On Sun, Nov 13 2022 at 11:33, Thomas Gleixner wrote:
> --- a/include/clocksource/hyperv_timer.h
> +++ b/include/clocksource/hyperv_timer.h
> @@ -15,7 +15,7 @@
>
> #include <linux/clocksource.h>
> #include <linux/math64.h>
> -#include <asm/mshyperv.h>
> +#include <asm/hyperv-tlfs.h>
Bah, that obviously wants to include the new header...
---
Subject: clocksource/drivers/hyper-v: Include asm/hyperv-tlfs.h not asm/mshyperv.h
From: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Date: Sat, 12 Nov 2022 19:08:15 +0100
clocksource/hyperv_timer.h is included into the VDSO build. It includes
asm/mshyperv.h which in turn includes the world and some more. This worked
so far by chance, but any subtle change in the include chain results in a
build breakage because VDSO builds are building user space libraries.
Include asm/hyperv-tlfs.h instead which contains everything what the VDSO
build needs and move the hv_get_raw_timer() define into the header file.
Fixup drivers/hv/vmbus_drv.c which relies on the indirect include of
asm/mshyperv.h.
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
---
arch/x86/include/asm/hyperv_timer.h | 9 +++++++++
arch/x86/include/asm/mshyperv.h | 2 --
drivers/hv/vmbus_drv.c | 1 +
include/clocksource/hyperv_timer.h | 3 ++-
4 files changed, 12 insertions(+), 3 deletions(-)
--- /dev/null
+++ b/arch/x86/include/asm/hyperv_timer.h
@@ -0,0 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_X86_HYPERV_TIMER_H
+#define _ASM_X86_HYPERV_TIMER_H
+
+#include <asm/msr.h>
+
+#define hv_get_raw_timer() rdtsc_ordered()
+
+#endif
--- a/arch/x86/include/asm/mshyperv.h
+++ b/arch/x86/include/asm/mshyperv.h
@@ -19,8 +19,6 @@ typedef int (*hyperv_fill_flush_list_fun
struct hv_guest_mapping_flush_list *flush,
void *data);
-#define hv_get_raw_timer() rdtsc_ordered()
-
void hyperv_vector_handler(struct pt_regs *regs);
#if IS_ENABLED(CONFIG_HYPERV)
--- a/drivers/hv/vmbus_drv.c
+++ b/drivers/hv/vmbus_drv.c
@@ -37,6 +37,7 @@
#include <linux/dma-map-ops.h>
#include <linux/pci.h>
#include <clocksource/hyperv_timer.h>
+#include <asm/mshyperv.h>
#include "hyperv_vmbus.h"
struct vmbus_dynid {
--- a/include/clocksource/hyperv_timer.h
+++ b/include/clocksource/hyperv_timer.h
@@ -15,7 +15,8 @@
#include <linux/clocksource.h>
#include <linux/math64.h>
-#include <asm/mshyperv.h>
+#include <asm/hyperv_timer.h>
+#include <asm/hyperv-tlfs.h>
#define HV_MAX_MAX_DELTA_TICKS 0xffffffff
#define HV_MIN_DELTA_TICKS 1
