[PATCH] x86: MP_processor_info fix

Remove the weird and apparently unnecessary logic in MP_processor_info() which
assumes that the BSP is the first one to run MP_processor_info().  On one of
my boxes that isn't true and cpu_possible_map gets the wrong value.

Cc: Zwane Mwaikambo <zwane@arm.linux.org.uk>
Cc: Alexander Nyberg <alexn@telia.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/arch/i386/kernel/mpparse.c b/arch/i386/kernel/mpparse.c
index cafaeff..15949fd 100644 (file)
--- a/arch/i386/kernel/mpparse.c
+++ b/arch/i386/kernel/mpparse.c
@@ -122,8 +122,8 @@ static int MP_valid_apicid(int apicid, int version)
 
 static void __init MP_processor_info (struct mpc_config_processor *m)
 {
-       int ver, apicid, cpu, found_bsp = 0;
-       physid_mask_t tmp;
+       int ver, apicid;
+       physid_mask_t phys_cpu;
        
        if (!(m->mpc_cpuflag & CPU_ENABLED))
                return;
@@ -181,7 +181,6 @@ static void __init MP_processor_info (struct mpc_config_processor *m)
        if (m->mpc_cpuflag & CPU_BOOTPROCESSOR) {
                Dprintk("    Bootup CPU\n");
                boot_cpu_physical_apicid = m->mpc_apicid;
-               found_bsp = 1;
        }
 
        if (num_processors >= NR_CPUS) {
@@ -195,29 +194,26 @@ static void __init MP_processor_info (struct mpc_config_processor *m)
                        " Processor ignored.\n", maxcpus); 
                return;
        }
-       num_processors++;
        ver = m->mpc_apicver;
 
        if (!MP_valid_apicid(apicid, ver)) {
                printk(KERN_WARNING "Processor #%d INVALID. (Max ID: %d).\n",
                        m->mpc_apicid, MAX_APICS);
-               --num_processors;
                return;
        }
 
-       if (found_bsp)
-               cpu = 0;
-       else
-               cpu = num_processors - 1;
-       cpu_set(cpu, cpu_possible_map);
-       tmp = apicid_to_cpu_present(apicid);
-       physids_or(phys_cpu_present_map, phys_cpu_present_map, tmp);
-       
+       cpu_set(num_processors, cpu_possible_map);
+       num_processors++;
+       phys_cpu = apicid_to_cpu_present(apicid);
+       physids_or(phys_cpu_present_map, phys_cpu_present_map, phys_cpu);
+
        /*
         * Validate version
         */
        if (ver == 0x0) {
-               printk(KERN_WARNING "BIOS bug, APIC version is 0 for CPU#%d! fixing up to 0x10. (tell your hw vendor)\n", m->mpc_apicid);
+               printk(KERN_WARNING "BIOS bug, APIC version is 0 for CPU#%d! "
+                               "fixing up to 0x10. (tell your hw vendor)\n",
+                               m->mpc_apicid);
                ver = 0x10;
        }
        apic_version[m->mpc_apicid] = ver;