x86/entry: Merge thunk_64.S and thunk_32.S into thunk.S

The code in thunk_64.S and thunk_32.S are exactly the same except for
the comments. Merge them in to thunk.S.

And since thunk_32.S was originated from thunk_64.S, the new merged
thunk.S is actually renamed from thunk_64.S.

Signed-off-by: Lai Jiangshan <jiangshan.ljs@antgroup.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20240407090558.3395-9-jiangshanlai@gmail.com

diff --git a/arch/x86/entry/Makefile b/arch/x86/entry/Makefile
index c93e7f5c2a065233a04637702d5df401553ed6cc..ce1cc1622385b3caaf346e6deb4c0cb8a3ff5e58 100644 (file)
--- a/arch/x86/entry/Makefile
+++ b/arch/x86/entry/Makefile
@@ -17,7 +17,7 @@ obj-y                         += common.o
 obj-y                          += vdso/
 obj-y                          += vsyscall/
 
-obj-$(CONFIG_PREEMPTION)       += thunk_$(BITS).o
+obj-$(CONFIG_PREEMPTION)       += thunk.o
 CFLAGS_entry_fred.o            += -fno-stack-protector
 CFLAGS_REMOVE_entry_fred.o     += -pg $(CC_FLAGS_FTRACE)
 obj-$(CONFIG_X86_FRED)         += entry_64_fred.o entry_fred.o

diff --git a/arch/x86/entry/thunk.S b/arch/x86/entry/thunk.S
new file mode 100644 (file)
index 0000000..119ebdc
--- /dev/null
+++ b/arch/x86/entry/thunk.S
@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Save registers before calling assembly functions. This avoids
+ * disturbance of register allocation in some inline assembly constructs.
+ * Copyright 2001,2002 by Andi Kleen, SuSE Labs.
+ */
+#include <linux/export.h>
+#include <linux/linkage.h>
+#include "calling.h"
+#include <asm/asm.h>
+
+THUNK preempt_schedule_thunk, preempt_schedule
+THUNK preempt_schedule_notrace_thunk, preempt_schedule_notrace
+EXPORT_SYMBOL(preempt_schedule_thunk)
+EXPORT_SYMBOL(preempt_schedule_notrace_thunk)

diff --git a/arch/x86/entry/thunk_32.S b/arch/x86/entry/thunk_32.S
deleted file mode 100644 (file)
index da37f42..0000000
--- a/arch/x86/entry/thunk_32.S
+++ /dev/null
@@ -1,18 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Trampoline to trace irqs off. (otherwise CALLER_ADDR1 might crash)
- * Copyright 2008 by Steven Rostedt, Red Hat, Inc
- *  (inspired by Andi Kleen's thunk_64.S)
- */
-
-#include <linux/export.h>
-#include <linux/linkage.h>
-#include <asm/asm.h>
-
-#include "calling.h"
-
-THUNK preempt_schedule_thunk, preempt_schedule
-THUNK preempt_schedule_notrace_thunk, preempt_schedule_notrace
-EXPORT_SYMBOL(preempt_schedule_thunk)
-EXPORT_SYMBOL(preempt_schedule_notrace_thunk)
-

diff --git a/arch/x86/entry/thunk_64.S b/arch/x86/entry/thunk_64.S
deleted file mode 100644 (file)
index 119ebdc..0000000
--- a/arch/x86/entry/thunk_64.S
+++ /dev/null
@@ -1,15 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Save registers before calling assembly functions. This avoids
- * disturbance of register allocation in some inline assembly constructs.
- * Copyright 2001,2002 by Andi Kleen, SuSE Labs.
- */
-#include <linux/export.h>
-#include <linux/linkage.h>
-#include "calling.h"
-#include <asm/asm.h>
-
-THUNK preempt_schedule_thunk, preempt_schedule
-THUNK preempt_schedule_notrace_thunk, preempt_schedule_notrace
-EXPORT_SYMBOL(preempt_schedule_thunk)
-EXPORT_SYMBOL(preempt_schedule_notrace_thunk)