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[8/8] pc-bios: s390x: Make u32 ptr check explicit

Message ID 20200324150847.10476-9-frankja@linux.ibm.com
State New
Headers show
Series pc-bios: s390x: Cleanup part 1 | expand

Commit Message

Janosch Frank March 24, 2020, 3:08 p.m. UTC
Let's make it a bit more clear that we check the full 64 bits to fit
into the 32 we return.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Suggested-by: David Hildenbrand <david@redhat.com>
---
 pc-bios/s390-ccw/helper.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

David Hildenbrand April 30, 2020, 3:37 p.m. UTC | #1
On 24.03.20 16:08, Janosch Frank wrote:
> Let's make it a bit more clear that we check the full 64 bits to fit
> into the 32 we return.
> 
> Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
> Suggested-by: David Hildenbrand <david@redhat.com>
> ---
>  pc-bios/s390-ccw/helper.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/pc-bios/s390-ccw/helper.h b/pc-bios/s390-ccw/helper.h
> index 78d5bc74421b4173..b4e83a7e5deaa9dc 100644
> --- a/pc-bios/s390-ccw/helper.h
> +++ b/pc-bios/s390-ccw/helper.h
> @@ -18,7 +18,7 @@
>  /* Avoids compiler warnings when casting a pointer to a u32 */
>  static inline uint32_t ptr2u32(void *ptr)
>  {
> -    IPL_assert((uint64_t)ptr <= 0xffffffff, "ptr2u32: ptr too large");
> +    IPL_assert((uint64_t)ptr <= 0xfffffffful, "ptr2u32: ptr too large");

wonder if we should even do ull.

Reviewed-by: David Hildenbrand <david@redhat.com>

>      return (uint32_t)(uint64_t)ptr;
>  }
>  
>
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Patch

diff --git a/pc-bios/s390-ccw/helper.h b/pc-bios/s390-ccw/helper.h
index 78d5bc74421b4173..b4e83a7e5deaa9dc 100644
--- a/pc-bios/s390-ccw/helper.h
+++ b/pc-bios/s390-ccw/helper.h
@@ -18,7 +18,7 @@ 
 /* Avoids compiler warnings when casting a pointer to a u32 */
 static inline uint32_t ptr2u32(void *ptr)
 {
-    IPL_assert((uint64_t)ptr <= 0xffffffff, "ptr2u32: ptr too large");
+    IPL_assert((uint64_t)ptr <= 0xfffffffful, "ptr2u32: ptr too large");
     return (uint32_t)(uint64_t)ptr;
 }