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From d032dae613dc006c91ad8581f203af1bd4bdbf9c Mon Sep 17 00:00:00 2001
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From: Thomas Huth <thuth@redhat.com>
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Date: Mon, 14 Oct 2019 10:06:36 +0100
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Subject: [PATCH 11/21] s390-bios: ptr2u32 and u32toptr
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RH-Author: Thomas Huth <thuth@redhat.com>
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Message-id: <20191014100645.22862-9-thuth@redhat.com>
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Patchwork-id: 91788
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O-Subject: [RHEL-8.2.0 qemu-kvm PATCH v2 08/17] s390-bios: ptr2u32 and u32toptr
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Bugzilla: 1664376
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RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
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RH-Acked-by: David Hildenbrand <david@redhat.com>
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RH-Acked-by: Jens Freimann <jfreimann@redhat.com>
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From: "Jason J. Herne" <jjherne@linux.ibm.com>
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Introduce inline functions to convert between pointers and unsigned 32-bit
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ints. These are used to hide the ugliness required to avoid compiler
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warnings.
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Signed-off-by: Jason J. Herne <jjherne@linux.ibm.com>
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Acked-by: Cornelia Huck <cohuck@redhat.com>
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Reviewed-by: Thomas Huth <thuth@redhat.com>
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Message-Id: <1554388475-18329-8-git-send-email-jjherne@linux.ibm.com>
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Signed-off-by: Thomas Huth <thuth@redhat.com>
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(cherry picked from commit 1fb3e5cde8dcd9b5917aea9a0b2918e16be8be1e)
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Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
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---
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pc-bios/s390-ccw/helper.h | 31 +++++++++++++++++++++++++++++++
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1 file changed, 31 insertions(+)
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create mode 100644 pc-bios/s390-ccw/helper.h
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diff --git a/pc-bios/s390-ccw/helper.h b/pc-bios/s390-ccw/helper.h
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new file mode 100644
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index 0000000..78d5bc7
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--- /dev/null
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+++ b/pc-bios/s390-ccw/helper.h
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@@ -0,0 +1,31 @@
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+/*
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+ * Helper Functions
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+ *
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+ * Copyright (c) 2019 IBM Corp.
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+ *
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+ * Author(s): Jason J. Herne <jjherne@us.ibm.com>
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+ *
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+ * This work is licensed under the terms of the GNU GPL, version 2 or (at
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+ * your option) any later version. See the COPYING file in the top-level
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+ * directory.
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+ */
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+
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+#ifndef S390_CCW_HELPER_H
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+#define S390_CCW_HELPER_H
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+
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+#include "s390-ccw.h"
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+
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+/* Avoids compiler warnings when casting a pointer to a u32 */
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+static inline uint32_t ptr2u32(void *ptr)
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+{
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+ IPL_assert((uint64_t)ptr <= 0xffffffff, "ptr2u32: ptr too large");
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+ return (uint32_t)(uint64_t)ptr;
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+}
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+
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+/* Avoids compiler warnings when casting a u32 to a pointer */
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+static inline void *u32toptr(uint32_t n)
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+{
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+ return (void *)(uint64_t)n;
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+}
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+
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+#endif
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--
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1.8.3.1
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