diff mbox series

[1/8] lib/zlib: Adjust offset calculation for dfltcc_state

Message ID 20230126131428.1222214-2-zaslonko@linux.ibm.com
State New
Headers
Series lib/zlib: Set of s390 DFLTCC related patches for kernel zlib |

Commit Message

Zaslonko Mikhail Jan. 26, 2023, 1:14 p.m. UTC 
  This commit is based on:
  https://github.com/zlib-ng/zlib-ng/commit/d8b67f5

Signed-off-by: Mikhail Zaslonko <zaslonko@linux.ibm.com>
Acked-by: Ilya Leoshkevich <iii@linux.ibm.com>
---
 lib/zlib_dfltcc/dfltcc.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/lib/zlib_dfltcc/dfltcc.h b/lib/zlib_dfltcc/dfltcc.h
index 2a2fac1d050a..1f63094366e9 100644
--- a/lib/zlib_dfltcc/dfltcc.h
+++ b/lib/zlib_dfltcc/dfltcc.h
@@ -100,8 +100,9 @@  struct dfltcc_state {
     char msg[64];                      /* Buffer for strm->msg */
 };
 
+#define ALIGN_UP(p, size) (__typeof__(p))(((uintptr_t)(p) + ((size) - 1)) & ~((size) - 1))
 /* Resides right after inflate_state or deflate_state */
-#define GET_DFLTCC_STATE(state) ((struct dfltcc_state *)((state) + 1))
+#define GET_DFLTCC_STATE(state) ((struct dfltcc_state *)((char *)(state) + ALIGN_UP(sizeof(*state), 8)))
 
 /* External functions */
 int dfltcc_can_deflate(z_streamp strm);