x86: Fix printk call in print_local_apic()

Instead of this:

[   75.690022] <7>printing local APIC contents on CPU#0/0:
[   75.704406] ... APIC ID:      00000000 (0)
[   75.707905] ... APIC VERSION: 00060015
[   75.722551] ... APIC TASKPRI: 00000000 (00)
[   75.725473] ... APIC PROCPRI: 00000000
[   75.728592] ... APIC LDR: 00000001
[   75.742137] ... APIC SPIV: 000001ff
[   75.744101] ... APIC ISR field:
[   75.746648] 0123456789abcdef0123456789abcdef
[   75.746649] <7>00000000000000000000000000000000

Improve the code to be saner and simpler and just print out
the bitfield in a single line using hexa values - not as a
(rather pointless) binary bitfield.

Partially reused Linus's initial fix for this.

Reported-and-Tested-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
LKML-Reference: <4A4C43BC.90506@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 13 insertions, 18 deletions

diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index 4d0216fcb36c..8fd1efb5a0bd 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -1716,25 +1716,19 @@ __apicdebuginit(void) print_IO_APIC(void)
         return;
 }
 
-__apicdebuginit(void) print_APIC_bitfield(int base)
+__apicdebuginit(void) print_APIC_field(int base)
 {
-        unsigned int v;
-        int i, j;
+        int i;
 
         if (apic_verbosity == APIC_QUIET)
                 return;
 
-        printk(KERN_DEBUG "0123456789abcdef0123456789abcdef\n" KERN_DEBUG);
-        for (i = 0; i < 8; i++) {
-                v = apic_read(base + i*0x10);
-                for (j = 0; j < 32; j++) {
-                        if (v & (1<<j))
-                                printk("1");
-                        else
-                                printk("0");
-                }
-                printk("\n");
-        }
+        printk(KERN_DEBUG);
+
+        for (i = 0; i < 8; i++)
+                printk(KERN_CONT "%08x", apic_read(base + i*0x10));
+
+        printk(KERN_CONT "\n");
 }
 
 __apicdebuginit(void) print_local_APIC(void *dummy)
@@ -1745,7 +1739,8 @@ __apicdebuginit(void) print_local_APIC(void *dummy)
         if (apic_verbosity == APIC_QUIET)
                 return;
 
-        printk("\n" KERN_DEBUG "printing local APIC contents on CPU#%d/%d:\n",
+        printk(KERN_DEBUG "\n");
+        printk(KERN_DEBUG "printing local APIC contents on CPU#%d/%d:\n",
                 smp_processor_id(), hard_smp_processor_id());
         v = apic_read(APIC_ID);
         printk(KERN_INFO "... APIC ID:      %08x (%01x)\n", v, read_apic_id());
@@ -1786,11 +1781,11 @@ __apicdebuginit(void) print_local_APIC(void *dummy)
         printk(KERN_DEBUG "... APIC SPIV: %08x\n", v);
 
         printk(KERN_DEBUG "... APIC ISR field:\n");
-        print_APIC_bitfield(APIC_ISR);
+        print_APIC_field(APIC_ISR);
         printk(KERN_DEBUG "... APIC TMR field:\n");
-        print_APIC_bitfield(APIC_TMR);
+        print_APIC_field(APIC_TMR);
         printk(KERN_DEBUG "... APIC IRR field:\n");
-        print_APIC_bitfield(APIC_IRR);
+        print_APIC_field(APIC_IRR);
 
         if (APIC_INTEGRATED(ver)) {             /* !82489DX */
                 if (maxlvt > 3)         /* Due to the Pentium erratum 3AP. */