2017-03-08 11:10:09

by Dou Liyang

Subject: [PATCH] x86/apic: Remove the SET_APIC_ID(x) macro

-remove the SET_APIC_ID(x) macro
-simplify the call flow
-add a comment

Signed-off-by: Dou Liyang <[email protected]>
---
arch/x86/include/asm/apic.h | 7 +------
arch/x86/kernel/apic/apic.c | 2 +-
2 files changed, 2 insertions(+), 7 deletions(-)

diff --git a/arch/x86/include/asm/apic.h b/arch/x86/include/asm/apic.h
index 730ef65..b0b4b43 100644
--- a/arch/x86/include/asm/apic.h
+++ b/arch/x86/include/asm/apic.h
@@ -252,12 +252,6 @@ static inline int x2apic_enabled(void) { return 0; }
#define x2apic_supported() (0)
#endif /* !CONFIG_X86_X2APIC */

-#ifdef CONFIG_X86_64
-#define SET_APIC_ID(x) (apic->set_apic_id(x))
-#else
-
-#endif
-
/*
* Copyright 2004 James Cleverdon, IBM.
* Subject to the GNU Public License, v.2
@@ -299,6 +293,7 @@ struct apic {
int (*phys_pkg_id)(int cpuid_apic, int index_msb);

unsigned int (*get_apic_id)(unsigned long x);
+ /* Cann't be NULL on 64-bit. */
unsigned long (*set_apic_id)(unsigned int id);

int (*cpu_mask_to_apicid_and)(const struct cpumask *cpumask,
diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index aee7ded..f3034ba 100644
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -2249,7 +2249,7 @@ void __init apic_set_eoi_write(void (*eoi_write)(u32 reg, u32 v))
static void __init apic_bsp_up_setup(void)
{
#ifdef CONFIG_X86_64
- apic_write(APIC_ID, SET_APIC_ID(boot_cpu_physical_apicid));
+ apic_write(APIC_ID, apic->set_apic_id(boot_cpu_physical_apicid));
#else
/*
* Hack: In case of kdump, after a crash, kernel might be booting
--
2.5.5

2017-03-13 20:34:16

by tip-bot for Vasyl Gomonovych

Subject: [tip:x86/apic] x86/apic: Remove the SET_APIC_ID(x) macro

Commit-ID: 5d64d209c4f672e221ea304106b30793f10d95a4
Gitweb: http://git.kernel.org/tip/5d64d209c4f672e221ea304106b30793f10d95a4
Author: Dou Liyang <[email protected]>
AuthorDate: Wed, 8 Mar 2017 19:07:50 +0800
Committer: Thomas Gleixner <[email protected]>
CommitDate: Mon, 13 Mar 2017 21:28:38 +0100

x86/apic: Remove the SET_APIC_ID(x) macro

The SET_APIC_ID() macro obfusates the code. Remove it to increase
readability and add a comment to the apic struct to document that the
callback is required on 64-bit.

Signed-off-by: Dou Liyang <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Thomas Gleixner <[email protected]>

---
arch/x86/include/asm/apic.h | 7 +------
arch/x86/kernel/apic/apic.c | 2 +-
2 files changed, 2 insertions(+), 7 deletions(-)

diff --git a/arch/x86/include/asm/apic.h b/arch/x86/include/asm/apic.h
index 730ef65..bdffcd9 100644
--- a/arch/x86/include/asm/apic.h
+++ b/arch/x86/include/asm/apic.h
@@ -252,12 +252,6 @@ static inline int x2apic_enabled(void) { return 0; }
#define x2apic_supported() (0)
#endif /* !CONFIG_X86_X2APIC */

-#ifdef CONFIG_X86_64
-#define SET_APIC_ID(x) (apic->set_apic_id(x))
-#else
-
-#endif
-
/*
* Copyright 2004 James Cleverdon, IBM.
* Subject to the GNU Public License, v.2
@@ -299,6 +293,7 @@ struct apic {
int (*phys_pkg_id)(int cpuid_apic, int index_msb);

unsigned int (*get_apic_id)(unsigned long x);
+ /* Can't be NULL on 64-bit */
unsigned long (*set_apic_id)(unsigned int id);

int (*cpu_mask_to_apicid_and)(const struct cpumask *cpumask,
diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index aee7ded..f3034ba 100644
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -2249,7 +2249,7 @@ void __init apic_set_eoi_write(void (*eoi_write)(u32 reg, u32 v))
static void __init apic_bsp_up_setup(void)
{
#ifdef CONFIG_X86_64
- apic_write(APIC_ID, SET_APIC_ID(boot_cpu_physical_apicid));
+ apic_write(APIC_ID, apic->set_apic_id(boot_cpu_physical_apicid));
#else
/*
* Hack: In case of kdump, after a crash, kernel might be booting