x86/mm/numa: Open code function early_get_boot_cpu_id()

Previously early_acpi_boot_init() was called in early_get_boot_cpu_id()
to get the value for boot_cpu_physical_apicid. Now early_acpi_boot_init()
has been taken out and moved to setup_arch(), the name of
early_get_boot_cpu_id() doesn't match its implementation anymore, and
only the getting boot-time SMP configuration code was left.

So in this patch we open code it.

Also move the smp_found_config check into default_get_smp_config to
simplify code, because both early_get_smp_config() and get_smp_config()
call x86_init.mpparse.get_smp_config().

Also remove the redundent CONFIG_X86_MPPARSE #ifdef check when we call
early_get_smp_config().

Signed-off-by: Baoquan He <bhe@redhat.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-acpi@vger.kernel.org
Cc: rjw@rjwysocki.net
Link: http://lkml.kernel.org/r/1470985033-22493-1-git-send-email-bhe@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

diff --git a/arch/x86/kernel/mpparse.c b/arch/x86/kernel/mpparse.c
index 068c4a9..0f8d204 100644 (file)
--- a/arch/x86/kernel/mpparse.c
+++ b/arch/x86/kernel/mpparse.c
@@ -499,6 +499,9 @@ void __init default_get_smp_config(unsigned int early)
 {
        struct mpf_intel *mpf = mpf_found;
 
+       if (!smp_found_config)
+               return;
+
        if (!mpf)
                return;
 

diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 0fa60f5..cbf5634 100644 (file)
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -1221,8 +1221,7 @@ void __init setup_arch(char **cmdline_p)
        /*
         * get boot-time SMP configuration:
         */
-       if (smp_found_config)
-               get_smp_config();
+       get_smp_config();
 
        prefill_possible_map();
 

diff --git a/arch/x86/mm/amdtopology.c b/arch/x86/mm/amdtopology.c
index ba47524..d1c7de0 100644 (file)
--- a/arch/x86/mm/amdtopology.c
+++ b/arch/x86/mm/amdtopology.c
@@ -52,21 +52,6 @@ static __init int find_northbridge(void)
        return -ENOENT;
 }
 
-static __init void early_get_boot_cpu_id(void)
-{
-       /*
-        * need to get the APIC ID of the BSP so can use that to
-        * create apicid_to_node in amd_scan_nodes()
-        */
-#ifdef CONFIG_X86_MPPARSE
-       /*
-        * get boot-time SMP configuration:
-        */
-       if (smp_found_config)
-               early_get_smp_config();
-#endif
-}
-
 int __init amd_numa_init(void)
 {
        u64 start = PFN_PHYS(0);
@@ -180,8 +165,11 @@ int __init amd_numa_init(void)
        cores = 1 << bits;
        apicid_base = 0;
 
-       /* get the APIC ID of the BSP early for systems with apicid lifting */
-       early_get_boot_cpu_id();
+       /*
+        * get boot-time SMP configuration:
+        */
+       early_get_smp_config();
+
        if (boot_cpu_physical_apicid > 0) {
                pr_info("BSP APIC ID: %02x\n", boot_cpu_physical_apicid);
                apicid_base = boot_cpu_physical_apicid;