alexander Egorenkov <egorenar@linux.ibm.com>
Reviewed-by: Alexander Egorenkov <egorenar@linux.ibm.com>
Signed-off-by: Steffen Eiden <seiden@linux.ibm.com>
Signed-off-by: Marc Hartmayer <mhartmay@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
This commit is contained in:
Steffen Eiden
2021-11-03 13:26:25 +00:00
committed by Jan Höppner
parent ae305b5158
commit 5b0115fdb4
1 changed files with 1 additions and 1 deletions
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zdump/zg.h
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@@ -142,7 +142,7 @@ static inline u32 zg_csum_partial(const void *buf, int len, u32 sum)
*/
#define PTR_SUB(x, y) (((char *) (x)) - ((unsigned long) (y)))
#define PTR_ADD(x, y) (((char *) (x)) + ((unsigned long) (y)))
#define PTR_DIFF(x, y) ((unsigned long)(((char *) (x)) - ((unsigned long) (y))))
#define PTR_DIFF(x, y) ((unsigned long)PTR_SUB(x, y))
/*
* File functions