[PATCH] eal: fix pointer add/sub macros for large offsets values
flat view
COLD27d
From: Bruce Richardson <hidden>
Date: 2026-09-11 16:40:38
Subsystem:
library code, the rest · Maintainers:
Andrew Morton, Linus Torvalds
The macros for adding or subtracting from pointers cast the pointer type
to uintptr_t before doing the arithmetic. However, for 32-bit builds, if
the value being added or subtracted is larger than uintptr_t, then we
get errors when casting back to "void *" type. We fix this by casting
the result to uintptr_t before casting to pointer.
Fixes: af75078fece3 ("first public release")
Cc: stable@dpdk.org
Signed-off-by: Bruce Richardson <redacted>
---
lib/eal/include/rte_common.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/lib/eal/include/rte_common.h b/lib/eal/include/rte_common.h
index f872d3eabb..c17f50e2fd 100644
--- a/lib/eal/include/rte_common.h
+++ b/lib/eal/include/rte_common.h@@ -572,12 +572,12 @@ static void __attribute__((destructor(RTE_PRIO(prio)), used)) func(void) /** * add a byte-value offset to a pointer */ -#define RTE_PTR_ADD(ptr, x) ((void*)((uintptr_t)(ptr) + (x))) +#define RTE_PTR_ADD(ptr, x) ((void *)(uintptr_t)((uintptr_t)(ptr) + (x))) /** * subtract a byte-value offset from a pointer */ -#define RTE_PTR_SUB(ptr, x) ((void *)((uintptr_t)(ptr) - (x))) +#define RTE_PTR_SUB(ptr, x) ((void *)(uintptr_t)((uintptr_t)(ptr) - (x))) /** * get the difference between two pointer values, i.e. how far apart
--
2.53.0