[tip: x86/asm] x86/asm: Do not annotate functions with GLOBAL

[tip-bot2 for Jiri Slaby]

The following commit has been merged into the x86/asm branch of tip:

Commit-ID:     37818afd15fe720571955e2f51555a9ffc84363a
Gitweb:        https://git.kernel.org/tip/37818afd15fe720571955e2f51555a9ffc84363a
Author:        Jiri Slaby <jslaby@xxxxxxx>
AuthorDate:    Fri, 11 Oct 2019 13:50:56 +02:00
Committer:     Borislav Petkov <bp@xxxxxxx>
CommitterDate: Fri, 18 Oct 2019 11:25:58 +02:00

x86/asm: Do not annotate functions with GLOBAL

GLOBAL is an x86's custom macro and is going to die very soon. It was
meant for global symbols, but here, it was used for functions. Instead,
use the new macros SYM_FUNC_START* and SYM_CODE_START* (depending on the
type of the function) which are dedicated to global functions. And since
they both require a closing by SYM_*_END, do that here too.

startup_64, which does not use GLOBAL but uses .globl explicitly, is
converted too.

"No alignments" are preserved.

Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
Signed-off-by: Borislav Petkov <bp@xxxxxxx>
Cc: Allison Randal <allison@xxxxxxxxxxx>
Cc: Andy Lutomirski <luto@xxxxxxxxxx>
Cc: Cao jin <caoj.fnst@xxxxxxxxxxxxxx>
Cc: Enrico Weigelt <info@xxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Juergen Gross <jgross@xxxxxxxx>
Cc: Kate Stewart <kstewart@xxxxxxxxxxxxxxxxxxx>
Cc: linux-arch@xxxxxxxxxxxxxxx
Cc: Maran Wilson <maran.wilson@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: x86-ml <x86@xxxxxxxxxx>
Link: https://lkml.kernel.org/r/20191011115108.12392-17-jslaby@xxxxxxx
---
 arch/x86/boot/copy.S      | 16 ++++++++--------
 arch/x86/boot/pmjump.S    |  4 ++--
 arch/x86/kernel/head_64.S |  5 +++--
 3 files changed, 13 insertions(+), 12 deletions(-)

diff --git a/arch/x86/boot/copy.S b/arch/x86/boot/copy.S
index 4c5f4f4..6afd05e 100644
--- a/arch/x86/boot/copy.S
+++ b/arch/x86/boot/copy.S
@@ -15,7 +15,7 @@
 	.code16
 	.text
 
-GLOBAL(memcpy)
+SYM_FUNC_START_NOALIGN(memcpy)
 	pushw	%si
 	pushw	%di
 	movw	%ax, %di
@@ -29,9 +29,9 @@ GLOBAL(memcpy)
 	popw	%di
 	popw	%si
 	retl
-ENDPROC(memcpy)
+SYM_FUNC_END(memcpy)
 
-GLOBAL(memset)
+SYM_FUNC_START_NOALIGN(memset)
 	pushw	%di
 	movw	%ax, %di
 	movzbl	%dl, %eax
@@ -44,22 +44,22 @@ GLOBAL(memset)
 	rep; stosb
 	popw	%di
 	retl
-ENDPROC(memset)
+SYM_FUNC_END(memset)
 
-GLOBAL(copy_from_fs)
+SYM_FUNC_START_NOALIGN(copy_from_fs)
 	pushw	%ds
 	pushw	%fs
 	popw	%ds
 	calll	memcpy
 	popw	%ds
 	retl
-ENDPROC(copy_from_fs)
+SYM_FUNC_END(copy_from_fs)
 
-GLOBAL(copy_to_fs)
+SYM_FUNC_START_NOALIGN(copy_to_fs)
 	pushw	%es
 	pushw	%fs
 	popw	%es
 	calll	memcpy
 	popw	%es
 	retl
-ENDPROC(copy_to_fs)
+SYM_FUNC_END(copy_to_fs)
diff --git a/arch/x86/boot/pmjump.S b/arch/x86/boot/pmjump.S
index 81658fe..cbec8bd 100644
--- a/arch/x86/boot/pmjump.S
+++ b/arch/x86/boot/pmjump.S
@@ -21,7 +21,7 @@
 /*
  * void protected_mode_jump(u32 entrypoint, u32 bootparams);
  */
-GLOBAL(protected_mode_jump)
+SYM_FUNC_START_NOALIGN(protected_mode_jump)
 	movl	%edx, %esi		# Pointer to boot_params table
 
 	xorl	%ebx, %ebx
@@ -42,7 +42,7 @@ GLOBAL(protected_mode_jump)
 	.byte	0x66, 0xea		# ljmpl opcode
 2:	.long	.Lin_pm32		# offset
 	.word	__BOOT_CS		# segment
-ENDPROC(protected_mode_jump)
+SYM_FUNC_END(protected_mode_jump)
 
 	.code32
 	.section ".text32","ax"
diff --git a/arch/x86/kernel/head_64.S b/arch/x86/kernel/head_64.S
index 8b0926a..10f306e 100644
--- a/arch/x86/kernel/head_64.S
+++ b/arch/x86/kernel/head_64.S
@@ -49,8 +49,7 @@ L3_START_KERNEL = pud_index(__START_KERNEL_map)
 	.text
 	__HEAD
 	.code64
-	.globl startup_64
-startup_64:
+SYM_CODE_START_NOALIGN(startup_64)
 	UNWIND_HINT_EMPTY
 	/*
 	 * At this point the CPU runs in 64bit mode CS.L = 1 CS.D = 0,
@@ -90,6 +89,8 @@ startup_64:
 	/* Form the CR3 value being sure to include the CR3 modifier */
 	addq	$(early_top_pgt - __START_KERNEL_map), %rax
 	jmp 1f
+SYM_CODE_END(startup_64)
+
 ENTRY(secondary_startup_64)
 	UNWIND_HINT_EMPTY
 	/*